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Allis Chalmers Discussion Forum
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Allis WD questions: cleaning pistons, distributor

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Justin Squire

05-07-2006 18:36:25




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I was going to reassemble my engine when I realized it wouldn't crank anymore. It is almost completely disassembled and no electrical or ignition parts are connected anymore. It would turn by hand before, but it wouldn't today. I removed all the pistons, pushing them up through the top from underneath (The engine is still in frame). Turns out it was the #1 piston that was rusted to the cylinder. I am now going to clean the pistons, hone the cylinder walls, and put them back in. What is the best way to clean the pistons and rings. They have a lot of oil and dirt caked on, especially in the grooves. I don't have access to a piston ring groove cleaner and I was wondering if I could soak the pistons and rings in some sort of solvent or if it is just going to take time scraping the gunk out with a small screwdriver or other small tools. I have had some pretty good luck with steel wool for the outside of the piston, but I can't get to the grooves.

On a slightly different subject:
I also installed the distributor after taking the pistons out. I had the idea because I could see exactly where TDC was by the position of the crankshaft. The crankshaft is vertical, so I know that is the farthest the #1 piston can go, therefore TDC, am I right? When the crank is in this position, I also see some markings on the flywheel from underneath. I cannot make them out, but I assume this means TDC. I then followed timing instructions outlined in the manual and tightened the distributor down. Is this accurate enough to find TDC and time the distributor? Thanks.

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Henry M

05-08-2006 05:31:24




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 Re: Allis WD questions: cleaning pistons, distribu in reply to Justin Squire, 05-07-2006 18:36:25  
Speaking of renting things. If there is an autozone nearby, they usually have a bunch of stuff that they "rent". The two places I have been to charge a deposit and guve the deposit back when returned. No rental fee. That is where I got the hone for the little jd and one time I was stranded in FL with a bodacious leak on the propane on the camper and went to autozone and got the flaring stuff for their free rental.

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gene (missouri)

05-07-2006 20:32:10




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 Re: Allis WD questions: cleaning pistons, distribu in reply to Justin Squire, 05-07-2006 18:36:25  
Both valves have to be closed. So you are either at TDC or 360 crankshaft (one full turn) degrees off.



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IBorange in TX

05-07-2006 19:35:26




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 Re: Allis WD questions: cleaning pistons, distribu in reply to Justin Squire, 05-07-2006 18:36:25  
Do not use a screwdriver to clean ring grove! Get a broken piece of a ring and use that to clean the grove, but the best way is to rent a grove cleaner from your auto parts store, if you don't have one. It'll save you some problems later on. Steel wool and WD40 will work on cleaning the pistons, but better to just soak the piston in a solution of WD40 and Marvel Mystery oil and wipe the piston clean.
When you put the distributor in the slot, be sure that it is aligned with the cam and that the cam and the crank are in time. Good luck.

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