At 71 years of age, i`d never have thought I would learn so much about Detroit 6.71 engines as I do most days just Listening and watching you Scott, so thank you for that.. That feeling of the first start after a rebuild always got my heart pumping listening for any not normal noises..Hope its up and running soon for you mate..
I always thought that first start after a rebuild was stressful, and for the first week or so after I'd overanalyze every little noise convincing myself something isn't right when it was really fine lol
I'm jealous! I had to give mine up! I can no longer care for it properly! My back condition has advanced for the worse! Sitting home all the time sucks 🤭
You are great diesel mechnic, I really learn and enjoy watching you. I wish I could hire you to rebuild my detroit 60 truck engine that I so much love ....😍😍😍😀 thank y for a great content
Well today I learned that I am definitely buying something with a 71 series Detroit, That UPS sucks as bad in the US as it does here in Aus, That Im not the only Dad who has a long suffering Son I feel the need to pass knowledge on to and who will take the hits his Poor old Dad isnt inclined to take like lying on the cold wet ground. I also learned that im not the only doofus who prelubed his entire toolbox but my bottle was way bigger (Coz downunder). Scott your 'dead cat' New Mic is working really well and theres zero wind noise at your workbench (And outside the other day) and that BGM Video's are almost a therapeutic replacement for the now finished Planesavers DC-3 restoration TH-cam series although that whole pratt and whitney radial engine sound under power is hard to replace but Screamin jimmies will do nicely in a pinch. Meanwhile i will console myself with a Boring all alloy 215 cu inch V8 alloy Buick Range rover project....
Here's a tip for your consideration: when inspecting the con rods, hold the wrist pin end up to the light and look thru the oil passage from the rod bearing saddle...you can determine if there is a slight bend in the rod.
somehow ended up on the first one and curiosity got me hooked and with the second one i am hooked. thanks for the upload. i will watch each one to the end and then listen to it fire up and run.
#1. Looks like she needed a little refresh. Good luck on the injectors. Good on PC at the same time shipping should have been FREE. They are getting FREE advertising. #1
True but they are floating a whole new set out on their dime until the UPS investigation is complete. Paying for the upgraded shipping is a small price to pay to finally get the darn things. A lot of companies wouldn't have sent another set out unless Scott was willing to pay for the second set (to be refunded after the claim is paid) so still good on PC industries.
A guy is driving in his bus when it throws a con rod...he's standing looking at it when a tramp walks up and asks what's wrong, ahh says the guy, piston broke....the tramp replies...I know the feeling!
I love this video series and now all old buses and 2-stroke Detroit Diesels. I have dear friends (2 couples) who are now recently retired Cummins engineers. I turned them on to this vid feed. I always opt for FedEx they seem to not crush or lose things. I guess more expensive too(?).
One more day! Tell you what, I've had a tradition for many years. I coat the cylinders with Klotz racing castor. Man, especially for the Motorheads out there, the workshop smells of Victory!
"Oh my, that awful ,,BUS,, is back again such an old clunker its broken down in front of that house" "i know, his poor wife said hello to me once when i was out in the yard, she seemed like that type" "your facelift looks great Agnes you dont look a day over 60, well worth getting a divorce to pay for since your husband didnt think you needed it, since he loved you just like you are" "are we going to bingo tomorrow" these are my neighbors if i work on anything in the yard so nosy and judgemental...
When you load the liners, if you will put the liner on the floor, and stand over the liner as you push the piston into the liner in one smooth motion, it is much easier and quicker. I was taught that method when I was a young mechanic working for the Detroit Diesel distributor in Texas.
I had a tube of trailer ball lube in the top tray of my tool box. Splits formed at the folded over take up end of the soft metal tube and both ends of the fold leaked into my tools. It even smelled bad! 3 hours with a parts washer and a rag coated with clean oil. As far as UPS I have only two words: *DELIVERY EXCEPTION*
Hey Scott, I don’t often comment but really enjoy your channel. I have been working as a diesel mechanic for 25 years. In my opinion, at least some if not all of the funny wear on those rod and main bearings could be attributed to the crack in the oil pickup that has been repaired. Also I wouldn’t sweat that one liner that’s a little slack. I work on large marine medium speed engines, but have been in many a jimmy throughout my career. Thanks and good job! Btw my buddy’s got a 4107 that I kinda help keep going! Taker easy, Will
@@cw3339 unfortunately so. I work at an auto salvage yard and we used to use ups. Most of the time the parts would come back because ups damaged them and said it was our fault for not properly packing them... when in fact we always use more material than needed to avoid damages. They have also lost or misdelivered packages and we never got anywhere trying to get them to correct their mistake. I do agree the drivers are good just not the company they work for.
wow you work fast, i am doing the same type of rebuild on a vw bus and has taken me about 4 weeks so far lol. good work. ups really should have helped you out.
Looking forward to the install. There was a guy on TH-cam that is in need of some assistance about the engine. It's the same engine that is in your bus you are currently working on I dropped your name Hoping gives you a shout. The rain has stopped here in Florida and man is it HOT.
On the oil rings I like the ring gap about 90 degrees from the spring gap and the 2 rings on the opposite side of the piston. I have pulled pistons out with every ring gap in line, the engine was low hours with major problems.
Good luck with UPS! I stopped using them due to overpricing and the arrogance the of UPS management (the UPS drivers have been very good) when something like losing a package occurs. I suspect they'll come back and say the package wasn't properly prepared and they'll deny the insurance. UPS's insurance is run out of the Caymen Islands. BTW... UPS 3 day "ground" is actually air shipping. They charge an air freight fuel surcharge on 3 day ground shipments. It costs almost the same as 2 day air.
Don’t get to bent out of shape about ups, it still amazes me how ups and fed x manages all those packages, way back in the the day our supplier would go to the airport buy a ticket put the package on the plane in a seat and arrange for someone to move it to another plane if not direct flight and I would go to our local airport and retrieve the package, sometimes off the plane. One 55.00 part holding up a several million dollar operation, but we did it. Now next day to me is a damn miracle. Just take a deep breath and thank god there a smart people out there to get our stuff next day air.
I don't see many mechanics paying attention to cleanliness. It is nice to see someone who does it right. I always an treat engine assembly like an operating room. I noticed some nicks on your rod thrust bearing surfaces. Not sure if they stick out or not. Also I was wondering why your rod bearing wear is at the edges like the shoulders on the crank are higher than the middle. Do you use plasti gage to check oil clearances? Keep up the good work.
I knew a mechanic who did an inframe on a 6-71 and he put the inserts with the oil hole in the bearing caps instead of in the connecting rods. Needless to say, the pistons seized up during the test drive.
Oil analysis would be a good thing. It can forewarn you of wear (what parts are suspected), leaks and also lets you know if you can continue to use the oil or drain it.
Isn't it strange UPS spends Millions of dollars advertising month in month out..but when its clearly there fault they cant seem to do the right thing stepping up with a few bucks for Customer Service in order to regain please except our error...
Buster Brown (UPS driver ) just plain delivered it to a wrong address . As fast as Buster has to do his route , he has no idea where he delivered them . The are walking ,running machines
I have really been enjoying your videos. You have a real professional ability, with a very comfortable approachable demeanor. I have learned a lot from watching just from the clear way you communicate what you are doing. Although Not Detroit powered, I traded some farm tractors for two road tractors, an R Mack and a White 4000. They have both been sitting for quite a while, and your channel has inspired me to film and post videos of the process of getting them running and driving again. Thanks for your great channel.
Just a tip. If you can twist the pistons in the liners you can be sure an oil control ring didn’t break. You pretty much can tell if you break one when you load it in the liner. The piston is not able to spin if you break a ring.
Can't believe you did not check ring gap. Did you look at counter bores I know it does not make as big of a deal with dry liners but it can make a difference
Run shell rotella and add a zinc additive. But the rotella full synth should get you the protection you need for those bearings. In leu of the zinc, I use Militec-1 in all my vehicles. It actually impregnates all the bearing surfaces and prevents metal to metal contact. My Toy Tacoma is running strong still on that combo. 400k miles. No leaks and full compression.
2 strokes run hotter than modern 4 stroke diesels. You can't compare a Tacoma to a 671 in any way. Very different bearing clearances, surface temperatures and torque loads.
@@DougHanchard Clearly, you know that there are differences. That's awesome. But Shell Rotella is a diesel engine specific oil. Google would have helped with that.
@@theshyguitarist Okay, I'll come out and say it, as much as I use Shell Rotella products in some engines (Cummins, Cats, etc), I prefer to use another brand in 671s for the reasons I mentioned. These engines get used hard and don't have the same fuel efficiency as other DD engines. They were a great low rpm / city engine but for the open road, in my opinion, they just wear out faster and part of the issue is oil quality and the massive bearing surfaces that have a hard time staying cool.
@@DougHanchard I think running a Detroit 2-stroke in city buses is about the worst you could do---all that stop and go PLUS a lot of idling---idling is the worst thing you can do to a Detroit. My opinion anyways.
These Detroit diesel 671's seem so very serviceable. Wouldn't have imagined in frame rebuild would be so 'easy'. I am interested to find out how you use propane to operate your rig there.
On medium speed diesel engines I have seen cavitation damage on wet liners which was caused by a broken piston ring. The end of the ring runs hotter as combustion gas leaks past. This creates a steam pocket on the outside of the liner ,in the coolant. It erodes the liner wall in a line as the piston goes travels .Eventually a pin hole develops dumping coolant into the liner. We would see these tiny holes when using a endoscope to investigate hot running. Sometimes it was only when the engine was cold and being barred over with the ports opened that the leaks were obvious with a stream of alfloc squirting out the port. Not good. Or if a engineer decided to simply start the engine without barring it over.....clunk!$$$$$$$$$$$$$$$$$$$$$$$$$$. That Rod bearing with the odd wear looks like the rod may be twisted. Next time it is out it may pay to get it checked.
The wet liner isn't a bad system, except that many are very old now. Miles can be very low, but age is relevant, too. I believe that the age of the o-rings affects reliability. So many people who believe that they "need a new head gasket" really have a bad o-ring or rings. Could be very frustrating to have an older 92 series engine with "low mileage," and discover coolant in the oil!
Given how much weight is in the top of those imacs I'm not sure I'd trust it just mounted by the base. It could break off. Instead I would just designate a place to lay it flat when underway (like a bed)
I had considered that but it only takes one time of forgetting to stow it for it to smash to the floor. And i forget about stowing stuff all the time so i know it would happen. I’d rather try the chance that it might break VS i know i will break it. I may attach a feather to the back as a safety
@@BusGreaseMonkey yeah, you'd think Scott. I had to look elsewhere too for good DD parts. Just cause its more expensive doesnt mean its good. the same with being too cheap either. You'd think you'd be paying for good QA. hopefully they wont lose your new inj.
Our fleet of brand new American made equipment with state of the art Cummins engines say Made in China all over them. Every manifold, bracket, sensor Cummins related isn't made here anymore.
I doubt it's the propane hurting the rod bearings, more likely hours of high rpm highways. Looks like you need an overdrive, or larger diameter drive tyres.
Do your connecting rods only go on the piston wrist pin one way to get the thrust side where it belongs? Maybe not on a two-stroke? You produce excellent content and I look forward to the next! Another job well done!
How's that A/C work in your bus?? Hopefully it's cold as a bugger!! Great video. Wish you had time to do your engine properly at one time!! It would be nice t have a big ole garage to work in at home eh?
It’s amazing no one knows anything about everything at UPS ! They treat there employees like robots. Hopefully you’ll receive satisfaction on this whole ordeal ! On the inner city rings does it mean less smoke therefore less horsepower ? SKOL BUD !
I was so disappointed to hear genuine Detroit parts are inferior and have parts missing from the kits. WTF has happened to American industry? We used to be the gold standard the rest of the world looked up to, now we can't even make repair parts?! Have we become a I-can't-be-bothered-throw-it-away-and-put-in-a-crate-motor society? Kudos to the Indians for making high quality parts and making sure everything is included! We need to learn from them!
Thank you again for the great details in your vids! Curious about ring end gap/bearing fitment, are the liner/piston/rings pre fit when they come? Thx!
@@BusGreaseMonkey If all that's holding 40psi oil pressure back is a set of thin interference fit steel cups I'd be worried they'd be hydrauliced out and the motor would loose oil pressure.
, how is it that you have the special tool to set the wrist pin retainer and you don't have a ring expander, .it makes the job so much easier and no chance of over expanding the rings . also, did i miss something or what,,,,,,,,i didn't see you make any measurements in the block bore to see what size replacement liners you should use......if i remember correctly, there were 16 measurements and then you took the average to pick standard or oversize or whatever
Allway check the gap.. just put tbe rings on tbe culinder minus the piston. I use the.piston to push dwn tbe rings. Into a emty bore. Pull out . Then measure the gap..u do t need a bunch fancy tools.. lol.. if your in the bush . Just eyeball it
What was your main reason for going with older style trunk pistons? The higher RPMs you are typically running? The crossheads should have lower oil consumption and wear right? Are the more of a pain to install even if they last longer? I might have a lead on a 4106 so am reading up on the 71 series (previously mainly interested in 53 series for a truck swap I haven't completed yet... I've heard of pulling engines in the 53 series using trunk pistons for high RPMs (around 5k on a 453T if I remember correctly of course the wear is porportionally worse at high RPMs as well as broken cranks becoming a factor I think the guy had an 8v71 turbo on his 453 which is pretty much insane).
Yeah, I'm late to the party on your channel but I'm finding your "Bus Finds" very cool! Anyways, Could you tell me how many miles this bus had on it or any mileage history of the motor? Curious Minds.
Does Detroit recommend using a coating on the dry liners to aid in heat transfer from the liner to the block? Many of you liner/sleeve manufacturers for gas applications do.
![ตีสิบเดย์ [FULL] | อาจารย์โอเล่ ญาณสัมผัส ผ่าดวงคนดัง ประเทศไทยจะเป็นยังไงหลังจากนี้!](http://i.ytimg.com/vi/gszT2O76fL4/mqdefault.jpg)
As a 67 year old heavy diesel mechanic, (retired) I look forward to your recordings. The sound of that GM Detroit two stroke is ace, i love it.
At 71 years of age, i`d never have thought I would learn so much about Detroit 6.71 engines as I do most days just Listening and watching you Scott, so thank you for that.. That feeling of the first start after a rebuild always got my heart pumping listening for any not normal noises..Hope its up and running soon for you mate..
I always thought that first start after a rebuild was stressful, and for the first week or so after I'd overanalyze every little noise convincing myself something isn't right when it was really fine lol
Looking forward to the next episode. This is better than Netflix
I agree 💯%
Hell, at my age, it's better than sex!
Glad to see that I am not the only one that uses my kitchen countertop to do clean work.
or the dishwasher to clean the pistons...
I can't wait to here that old faithful Detroit crack to life again!! I am sure you feel the same way.
Ya gotta know the wife loves the bus, when she let's ya work on it in the kitchen! Good vid!
I'm jealous! I had to give mine up! I can no longer care for it properly! My back condition has advanced for the worse! Sitting home all the time sucks 🤭
Love the father and son work! Tyler looks more like your twin brother!
You both look ready for matching heart attacks! Try to take better care of yourselves, please 🙀
You are great diesel mechnic, I really learn and enjoy watching you. I wish I could hire you to rebuild my detroit 60 truck engine that I so much love ....😍😍😍😀 thank y for a great content
Photographer AND bus mechanic...you got a killer skill set & resume man, love your vids.
How's your back with all this rain! Mines hell! Only Kratom tea helps! As I can no longer get proper opioid pain medication! But kratom does help!
Glad to see that I'm not the only one with parts issues. Persistence is definitely a earned skill. Keep up the awesome work.
Wow, missed out on whatever I was supposed to be doing, but watching Scott and his son is way better than whatever i fogot to do, 👍👌❤🇨🇦
Well today I learned that I am definitely buying something with a 71 series Detroit, That UPS sucks as bad in the US as it does here in Aus, That Im not the only Dad who has a long suffering Son I feel the need to pass knowledge on to and who will take the hits his Poor old Dad isnt inclined to take like lying on the cold wet ground.
I also learned that im not the only doofus who prelubed his entire toolbox but my bottle was way bigger (Coz downunder).
Scott your 'dead cat' New Mic is working really well and theres zero wind noise at your workbench (And outside the other day) and that BGM Video's are almost a therapeutic replacement for the now finished Planesavers DC-3 restoration TH-cam series although that whole pratt and whitney radial engine sound under power is hard to replace but Screamin jimmies will do nicely in a pinch.
Meanwhile i will console myself with a Boring all alloy 215 cu inch V8 alloy Buick Range rover project....
Here's a tip for your consideration: when inspecting the con rods, hold the wrist pin end up to the light and look thru the oil passage from the rod bearing saddle...you can determine if there is a slight bend in the rod.
Cool keep up the videos and thanks for your time in bringing us along very interesting
Thanks for sharing your knowledge on the mighty Detroit engine 👍🇦🇺
Reminds me off the 70s, carried out my apprenticeship with Blackwood Hodge , plenty of rebuilds on Terex earth moving equipment, great vid 👍👍
I'm learning something new everyday keep up the good work I enjoy your videos
somehow ended up on the first one and curiosity got me hooked and with the second one i am hooked. thanks for the upload. i will watch each one to the end and then listen to it fire up and run.
#1. Looks like she needed a little refresh. Good luck on the injectors. Good on PC at the same time shipping should have been FREE. They are getting FREE advertising. #1
True but they are floating a whole new set out on their dime until the UPS investigation is complete. Paying for the upgraded shipping is a small price to pay to finally get the darn things. A lot of companies wouldn't have sent another set out unless Scott was willing to pay for the second set (to be refunded after the claim is paid) so still good on PC industries.
One of my favorite channels .. keep up the great work I'm a Diesel mechanic as well but never worked on busses.. cool stuff!
Oldest engine I've done is 12 liter Detroit these is so cool.... that you for sharing!!!
A guy is driving in his bus when it throws a con rod...he's standing looking at it when a tramp walks up and asks what's wrong, ahh says the guy, piston broke....the tramp replies...I know the feeling!
I love this video series and now all old buses and 2-stroke Detroit Diesels. I have dear friends (2 couples) who are now recently retired Cummins engineers. I turned them on to this vid feed. I always opt for FedEx they seem to not crush or lose things. I guess more expensive too(?).
I have rebuilt all of the 71 series and 92 series Detroit's thanks for the memory .
Looks like a lot of real hard work. Great video !! And right to the point. A+
One more day! Tell you what, I've had a tradition for many years. I coat the cylinders with Klotz racing castor. Man, especially for the Motorheads out there, the workshop smells of Victory!
As much as I loathe HOA's, I'm sure you are the talk of the neighborhood...
"Oh my, that awful ,,BUS,, is back again such an old clunker its broken down in front of that house"
"i know, his poor wife said hello to me once when i was out in the yard, she seemed like that type"
"your facelift looks great Agnes you dont look a day over 60, well worth getting a divorce to pay for since your husband didnt think you needed it, since he loved you just like you are"
"are we going to bingo tomorrow"
these are my neighbors if i work on anything in the yard so nosy and judgemental...
@@fixt100 Gotta love neighbors! Lol
HOA stands for Harassment Only Association
@@fixt100 Savage haha
Fixt100 that’s the beauty of Indiana, hell, I bet a neighbor down the street has a couch in the front yard.
When you load the liners, if you will put the liner on the floor, and stand over the liner as you push the piston into the liner in one smooth motion, it is much easier and quicker. I was taught that method when I was a young mechanic working for the Detroit Diesel distributor in Texas.
Wow I bet your wife loves this kitchen table bus repair. ? I knew a guy that did trans on kitchen table.Love the vids big fan.
I had a tube of trailer ball lube in the top tray of my tool box. Splits formed at the folded over take up end of the soft metal tube and both ends of the fold leaked into my tools. It even smelled bad! 3 hours with a parts washer and a rag coated with clean oil.
As far as UPS I have only two words: *DELIVERY EXCEPTION*
I've used tubing on rod bolts, but have never cut the locking tab. Thanks for the tip!
I love the video
Thank you for the video, I really appreciate the expertise you have and your willingness to share.
Another cool video i feel your pain with all this rain hang in there.
I remember your video describing your photography experience. Remind me where you got all the Detroit Diesel experience.
Amazing how complex the pistons are crazy
Hey Scott, I don’t often comment but really enjoy your channel. I have been working as a diesel mechanic for 25 years. In my opinion, at least some if not all of the funny wear on those rod and main bearings could be attributed to the crack in the oil pickup that has been repaired. Also I wouldn’t sweat that one liner that’s a little slack. I work on large marine medium speed engines, but have been in many a jimmy throughout my career. Thanks and good job! Btw my buddy’s got a 4107 that I kinda help keep going! Taker easy, Will
Good video prayers for the weather to hold off
Glad to hear you'll be taken care of on those injectors. Ups really doesn't seem like they care. At least your 6-71 is coming along nicely.
UPS really sucks! I do everything to avoid using them!
What can Brown do for you? Lose your package...
@@cw3339 unfortunately so. I work at an auto salvage yard and we used to use ups. Most of the time the parts would come back because ups damaged them and said it was our fault for not properly packing them... when in fact we always use more material than needed to avoid damages. They have also lost or misdelivered packages and we never got anywhere trying to get them to correct their mistake. I do agree the drivers are good just not the company they work for.
Keep up the good work, it sucks when parts get delivered to the wrong place and you have to wait......
wow you work fast, i am doing the same type of rebuild on a vw bus and has taken me about 4 weeks so far lol. good work. ups really should have helped you out.
Looking forward to the install. There was a guy on TH-cam that is in need of some assistance about the engine. It's the same engine that is in your bus you are currently working on I dropped your name Hoping gives you a shout. The rain has stopped here in Florida and man is it HOT.
On the oil rings I like the ring gap about 90 degrees from the spring gap and the 2 rings on the opposite side of the piston. I have pulled pistons out with every ring gap in line, the engine was low hours with major problems.
Love the show.what a man.nice sound today.good Job
What beautiful looking new 71series liners. I thought reliabilt was the real deal. Cheers from Australia.
Good luck with UPS! I stopped using them due to overpricing and the arrogance the of UPS management (the UPS drivers have been very good) when something like losing a package occurs. I suspect they'll come back and say the package wasn't properly prepared and they'll deny the insurance. UPS's insurance is run out of the Caymen Islands.
BTW... UPS 3 day "ground" is actually air shipping. They charge an air freight fuel surcharge on 3 day ground shipments. It costs almost the same as 2 day air.
You gotta love the Indiana weather, early this morning it was sprinkling now later in the day its hot and muggy
Don’t get to bent out of shape about ups, it still amazes me how ups and fed x manages all those packages, way back in the the day our supplier would go to the airport buy a ticket put the package on the plane in a seat and arrange for someone to move it to another plane if not direct flight and I would go to our local airport and retrieve the package, sometimes off the plane. One 55.00 part holding up a several million dollar operation, but we did it. Now next day to me is a damn miracle. Just take a deep breath and thank god there a smart people out there to get our stuff next day air.
UPS can burn in hell!
Love to see an old machine being reborn / renewed. Certainly seems like subpar customer service on the part of a certain transportation company...
Thanks Scott...great videos!
I don't see many mechanics paying attention to cleanliness. It is nice to see someone who does it right. I always an treat engine assembly like an operating room. I noticed some nicks on your rod thrust bearing surfaces. Not sure if they stick out or not. Also I was wondering why your rod bearing wear is at the edges like the shoulders on the crank are higher than the middle. Do you use plasti gage to check oil clearances? Keep up the good work.
Very interesting video. Now i want to rebuild one.
Looks look are playing with toys ... heavy duty toys !!!! Would love to have a BUS
I just learned another little trick. Thank you
What was that?
I knew a mechanic who did an inframe on a 6-71 and he put the inserts with the oil hole in the bearing caps instead of in the connecting rods. Needless to say, the pistons seized up during the test drive.
Hopefully, UPS makes it right soon!
Yes, they are having an 8 day investigation to determine what to do!
Or just goes out of business! Their service has really gone down the toilet!
That's why the wife can't have nice things! Hubby's working on the engine on the kitchen table. LoL I remember those days as a kid. LoL
Great video guys....Thank you for sharing...
Oil analysis would be a good thing. It can forewarn you of wear (what parts are suspected), leaks and also lets you know if you can continue to use the oil or drain it.
I agree ups should eat the next day air shipping
UPS should also recognize the high visibility of this issue. If it were up to me, I'd do my best to make it right!
Thank you Lord for all the rain but may we have a reprieve for a week or so...
You make it look easy.
Great episode!
Isn't it strange UPS spends Millions of dollars advertising month in month out..but when its clearly there fault they cant seem to do the right thing stepping up with a few bucks for Customer Service in order to regain please except our error...
It's not about "shipping", it's LOGISTICS. Another worthless buzzword to deflect from their BS.
Buster Brown (UPS driver ) just plain delivered it to a wrong address . As fast as Buster has to do his route , he has no idea where he delivered them . The are walking ,running machines
Thank God the Amazon drones will deliver without error ;)
Loyal fan Ottawa Ontario Canada
Love this stuff!
I have really been enjoying your videos. You have a real professional ability, with a very comfortable approachable demeanor. I have learned a lot from watching just from the clear way you communicate what you are doing. Although Not Detroit powered, I traded some farm tractors for two road tractors, an R Mack and a White 4000. They have both been sitting for quite a while, and your channel has inspired me to film and post videos of the process of getting them running and driving again. Thanks for your great channel.
Just a tip. If you can twist the pistons in the liners you can be sure an oil control ring didn’t break. You pretty much can tell if you break one when you load it in the liner. The piston is not able to spin if you break a ring.
Can't believe you did not check ring gap. Did you look at counter bores I know it does not make as big of a deal with dry liners but it can make a difference
Thanks for the video.
Thank you
Wet liner is good if you use proper coolant additives to prevent cavetation
Run shell rotella and add a zinc additive. But the rotella full synth should get you the protection you need for those bearings. In leu of the zinc, I use Militec-1 in all my vehicles. It actually impregnates all the bearing surfaces and prevents metal to metal contact. My Toy Tacoma is running strong still on that combo. 400k miles. No leaks and full compression.
2 strokes run hotter than modern 4 stroke diesels. You can't compare a Tacoma to a 671 in any way. Very different bearing clearances, surface temperatures and torque loads.
@@DougHanchard Clearly, you know that there are differences. That's awesome. But Shell Rotella is a diesel engine specific oil. Google would have helped with that.
@@theshyguitarist Okay, I'll come out and say it, as much as I use Shell Rotella products in some engines (Cummins, Cats, etc), I prefer to use another brand in 671s for the reasons I mentioned. These engines get used hard and don't have the same fuel efficiency as other DD engines. They were a great low rpm / city engine but for the open road, in my opinion, they just wear out faster and part of the issue is oil quality and the massive bearing surfaces that have a hard time staying cool.
@@DougHanchard I think running a Detroit 2-stroke in city buses is about the worst you could do---all that stop and go PLUS a lot of idling---idling is the worst thing you can do to a Detroit. My opinion anyways.
So, do you have to worry about the ring end gaps?
These Detroit diesel 671's seem so very serviceable. Wouldn't have imagined in frame rebuild would be so 'easy'. I am interested to find out how you use propane to operate your rig there.
On medium speed diesel engines I have seen cavitation damage on wet liners which was caused by a broken piston ring. The end of the ring runs hotter as combustion gas leaks past. This creates a steam pocket on the outside of the liner ,in the coolant. It erodes the liner wall in a line as the piston goes travels .Eventually a pin hole develops dumping coolant into the liner. We would see these tiny holes when using a endoscope to investigate hot running. Sometimes it was only when the engine was cold and being barred over with the ports opened that the leaks were obvious with a stream of alfloc squirting out the port. Not good. Or if a engineer decided to simply start the engine without barring it over.....clunk!$$$$$$$$$$$$$$$$$$$$$$$$$$.
That Rod bearing with the odd wear looks like the rod may be twisted. Next time it is out it may pay to get it checked.
None of them have odd wear. All the old ones have the severe wear. The one that i put in years ago is the only good one but it too is being replaced.
Them old 2 stroke Detroit engines were TOUGH & very reliable
I live in Indiana too up in Arcadia Indiana I’d love to come help y’all fix your bus
5:26 Typical champagne sound! 🍾
nice screen ..i love my imac
The wet liner isn't a bad system, except that many are very old now. Miles can be very low, but age is relevant, too. I believe that the age of the o-rings affects reliability. So many people who believe that they "need a new head gasket" really have a bad o-ring or rings. Could be very frustrating to have an older 92 series engine with "low mileage," and discover coolant in the oil!
Age is the problem. A 71 cam did for 10 years and no issues, a 92 is about 50/50 for coolant in the oil
Given how much weight is in the top of those imacs I'm not sure I'd trust it just mounted by the base. It could break off. Instead I would just designate a place to lay it flat when underway (like a bed)
I had considered that but it only takes one time of forgetting to stow it for it to smash to the floor. And i forget about stowing stuff all the time so i know it would happen. I’d rather try the chance that it might break VS i know i will break it. I may attach a feather to the back as a safety
I too havent had good luck with genuine parts other than the older NOS stuff. the new stuff isnt terribly good anymore.
You would think they are better, i mean they cost more right.
@@BusGreaseMonkey yeah, you'd think Scott. I had to look elsewhere too for good DD parts. Just cause its more expensive doesnt mean its good. the same with being too cheap either. You'd think you'd be paying for good QA. hopefully they wont lose your new inj.
Our fleet of brand new American made equipment with state of the art Cummins engines say Made in China all over them. Every manifold, bracket, sensor Cummins related isn't made here anymore.
I doubt it's the propane hurting the rod bearings, more likely hours of high rpm highways. Looks like you need an overdrive, or larger diameter drive tyres.
Do your connecting rods only go on the piston wrist pin one way to get the thrust side where it belongs? Maybe not on a two-stroke?
You produce excellent content and I look forward to the next! Another job well done!
How's that A/C work in your bus?? Hopefully it's cold as a bugger!! Great video. Wish you had time to do your engine properly at one time!! It would be nice t have a big ole garage to work in at home eh?
It’s amazing no one knows anything about everything at UPS ! They treat there employees like robots. Hopefully you’ll receive satisfaction on this whole ordeal ! On the inner city rings does it mean less smoke therefore less horsepower ? SKOL BUD !
You need an E-Z up awning for the rain!
I have one. Boy the hoa would love that even more. I’ll just wait for no rain tomorrow
I was so disappointed to hear genuine Detroit parts are inferior and have parts missing from the kits. WTF has happened to American industry? We used to be the gold standard the rest of the world looked up to, now we can't even make repair parts?! Have we become a I-can't-be-bothered-throw-it-away-and-put-in-a-crate-motor society? Kudos to the Indians for making high quality parts and making sure everything is included! We need to learn from them!
Thank you again for the great details in your vids! Curious about ring end gap/bearing fitment, are the liner/piston/rings pre fit when they come? Thx!
What causes the top ring to lock to the piston like the one you pulled out?
This has become my favorite channel!
Those wrist pin plugs might also be to stop blower air getting into the crankcase.
Oil pressure 40psi, airbox pressure is super low, just above atmospheric. More like keeping oil out of the airbox.
@@BusGreaseMonkey If all that's holding 40psi oil pressure back is a set of thin interference fit steel cups I'd be worried they'd be hydrauliced out and the motor would loose oil pressure.
It’s been doing great since the late 1930’s i don’t think you should be worried...
But it doesn't have full oil gallery pressure there though does it? It's more directed splash cooled - perhaps I'm wrong.
Yup i had that lucas leak ALL over my toolbox several times. Big mess
Trash talking UPS on TH-cam with a guy with 31k subs = Priceless
Have you used a ring expander? I've found they speed things up s lot and with very little chance of breaking the ring.
It's not needed on Detroit rings, they're easy to install by hand
I thought the same thing. So much more control with a ring expander less chance of breaking a ring. And less chance of missing up the oil control ring
, how is it that you have the special tool to set the wrist pin retainer and you don't have a ring expander, .it makes the job so much easier and no chance of over expanding the rings . also, did i miss something or what,,,,,,,,i didn't see you make any measurements in the block bore to see what size replacement liners you should use......if i remember correctly, there were 16 measurements and then you took the average to pick standard or oversize or whatever
so rings are all pre gapped? you trust them?
Allway check the gap.. just put tbe rings on tbe culinder minus the piston. I use the.piston to push dwn tbe rings. Into a emty bore. Pull out . Then measure the gap..u do t need a bunch fancy tools.. lol.. if your in the bush . Just eyeball it
What was your main reason for going with older style trunk pistons? The higher RPMs you are typically running? The crossheads should have lower oil consumption and wear right? Are the more of a pain to install even if they last longer? I might have a lead on a 4106 so am reading up on the 71 series (previously mainly interested in 53 series for a truck swap I haven't completed yet... I've heard of pulling engines in the 53 series using trunk pistons for high RPMs (around 5k on a 453T if I remember correctly of course the wear is porportionally worse at high RPMs as well as broken cranks becoming a factor I think the guy had an 8v71 turbo on his 453 which is pretty much insane).
Because that’s the rods i had. It’s an in-line
Yeah, I'm late to the party on your channel but I'm finding your "Bus Finds" very cool! Anyways, Could you tell me how many miles this bus had on it or any mileage history of the motor? Curious Minds.
Does Detroit recommend using a coating on the dry liners to aid in heat transfer from the liner to the block? Many of you liner/sleeve manufacturers for gas applications do.
Never