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M35A2 engine flush

97
39
18
Location
South bend,Indiana
Good evening, I bought my deuce 2 years ago and not knowing how long it sat for or what maintenance was done to it. When I bought it I changed the oil in it and was curious about doing an engine flush for my next oil change. I wasn't sure if anyone has done it before, what products they used and if they saw a big difference from it?
 

Karl kostman

Well-known member
Steel Soldiers Supporter
2,283
836
113
Location
Fargo ND
Rollingthunder thee are a number of products out there that claim they do exactly what your wanting, I have no idea if they work or not? My suggestion would be to run the engine so its fully up to temp (from driving) and just pull the plug and dump the oil while its hot (OF COURSE BEING VERY CAREFUL) I would say that your going to get out anything that pose any kind of issue in the future. Then change filter etc. as per the book! I did flush my cooling system on my Deuce when I got it because it seemed to take longer than I thought to cool off with the engine idling I took it to a Caterpillar dealer and they did it I believe it cost around 200.00$, in the end I think it resulted in piece of mind as opposed to a huge temp drop.
Good luck with the new Deuce and enjoy they are great trucks!
 

fleetmech

Well-known member
197
374
63
Location
Connecticut
I've used Marvel, Rislone, and Diesel fuel all with good results in engines over the years, usually in cases of obvious neglect, or chasing the notoriously bad hydraulic lifters in Packards. That being said, I don't think any sort of flush is necessary unless you see signs of a major buildup issue in the engine. All reputable engine oils these days (and most of the cheap ones!) have quite a lot of detergents in them which clean internals quite well without additives. If things look reasonably clean under the filler cap, I'd say keeping up on your oil changes with a good quality oil should do ya fine.

If you feel a bit of cleaning would do it good, run it up nice and hot, dump a few quarts of diesel into her, idle for a few more minutes, then drop the oil nice and hot and really let it drip drain for as long as your patience holds. It goes without saying, I suppose, that new filters should be installed too, since any gunk that gets moved is going right into them.
 

V8srfun

Well-known member
417
524
93
Location
Altoona pa
My opinion is there is no need to (flush) a engine unless you are trying to deal with a known issue. Like mentioned above atf does wonders on stuck hydraulic lifers but we have solid lifters so that is a non issue. I would say you will be better off changing your oil and filters on time and skip the flush.
 
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