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Them tracks need adjusted

Great info, thanks you.

that cat has a thing for me LOL

I have worked on marine diesels since the late 80's, mostly MAN, Cat, Cummins, a few Komatsu. We have one customer with Cat mains in a push boat that has 3-71 gensets. The guy that did any 2 stroke work left, the work is scheduled, and they want me to do it. I have no issue with that BUT they want an in frame done in four or five days. That is the part I do not like. We have a rebuilt head, injectors and oil cooler from Detroit, and three kits from Interstate McBee. I'm freinds with the guy that was supposed to do the work and he says he will walk me through it. The only part I am hesitant about is fitting the liners. It is an NA 3-71 and my bud says on the low HP stuff "if it fits run it" on the higher HP stuff like the high HP turboed stuff liner fit is more critical. This thing runs at 1800 RPM on a 30kw gen that spends most of it's life slobbering and lightly loaded.

I’ve got a 4-53 that will blow 2 gallons out the exhaust in 20 minutes

I am a mechanic with 30 years of experience in these engines and even on the island where I live we have many marine engines and I continue to repair them, what the video says is true and another problem is that the spare parts no longer exist.

I have seen x head pistons in as early as 1969.

I just assumed that DD engines were supposed to have a mess of old oil grunge in the airbox since every one I have ever seen was like that.

This has been a known problem with the crosshead type pistons of Detroit Diesel engines ever since this type of pistons was used. From memory, that was already the late 1970s. In the Netherlands, tests were carried out with rubber seals by mechanic Piet Brokx (RIP) from Shipyard De Haas in Maassluis (SDMM department), who solved the problem. In my opinion, this should have been known to Detroit Diesel specialists for a long time..

Dumb question but which way does the rod go in on a 71 series? Rebuilding my 3-71 and forgot to mark which side of the engine the numbers on the rods/caps were facing.

What's the purpose in running it against the governor at no load to break it in it has to be under load like 80% or it will just glaze the rings and liners

Set your governor gap, that'll take care of the idle surge.

i was retired from trucking & repair & my relation has a boat with one those in it! it was forest wood! I was adopted & father mother unknown but the uncle saw my real father ( by court dealing over my adoption he worked for woods company on boats I about I found the factory was ranger boat company!) the uncle gave me a book & said here use this to fix the diesel engine! my ex ran off after I not gonna have fun! well with baby fun not what your looking for! they the 2 stroke all lope a little at idle! even 4 stroke ones do it the beast they are! i had v6 92 tt it ran away & the fire cost me my job! the place burned to the ground! the place was a moving company it had mainly light loads & not real big engines needed like v8 but gas or strait 6 or v6 2 stroke is a GM type ps that who owned the engine design! i found out in court lawyer talk! they knew it would run away & not shut off! run off its own oil! i ended up working for a GM supply place! my job was on line both ways! what i said and saw the day of the fire! or 4 stroke mack or other brands & gas jobs too! they rebuilt but the place went out like 15 years after or more!

Ahhh yes, back when Autocar was an independent US company, not a trim package for a Volvo...

Free from emissionnonsens.

Sweet!!

Wow, very cool. Don't stick your finger in there!

This is really kewl!

The cylinders just slide right in. What’s it take to pull an old one out?

And maybe a little D4H cat sitting there too. I’ve got some videos running one of those. Great machine.

Motocross track?

I don’t know what kind of oil is in my truck. I bought all the 40w they had at the store and plan to buy some more so I can do an oil change. But if I gotta tear it down I’d rather not dump out new oil. So I need to find the issue.

You got a subscriber! Thanks for the info. My buddy keeps saying blower seal. I’m gonna a pull inspection plates and have a look.

The best ring compressor is a used liner. Cut off below the ports to use the lower half of the liner and tapered in the lathe

Outstanding troubleshooting and information gathering. Nice work. Glad to see someone put knowledge into troubleshooting instead of preconceived ideas and folk lore.

An aluminum ring compressor is a poor choice because it's soft

There's an update on the expanders that the points go down

If you oil the piston skirt where the retainer goes it will always work unless there's something wrong with the skirt or the retainer

Thanks for posting that, I found it very interesting

This in rivesville wv?

How’s the machine been treating y’all? How many hrs? Looks great