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cleaning crankcase

A

a49deere

Member
Any ideas on how to clean sludge and stuff out of a JD B crankcase without tearing down, want to give it a quick Douche before I put new oil and filter on it. thanks
 
If you drained it while hot and let drain overnight it will be about as good as it will get. Put your new oil in run for a shorter period and drain and change oil and filter again is about the only way I know.
 
Drain about half the oil, top off with diesel fuel. Start it and let it idle for 10 minutes. Do NOT rev it. Drain it and change the filter and refill with fresh oil. I have done this and had no damage to the engine. I repeat, doNOT rev the engine Sam Womer(PA)
 
I drain what I can then dump diesel through the top of the motor let that drain then add oil and diesel run a few hours drain again
 
Been so long since I looked in the owners manual but I think there are flushing directions in it and it does not includ diesel in them.
 
The plate you take off to get to the connecting rods/crankcase. Either tin or case depending on year.
 
How bad is it
cvphoto153650.png
 
I bought a '88 year model Ford 3910, 3 cyl 50 hp in an estate sale a few years ago. Owing to the fact that it was an estate sale I imagined the owner put few hours on it in later years since it only had 900 original hours and the Proofmeter was functioning...modern day dash assembly which I easily replaced due to discoloration.

My first oil-filter change started in the usual manner and new oil turned black immediately.......Hmmmmm! Drained the oil and stuck my finger in the hole and felt about 1/4 of sludge. Put in new oil-filter and added a 16 oz. can of Sea Foam. Cranked it up and let it run at about 1k RPM for half an hour sitting still.

Drained that and felt the pan and the sludge was gone. Re filled with new oil-filter and I got clear honey colored oil after I cranked it and running it a few minutes.
 
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