5.9 Cummins piston ring problems? - Page 2

DixonM · 09-06-2020, 02:59 PM

Got the short block in before the rain came down try and work on it a little more tomorrow if I have time.

Booyah45828 · 09-07-2020, 09:32 AM

Good to see you're making progress.

DixonM · 09-08-2020, 03:57 PM

Took off early today got the new motor mount bolts and tighten down the motor and installed the transmission next up is the converter bolts then the cylinder head.

DixonM · 09-09-2020, 08:38 PM

Pulled the transmission pan tonight to replace the internal filter and refill with transynd fluid was quit happy to see how clean it was inside the trans. You would never have guessed it had 250000 miles on it. The rear diff fluid was pretty clean also when I changed it. The rear diff holds 2 gal of gear oil I used lucas synthetic 75-140. Still pushing on with it. LOL

DixonM · 09-13-2020, 06:24 PM

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Got some of it done this weekend I thought I would have it running but no such luck. While cleaning up the rocker arms I found three rockers that the ends came off of the tip the manual says that’s a no go so tomorrow I will order some new rockers to finish it up with. I did drill and tap the exhaust manifold and install the pyrometer pick up and have all the injectors in and the rest of the valves are set.

cadillackid · 09-13-2020, 08:00 PM

lookin good!!!

your trasns v ery well may not be the original build.. a lot of busses end up having their transmissions overhauled at least once while the school's have them.. school routes with constant start and stop, up and down shift wear the clutches out on automatics so they end up rebuilt..

DixonM · 09-15-2020, 09:20 PM

Also installed new boost and EGT gauge.

DixonM · 09-16-2020, 09:46 PM

Bad day was putting in some time on this job early this morning and I dropped a bolt and can not find it the sad thing is I had just pulled the shop towel out of the hole for the breather and I can not say for sure that it didn’t fall into the gear train so this weekend I will have to pull the trans and the back of the motor apart to make sure the bolt is not in there. It’s the bolt at the back of valve cover and you can see the shop towel below it

DixonM · 09-20-2020, 08:21 PM

I found the bolt had to remove the flywheel housing and it fell out

cadillackid · 09-20-2020, 08:38 PM

yep!! done that one before and it sucks!! dropped a nut into the carb one time on a chevy.. it pinball-machined just right so that it went through the carb (thr throttle was wide open as i was adjusting the mechanical secondaires and the nut was for the linkage..).. down into the intake and gone..

had to pull the carb and the intake manifold as it went to the runners so I couldnt snag it wit ha magnet.. luckily the intake valve was closed so I didnt have to pull a head.. just the intake..

DixonM · 09-26-2020, 02:35 PM

Worked on the box this week thought I would have it up and running before the weekend but found the radiator was in bad shape when I went to install it. The lower tank was not looking good on the crimp due to corrosion had to order a cheap ebay unit installed it last night and busted the motor off for a minute. Today I did all the little things like installing the air cleaner assy. and just giving everything a good once over this truck took 4 gal of motor oil, 7 gal of coolant, 2 gal of rear diff oil,1 gal of power steering fluid and 5 gal of transmission fluid did not think it would stop lol. Took it for a 100 mile round trip ran great no oil leaks and oil still looks new after the trip.

DixonM · 10-21-2020, 09:10 PM

Well I have driven it a little over 1200 miles all looks good and its averaging 12 mpgs changed the oil at 500 miles and its still clean.

DixonM · 03-22-2021, 08:44 PM

Put 7100 miles on her and still running strong.

magnakansas · 03-22-2021, 10:40 PM

Nice to hear when things work correctly. Cheers!

william

52Flyer · 03-22-2021, 10:54 PM

Great post @DixonM Thanks for sharing

DixonM · 11-09-2021, 01:39 PM

Well so far right at 16,000 and running great hope the trend keeps moving along.

PorchDog · 11-11-2021, 12:50 PM

We have had two instances where a 5.9 common rail failed in a Dodge 3/4 ton pickup, with a lot of miles-- over 250,000, and we bought a remanufactured engine from LKQ, and it ran less than 10,000 miles and holed a piston, and we junked the truck.

Looking back-- I would say that we had a dribbling injector that caused both of these issues. We probably did not dig hard enough into the reason for failure. I would say that this is a downside of common rail injection-- with all that fuel pressure present all the time-- if an injector leaks/sticks, or whatever-- you can be overfueling and might not catch it. We had drivers in the truck doing deliveries-- and if it cranked-- it was "good to go" as far as they were concerned.

Having said this-- we have three 12 valves with over 450,000 miles, and no work done to the injectors or the pumps. (Well, throttle position sensors and throttle linkage stuff....)

cadillackid · 11-11-2021, 03:05 PM

Quote:

Originally Posted by PorchDog

We have had two instances where a 5.9 common rail failed in a Dodge 3/4 ton pickup, with a lot of miles-- over 250,000, and we bought a remanufactured engine from LKQ, and it ran less than 10,000 miles and holed a piston, and we junked the truck.

Looking back-- I would say that we had a dribbling injector that caused both of these issues. We probably did not dig hard enough into the reason for failure. I would say that this is a downside of common rail injection-- with all that fuel pressure present all the time-- if an injector leaks/sticks, or whatever-- you can be overfueling and might not catch it. We had drivers in the truck doing deliveries-- and if it cranked-- it was "good to go" as far as they were concerned.

Having said this-- we have three 12 valves with over 450,000 miles, and no work done to the injectors or the pumps. (Well, throttle position sensors and throttle linkage stuff....)

not cummins related but dribbling injectors have Nuked more than on International HEUI engine.. one of the few things that would take out a 7.3 (T444E).. ive drained an oil pan that was more like a fuel tank.. and the blow-by tube was a built-in Mosquito fogger..

PorchDog · 11-11-2021, 03:31 PM

Good reason to pull that oil stick out as a pre trip check every day. If is smells like fuel or is over full-- something is going on.

cadillackid · 11-11-2021, 03:43 PM

Quote:

Originally Posted by PorchDog

Good reason to pull that oil stick out as a pre trip check every day. If is smells like fuel or is over full-- something is going on.

yeppers indeed!!! the oil speaks volumes about whats going on in an engine.. as does the exhaust... a little black smoke when foots to the floor is pretty normal but those little wisps of white smoke at idle are telling of partial burned fuel..

I remember the dude.. he was funny.. his 7.3 left a pretty decent oil spot on the ground esp when parked overnight (as many do).. "its not oil.. I never ever have to add any... it must be fuel or tranny fluid or powered steering fluid"..

'do you have to add any of those?' 'Nope never'...

I was over at his house about 6 months later helping him pull the engine for a rebuild..... that was one way to fix all his 7.3 oil leaks.. "and upgrade his injectors"

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