Detroit diesel 6v92TA diagnosis goes from bad to worse. Broken timing gear, scored liners, bad cam
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- เผยแพร่เมื่อ 5 มิ.ย. 2023
- This inframe rebuild of the detroit diesel 6v92TA quickly turned into a much more serious situation. The engine needs to come out and really be looked at much more closely
1st video on this bus • Very sick detroit dies...
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And it drove in under its own highly diminished power. All those issues you've discovered and still it ran. Not well but it ran. It's a testament to the skill and talent of the designers and engineers who built the thing. The abuse and ignorant treatment it received over the years is mind boggling. Time to set it right one way or another.
So laid back, that Scott inspects the bearings in a hammock 👍🤘🍻
There will be fingerprints…😮
I was thinking the same thing when it started 😂
Look at that beautiful tractor working!
Sorry for the owner/operator's misfortune, but I'm loving the videos!! Keep 'em coming!!
Scott, that New Holland really shined on this job! What a mess that engine is in. Thankfully the owner came to the right place! Great video! Thanks!
G'day everyone,
Wow that ended up being heaps of work. But doesn't your new tractor look the business.
✌️ Peace from Melbourne Australia.
Looks like that shop vac gave it just the extra ballast weight you needed to pull that engine 🤣
When I was driving motor coach commercially, we had a bunch of those 6v92 engines. I hated driving them. I was not a mechanic on those, so never turned a single wrench. All I know is that uphill in the Appalachian mountains, it was 20 MPH. (I'm glad I never had to take one out west where I have lived most of my life to the Rocky Mountains. I could have probably drank a 12 pack of beer, still be sober, let the bus climb, hop out and relieve myself jog to catch it and still be OK. before we hit the peak.) Luckily, they were all quickly phased out by the 60 series and the MCI 45 D3-102.
I guess your 6v 92s were turned down compared to ours. I drove MC9s from Bakersfield to Barstow over Tehachapi pass many times and I liked them. Better power than the V8 71s we used before.
@@wnewbury4 I would not doubt it.
Most 6v92ta’s we see are set up less hp than non turbo 8v71’s. More torque but usually less hp sad little fuel economy injectors.
@@BusGreaseMonkey that’s sad, but even though I never footed the bill, I was getting about 6 M/Gal.
@@BusGreaseMonkey You know what is funny. Some engines were detuned so bad people often saw fuel mileage increases after tuning them for more HP.
It happened not just on diesels but often gutless V8 gas engines too.
The reason why people found better mileage with more power was because the engine now had enough power to stay in a higher gear longer.
Less downshifting meant higher mileage at the end of the day.
Those gutless engines were like cutting off your nose to spite your face. They only looked good to pencil pushers.
Maybe they worked out and gave higher mileage in totally flat country but wherever you had to downshift to make hills they were often worse than just giving someone a more powerful engine in the first place.
You guys have this down to a science pulling these...watched you back when you did your bus.
Pakistani truck did a head repair video, cut a deep V groove in it, filled it with lots of weld. Planned it down and good to go!
I am repeating what Dauane states "Sorry for the owner/operator's misfortune, but I'm loving the videos!! Keep 'em coming!!"
Having peeked into the innards of our city buses, I know kinda what's in there. This is incredibly educational to see the removal process. Looking forward to the rebuild work. Love a machine that can be renewed.
Impressive again! You guys continue to outdo yourselves with each major overhaul!
New tractor came in really handy ! Great job guys !
New subscriber to the channel. What you do is so informational.
My background is in ACVW's and German cars in general. Worked as a tech for 20 years. Owned two VW shops. Became a postal worker during the pandemic.
What you guys do is awesome. In California we don't have cool stuff like this anymore. My dad was a truck driver for almost 20 years, but he was the mechanic I learned from. The 1st big rig he had was a stretched out Kenworth K100 with a 318 DD. Man, that thing with short dual stacks sounded like an angry cat going up the Grapevine with 80K#.
I love odd stuff like two strokes, rotaries and boxer engines. Worked on many 356's to 997 Porsches.
Having owned VW busses, the spirit of what you do is magnetic.
Big fan
Always entertaining and educational. Thanks for sharing yalls talents and adventures!!!
Great to see new vids after a hiatus, missed you guys.
We have posted quite a few videos lately
Looks like a great engine rebuild project coming up.
That sure looks a lot easier to pull the motor than on an 80's jefferson yacht.
Smart move on the grease monkey having the two chimps do the heavier work. Good job guys.
been watching for about a year - great vids thank you!
Love those counter weights!!!
I remember how many you did out on the road. Must be nice going home every night.
It has been a dream to own a late model MCI MC8. There are a few conditions that must be met. It has to have the steppes roofline. The drivers area must be stock. Standard or semi automatic transmixer, I don't care, as long as it is a factory installation, and finally, these guys will do a complete inspection, and repair or replace anything that needs it, including an out of body rebuild of the entire drive train. I know that means a lot of money, but the only way I'll be able to afford something like this is to win the lottery big time, so I'll be able to afford it. Please, please buy a proper ballast box for the NH and fill it with concrete. That mower , even with the extra stuff on it isn't enough weight for carrying engines on the front end.
Oops, another that needs one of everything and then some. Keep ‘em running, would love to see the rebuilding of that engine
I love your intro music, so cool... makes me wanna watch the video.
I think the engine is in your hands. It will run, and well.
That head was repaired using metal stitching pins. It was once a much more common practice.
@0:40 Now that's a true shade tree mechanic!
good news: its going to be a lot easier than we though to do all of those pistons.
bad news: its because we had to yank the pack to get at another problem.
Been a while since I seen a motor pulled from a MCI last time was the first video I ever watched you do by hand with come alongs. Side note I think you need a bigger tractor lol
No Comment’s - Great 👍🏼 Job !!!!!
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Never saw a full engine pulled from a Bus before. Very interesting
I wonder if the missing tooth will be found in the bottom of the pan. It's very fortunate that it held together given it's woes. I can't wait to see this unit rebuilt and back on the road. I wonder how long it had been since it had been opened up last.
A great video as always Scott:-)
Interesting crack repair, I don't see that too often. It's called metal stitching or metallock. It's a good repair, just odd to see on a 6v92 head which wouldn't have been rare. The labor to prep and do it is pretty high, considering how cheap reman heads are.
Seems the hands before should not have been this bus work sure is tight quarters nice work boys enjoy the channel😊😊😊
I believe this bus used to belong to the Calvary Chapel in Sacramento. Previously might have been a Lucky Tours bus, but can’t confirm that.
"Death Playing the Fiddle" comes to mind with all the damages.
Awesome video 👍👍👍
love the video's like this.
sad to hear about having to pull the hole block but i look at it like this you can now do a full block clean as i am sure there is kibble and bits in there hiding.
Great video! I may be wrong, but with that load on the tractor it seemed on camera that the front tires could be aired up a bit. I was afraid that a tire would walk off the bead.
My TLB would probably not handle moving that engine. The New Holland is a sweet addition!
Looks like you could use some rear wheel weights on the tractor. Great video!
Amazing it still ran.
Balance of the whole rotating assembly is VERY important on a V6. These are among the most difficult engines to engineer because they are inherently unbalanced.
Don't forget it's a 2-stroke; the balancing is a little better than a 4-stroke since each cylinder fires once per revolution.
@@CanizaM That is true. But the inherent imbalance is still there.
Looks like it was best to take the engine out even knowing it needed it, be much better to work on in the shop. Tractor sure came in handy. How's the garden growing in the glass house, I hope it is feeding you guys well. Safe travels.
Wow that baby's heavy. If you have to do thatevery week you might want to check the sidewalls on your tractor tires make sure they're stiff enough
Is this the result of high miles, poor service, or neglect? You get good use of the New Holland tractor. Good work keeping those old Detroits rolling.
Love the channel! Could you possibly do a video on the pros and cons of an in frame vs out of frame overhaul. We’ve never really seen an out of frame and what it would take to do it. Seems it would be easier to rebuild out of frame.
You did a a bit of a video on it years ago but didn’t really go into what’s involved.
Love it, keep up the good work.
WIth these 'slide-out' engines yes, other bus designs can be a lot more work.
keep the clips coming
Wow that one is a mess but I know you all will get it back to where it needs to be :)
I think that most V8 engines should have cylinder liners like the big diesel engines have to simplify rebuilds- very nice tractor.
In theory that sounds good. But, they would add a lot of manufacturing cost and weight. Not to mention that the automakers would rather you junk your car or truck and get a new one instead of rebuilding it!
Those big Detroits were not mass produced on the scale of Chevy, Ford, and Mopar V8s.
Soon as I saw those liners and pistons that engine needs to be pulled out for a out of frame. Wonder what the difference is in labor is for a in-frame vs out of frame rebuild? Scott will make it A+ again.
I'm sure they all start inframe, until they find something that causes them to pull the whole thing
well, that's a mess. But these old Detroit's keep on going.
Man O man, what a job
Great videos! What is an all around better better for the late 1980’s era? Prevost or MCI? Biggest fear with a MCI of said era is the cooling system, why on earth did they use such a design?
I had no idea the whole engine just slides out on rails like that. Makes removal pretty simple it seems
How much is a power pack set these days ? Piston, rings, liner and bearings ?
Front tire test... looks like the hydraulics are smoother on the new tractor..
That sick errr, ummm six cylinder engine needs it's last rites read more than an overhaul.
Now is a good time to wash the whole engine down!
If you ever get a bus that's low on power and can't make it up the hill with an Allison automatic, have them back up the hill because reverse is a much lower gear ratio.
I feel bad for the owner, chipped timing gears are just a sign of things gone wrong a long time ago. At least the heads are find and maybe it was for the best it came out from the frame. The New Holland needs some better counter weights in the back to shift the center of gravity. You can buy front weights and stack them into the back to balance out the machine. I don't know how much they may cost from the dealership.
Somebody forgot to change the oil on a regular basis and definitely didn't keep the air filters clean with all that scoring on the sleeves!
I’d like to know what the oil pressure was before the rebuild vs afterwords.
Makes me wonder. Did they throw it(engine) together from whatever they had to get a whole engine?
Nice
Sticker -- If you can't see my mirrors its because of the smoke!
I would bet that under magnaflux/crack testing both heads are riddled with cracks. That is a seriously worn, beat to hell engine. Broken timing gears are very unusual in diesel engines.......normally the only thing that can break teeth is a piece of metal debris getting into the mesh ?!?
Ouch...😬
Warn out ,$$$$$$$$$ it’s in good hands
I am considering purchasing a 40’ 1996 Prevost no-slide bus conversion. I haven’t learned which DD engine it has, but can you advise what your favorite DDs are and any I should avoid from that era? Thank you,
Get some bolt-on rear wheel weights for the tractor.
New motor time
Surprised the liners aren't broke with hot i looks like it got.
Will the big end of the rods get resized?
I hope the underneath is not all black and oily from the air box drains
Good evening everyone
boy did they get suckered into a bus with engine assembled of garbage leftover parts. that make me wonder about the whole rest of the bus! 🤯
Cooked at what point dose it become a out of frame?
When does it get to the point where you tell them the engine needs to rebuilt?
Oh boy! You'll need to add weight to the back of the tractor to pull a V8 or a V6 with a bigger transmission behind it. I was wondering if you could feel the rear wheels wanting to leave the ground over the uneven ground?
Get some air in those front tires on the tractor...
Rings not rotated, mismatched piston rod caps, camshaft sloppy, serious streaking in the sleeves, overheating indications. The mechanic who did the last in-frame was an idiot. Best check absolutely everything now that an in-frame is no longer an option and fis all of the accessories like the air pump and generator. I feel sorry for the customer, this is an expensive result.
Honestly seems like it's easier to just pull the engine anyways for such major work, it seems pretty easy to lift outta there
No probably 10 less hours in frame in the bus vs pulling the engine and doing the same inframe.
@@BusGreaseMonkey I stand corrected!
If i buy a school bus to convert to a schooly where do you get bus parts out on the road? Same place as cars or where ?
What was all that pink stuff on the deck of the block at 4:00?
Is that a total engine rebuild? What does something like that cost?
Looks like a lot of work…
Poor old things had a hard life. Not gonna be a cheap repair. Find a salvage motor?
I wonder who mismatched the engine bits first time round. Kinda makes you think that maybe the timing gear was not in the best of health back then.
Scott, besides rear wheel weights an easy way to make a counter balance for your tractor is take a 55 gallon steel barrel and fabricate attach points through it for the 3 point hitch and then fill it with cement. Now you have an easy way to add or remove weight from the tractor
Just about at the limit of the front tires>>almost squashed flat on the rims.
Poor oil pressure? Mixed up con rod caps? Air leak on inlet side letting unfiltered air in? There is a lot wrong with that engine! Good luck with it!
Phil
You might want to run dye penetration test on heads…
👍👍😎💪💯
Looks like a lot of dirty air and dirty oil got that one
Do you still work on 6V92 TA SILVER?
Have Grease Monkey do it the first time or more than likely you will be paying him to do it over.
I thought things like annual emissions tests meant engines didn't get that bad before an overhaul?
It's probably sacrilege to even suggest, but how much work would it be to swap in a strong 4-stroke like a 60 series?
A used engine?
He's got a used engine right now
A large inline-6 won't fit in the space of a V6. Also, a Series 60 would need a different transmission and/or rear axle: it doesn't want to run at 2100 RPM all day long! The Series 50 was a better candidate to replace 92s, but it's also out of production just like the 60.
Soon fix it ,only about a thousand bucks a cylinder 😊😊