You asked if we wanted to see you take the valve cover/head off. Dude. I want to watch you eat spaghetti. I promise I would learn something from that. Your intuition and thorough descriptions of what you're doing is beyond compare. Keep it up!
I drive the same model truck at work, mine is a 2011 F-750 with a 6.7 cummins and an Allison auto... I love it!!! Only thing that ever gives us fits is the stupid DEF system on it.
I have heard that same sound on other Diesel engines and it turned out it had a bad cam shaft. The Crome broke of the face of the lifter and destroyed the cam lobe. It would really interesting to see what happened to it. Keep up the good work J c. Look foreword to seeing more in the future.
I worked at a cummins dealer as a tech for 6 years. could be worn cam or broken bridge across the valves but most of the time a bent push tube or a missing e-foot of the rocker arm was the cause. could even be a botched valve lash adjustment where someone didnt torque the nut on the rocker arm properly and it backed off. most likely the exhaust valve side is where the problem is.
Common problem with the isb engines is they will break valve springs around 200k, we replaced all the valve springs in the rest of the fleet and we have some with 350k on the ticker
That happens all the time on our fleet. The lack of overhead maintenance the rocker backs off. That one sounds like the exhaust rocker backed off and most likely bent the intake push rod.
I had this issue on some smaller lawn tractor engines and on the teardown showed the exhaust push rod was bent. This prevented the exhaust valve from opening and when the piston came up on exhaust stroke, it wouldn't release the exhaust and that high pressure from the exhaust stroke will suddenly exit through the intake valve as soon as they open. Causing that popping from the intake.
Heck Ya tear it down and check it out that's the best part of your Videos watching you tear something down and fixing it and making it look so easy when people like me would have said hell no I'm not trying that it's above my PAY GRADE
I knew you could do it ! I had all the faith in the world you would get it running! An old guy told me once there's too many moving parts in those 24v motors and the valve train had a tendency to crash!
I vote to have a look see and see what the issue is, mind you I am one of those people who always wants to see if a engine can be saved, cause thats money in your pocket if you dont have to get one and if you ever want to see it as long as the fix isnt worth more than the engine would be, then you know someone will buy that... there aint no doubt about it.. When ever I see trucks that are non runners or fleets trucks that havent been used, I always try and go in with a worse case scenario in mind, this way I am not surprised if its has been scavenged upon... Nice work on finding your wire issue on the no start, sometimes it is the little things that just need to get traced down to get things working. Look forward to the teardown if you do it.
Tear down time. Almost sounds like a 12 valve with a bad injector. The sound coming thru the computer speaker makes it sound like it got a rod knock, but since the medium Cummins makes like 210 horse power, the rods are safe for another day.
JC first video I’ve seen from you, great stuff! I have an ‘09 Blue Bird school bus I’m considering pulling the 6.7/Allison out of and stuffing in an ‘01 2WD Chevy 2500HD that had the 6.6/Allison. Knowing little about Cummins medium duty engines, the rear drive accessories info is great!
@@j.c.smithprojects wrap it around and hook the chain so it cant slide all the way off and i like to put the extra on the front of the load. It help resist the wind
Really enjoy your video, simple and too the point. I just started watching and also subscribed. Can you tell me if you break even on these salvage trucks or make any money. I have done it with other cars and trucks, just not the bigger stuff. Either way I plan on watching your other stuff. Thanks
Broken intake valve spring. Retainer probably came off and it's bouncing off the Piston and the seal is the only thing keeping it from falling down the hole
I used to have diesels that ran all day long with no WIRES or batteries. Push start,No lights, mechanical gauges, gear driven injection nothing electric at all. So the three wire thing seems unimpressive if you've had old diesels.
I had one drop a intake valve at 12k back in 07 on a megacab ram, was cylinder 6 furthest valve back, valve was hammered rt into head, cummins replaced it all sounded the exact same as yours
Now I call this must know info and I'm impressed cause that can be reversed to other applications. I don't know how you learned this cause I had to quit wrenching just when things were getting interesting. Long story short, I'd like to find out what caused it to push that much oil into the airbox. Thanks for sharing this... U just got yourself a new subscriber. I know about fly by wire and some of it but that is something I've never seen done before!!!
Did y’all hear this dude?!?! Would anybody be interested in watching him tear down this Ford Cummins. Smh ah yeaaaa buddy I wanna see and so does everyone else. Oh I see he made one
I love it. I'd like to see the repair video. Is that a common problem for them? One last question, Are you self taught or did you go through schooling? Thanks for another great video sir.
the repair video is up now. the reason for the failure on this engine was likely technician error....unfortunately this happens far too often. i learned by doing. tear it apart and see how it works.
Could you tell me which wires exactly to get it running ?i would appreciate it alot , have one im trying to figure out which wires need to go where to get it running .
The only thing that stops this type of diesel engine from running is no fuel getting to the cyls. The only thing that needs a electricity to make this diesel run is the shut-down solenoid and of course the starter. You also have an exhaust valve not opening causing that popping to occur in the intake. That's my initial guess.
Not true. this engine is a common rail system with electrically fired injectors that are controlled by the ecm....it takes a whole bunk of wires and sensors to make this one run.
i was originally just going to "dismiss" the engine as bad and take of some known good parts but i wanted to see what i could verify was good. many parts were missing including the diagnostic port in the cab. otherwise i would have checked codes, done a cylinder contribution and a relative compression test with my scanner. im sure i could have rigged something up but again, i was told the engine was bad and needed replaced.
I have no clue what I'm talking about but shouldn't you just compression test it? If it dropped a valve or it's stuck open it won't be able to keep compression, telling you the exact cylinder it's in
Great video. Love your approach and the way you explain what you are doing. I am especially interested because I have a 2008 Thomas school bus with a caterpillar C7. When that thing starts to give out it will cost a fortune to fix I would rather swap it out for a Cummins 8.3 or maybe a 6.7. It's going to be rough getting those engines to play with the Allison transmission though.
not at all. your allison trans has its own stand alone computer. it only needs a few inputs from the engine ecm. these are normally standard signals. as in they are not "cat" or "cummins" specific. i know someone who does just what you are talking about. he can supply you with anything you need to get a cummins working with your allison. when the time comes, message me and i will put you in contact with him if you like.
I sure would like to see a tear down and repair videos 👍😎
I would like to see it tore down to see what’s wrong. Thanks for sharing
You asked if we wanted to see you take the valve cover/head off. Dude. I want to watch you eat spaghetti. I promise I would learn something from that. Your intuition and thorough descriptions of what you're doing is beyond compare. Keep it up!
there was another video of taking the valve cover off and finding the problem.
I drive the same model truck at work, mine is a 2011 F-750 with a 6.7 cummins and an Allison auto... I love it!!! Only thing that ever gives us fits is the stupid DEF system on it.
when can I visit your location for a more detailed Cummings breakdown/repair?
I say go for it I have not seen a repair video on this repair and thank you for doing it
Love how you can diagnose problems
I have heard that same sound on other Diesel engines and it turned out it had a bad cam shaft. The Crome broke of the face of the lifter and destroyed the cam lobe. It would really interesting to see what happened to it. Keep up the good work J c. Look foreword to seeing more in the future.
Would be a good video to make a video for the repair process
I worked at a cummins dealer as a tech for 6 years. could be worn cam or broken bridge across the valves but most of the time a bent push tube or a missing e-foot of the rocker arm was the cause. could even be a botched valve lash adjustment where someone didnt torque the nut on the rocker arm properly and it backed off. most likely the exhaust valve side is where the problem is.
I don't think I've ever seen a 6.7 Cummins up close like that. Thanks for sharing JC!
Please share, this is what we're here for.
Common problem with the isb engines is they will break valve springs around 200k, we replaced all the valve springs in the rest of the fleet and we have some with 350k on the ticker
That's crappy....
Yes, dig into it, would like to see what is causing the problem.
Please show the tear down, I really enjoy seeing what the problem is and the fix, thanks
I'd be interested in seeing what's wrong with the engine. I love watching your videos.
That happens all the time on our fleet. The lack of overhead maintenance the rocker backs off. That one sounds like the exhaust rocker backed off and most likely bent the intake push rod.
I agree with mhtractor. I also would like to see a tear down... 👍
Thanks for uploading this. Gives me some ideas I've had about swapping a 6.7 in my 86
it could make a very nice swap.
I had this issue on some smaller lawn tractor engines and on the teardown showed the exhaust push rod was bent. This prevented the exhaust valve from opening and when the piston came up on exhaust stroke, it wouldn't release the exhaust and that high pressure from the exhaust stroke will suddenly exit through the intake valve as soon as they open. Causing that popping from the intake.
Heck Ya tear it down and check it out that's the best part of your Videos watching you tear something down and fixing it and making it look so easy when people like me would have said hell no I'm not trying that it's above my PAY GRADE
Would be really cool to see a ram 5500 crew cab put on the frame
Beside the dropped valve, camshaft is wiped out also...progressive damage.
Looks like a good setup to put the International cab onto
I knew you could do it ! I had all the faith in the world you would get it running! An old guy told me once there's too many moving parts in those 24v motors and the valve train had a tendency to crash!
I am hoping it is just that the valves were too loose and let the bridge come off. then it got stuck and is holding the intake valve
You can fix anything!!! You are the man!!!!
had a 12 valve that started eating a intake lifter, it made that same thump out the intake! Only place I've ever heard this sound.
I vote to have a look see and see what the issue is, mind you I am one of those people who always wants to see if a engine can be saved, cause thats money in your pocket if you dont have to get one and if you ever want to see it as long as the fix isnt worth more than the engine would be, then you know someone will buy that... there aint no doubt about it.. When ever I see trucks that are non runners or fleets trucks that havent been used, I always try and go in with a worse case scenario in mind, this way I am not surprised if its has been scavenged upon...
Nice work on finding your wire issue on the no start, sometimes it is the little things that just need to get traced down to get things working. Look forward to the teardown if you do it.
Absolutely. Tear it down, lets see whats broke inside.
Tear down time. Almost sounds like a 12 valve with a bad injector.
The sound coming thru the computer speaker makes it sound like it got a rod knock, but since the medium Cummins makes like 210 horse power, the rods are safe for another day.
I have a 2013 f750 sbt that's it will exceed 15 mph while driving? any thoughts?
Love the videos JC keep em coming.
yes i would love to see what is wrong,i watch all your videos and love them
Those fords where famous! And dependable I don’t see as many power stroke on streets as the Cummins really sold
I'm in. Sounds like a valve stuck open to me, too. Be interested to see why and what caused it.
JC first video I’ve seen from you, great stuff! I have an ‘09 Blue Bird school bus I’m considering pulling the 6.7/Allison out of and stuffing in an ‘01 2WD Chevy 2500HD that had the 6.6/Allison. Knowing little about Cummins medium duty engines, the rear drive accessories info is great!
Sounds like an intake valve is stuck open
Heard that plenty on ISC's could be worn cam or rocker, excessive lash, or bent pushtube. I doubt that is severely catastrophic
Would definitely like to see the tear down/discovery process
You don't even need Manuel gauges. Just hook the laptop up and watch it all through the computer monitor‼️
Nothing to it but to do it. Let's have a look. Thanks for sharing.
that is the right attitude right there!
I'd love to see that rebuild. 1 vote here.
I do that with chains on a tarp when hauling wood chips or gravel in a trl going down the road. Holds beautifully even on the road
i never tried it like that. great idea for getting mulch.
@@j.c.smithprojects wrap it around and hook the chain so it cant slide all the way off and i like to put the extra on the front of the load. It help resist the wind
I’d like to see the teardown kind of hoping it’s just an exhaust rocker arm broke but it sounds like an intake valve.
Good show JC!
Tear into it, I'm watchin here...lol
Doug@ the "ranch"
Can't wait to see more thanks for sharing
I would like to see engine running with all wires stripped out except you bare minimum to make it work.
I had a 6.7l that overfueled a cylinder and caused head and valve damage.
Really enjoy your video, simple and too the point. I just started watching and also subscribed. Can you tell me if you break even on these salvage trucks or make any money. I have done it with other cars and trucks, just not the bigger stuff. Either way I plan on watching your other stuff. Thanks
I would like to see it fixed. my 2 cents broken valve spring.
Ford Cummins ford Powerstroke I like both I’m glad they get along great
7.3
Certainly worth a tear down. Sounds a little like a 6.4PSD with a bad intake rocker. Nice work convincing it to run👍
Broken intake valve spring. Retainer probably came off and it's bouncing off the Piston and the seal is the only thing keeping it from falling down the hole
I used to have diesels that ran all day long with no WIRES or batteries. Push start,No lights, mechanical gauges, gear driven injection nothing electric at all. So the three wire thing seems unimpressive if you've had old diesels.
I started a 12v cummins in a truck i bought with nothing hooked up and just pulled the fuel shut off and had my dad jump the starter
I would love to see the teardown.
Good video....I would really like to see you take it apart
I like all that you do for us on TH-cam. so show me the hole thing
This is very a interesting video ! Please keep going on this engine....👍
Very interesting. Please show us the tear down. Thnx
Do you have the names of the wires you used?
I had one drop a intake valve at 12k back in 07 on a megacab ram, was cylinder 6 furthest valve back, valve was hammered rt into head, cummins replaced it all sounded the exact same as yours
Now I call this must know info and I'm impressed cause that can be reversed to other applications. I don't know how you learned this cause I had to quit wrenching just when things were getting interesting. Long story short, I'd like to find out what caused it to push that much oil into the airbox. Thanks for sharing this... U just got yourself a new subscriber. I know about fly by wire and some of it but that is something I've never seen done before!!!
Did y’all hear this dude?!?! Would anybody be interested in watching him tear down this Ford Cummins. Smh ah yeaaaa buddy I wanna see and so does everyone else.
Oh I see he made one
what the heck is a ford cummins
A ford Cummins duh
any help on how you connected up the throttle, maybe a wiring diagram
I love it. I'd like to see the repair video. Is that a common problem for them? One last question, Are you self taught or did you go through schooling? Thanks for another great video sir.
the repair video is up now. the reason for the failure on this engine was likely technician error....unfortunately this happens far too often. i learned by doing. tear it apart and see how it works.
Messed up intake valve sounds like a Huey helicopter
Dude good video
I love the old 12 valves most out of all Cummins. Run them on basically anything.
Great video JC
Could you tell me which wires exactly to get it running ?i would appreciate it alot , have one im trying to figure out which wires need to go where to get it running .
Makes sense that they stripped what they wanted before they got rid of it
The only thing that stops this type of diesel engine from running is no fuel getting to the cyls. The only thing that needs a electricity to make this diesel run is the shut-down solenoid and of course the starter. You also have an exhaust valve not opening causing that popping to occur in the intake. That's my initial guess.
Not true. this engine is a common rail system with electrically fired injectors that are controlled by the ecm....it takes a whole bunk of wires and sensors to make this one run.
I have one I would like to make stand alone wondering could you help
Great video! keep them coming and ill keep watching!
Is really common for the battery feed wire to break i have two f650 and both have been the same issue before
Tear it up. I’ll definitely watch that.
Great video, would be nice to see why that inlet valve won't close. Broken spring?
Yes video repair i love ur videos i dont aleays have tome to watch libe syrean
I love watching people do projects. Sick of watching people just put parts on. Built not bought. That’s how all my stuff is.
thats what i say....the best trucks are built not bought!
I would love a ford 16 box on back of those need to be lowered but there a perfect platform
where can i get a wiring diagram for the 6.7 ? I am doing a rebody with a 1940 g56
Sounds like a broke rocker arm/bent push tube...
I would at least like to see the rocker arms...are you going to put the 60 something international cab on this frame/drivetrain
You da man J.C.!
Good job friend ,respect how to do?
When you sell trucks or truck parts do you post them for sale anywhere?
I would love to see it. Hoping it's something simple for you.
the repair video is up john.
@@j.c.smithprojects Thanks J.C. I'm getting ready to watch it.
A scope would help with a relative compression test to see which cylinder had the fault
i was originally just going to "dismiss" the engine as bad and take of some known good parts but i wanted to see what i could verify was good. many parts were missing including the diagnostic port in the cab. otherwise i would have checked codes, done a cylinder contribution and a relative compression test with my scanner. im sure i could have rigged something up but again, i was told the engine was bad and needed replaced.
I have no clue what I'm talking about but shouldn't you just compression test it? If it dropped a valve or it's stuck open it won't be able to keep compression, telling you the exact cylinder it's in
I would like to see the repair
Yes interested to see the engine stripped 👍👍👍👍👍
Sounds like a T-34!
Probably just a bridge off of the valves.
Nice I have a couple projects I'm working on myself cool videos
Can you run it like that all the time? Do you have use of the throttle or the gauges like that ?
Tear it down...curious to see what the issue is internally
I'm all in!
24v- bridge came off one cylinder
Tear it down, that's what you do so well. And now we just have to know what's wrong with it.
Was the fuse box just an easy point to tap or was it used for other purposes at the time to run?
Great video. Love your approach and the way you explain what you are doing. I am especially interested because I have a 2008 Thomas school bus with a caterpillar C7. When that thing starts to give out it will cost a fortune to fix I would rather swap it out for a Cummins 8.3 or maybe a 6.7. It's going to be rough getting those engines to play with the Allison transmission though.
not at all. your allison trans has its own stand alone computer. it only needs a few inputs from the engine ecm. these are normally standard signals. as in they are not "cat" or "cummins" specific. i know someone who does just what you are talking about. he can supply you with anything you need to get a cummins working with your allison. when the time comes, message me and i will put you in contact with him if you like.