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johncmng's Avatar
 
Join Date: May 2006
Location: San Jose, CA.
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cleaning pistons and cylinder

They are very heavily greased and difficult to get off. What is the best way to clean the pistons and cylinder. Can I use something like simplegreen and hot water?

Thanks
John

Old 11-11-2006, 09:19 PM
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I would think about taking them to a decent machine shop. They would do a really good job.
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Old 11-11-2006, 10:03 PM
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there were some threads on this on the engine bbs...some chemicals...soaking overnight and all comes off easily
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Old 11-12-2006, 06:34 AM
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Re: cleaning pistons and cylinder

Quote:
Originally posted by johncmng
They are very heavily greased and difficult to get off. What is the best way to clean the pistons and cylinder. Can I use something like simplegreen and hot water?
Thanks
John
The pistons are INSIDE the cylinders.
What are you cleaning?
Just the outside (Fins) of the cylinders?
To get the cylinders off, you'll need a long 10mm Allen for the barrel-nuts.
Are you dismantling the engine?
If so, take everything apart and bring the parts to a shop that has a parts washer, you'll like it!
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Last edited by Gunter; 11-12-2006 at 07:03 AM..
Old 11-12-2006, 06:59 AM
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I disassembled the cylinder and piston. The piston are very dirty, lots of carbon buildup on the top and lot s of gunky oil deposit on the rings. Some of the oil deposit on the ring has been caked on and is difficult to remove. I don't want to use a screw driver on it, but a plastic card or brush is not hard enough to scrape it off. I've use brake cleaning spray on it to take off the grease but, no use on the hard stuff.

Thanks
John
Old 11-13-2006, 07:50 AM
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berryman's chem tool and a stiff nylon brush. Let the tops soak in over night (actually a few nights makes it easier) keep all your pistons and cylinders numbered so you keep them together and in order.
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Old 11-13-2006, 08:09 AM
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Take them to a machine shop. For cheap they'll give you parts that are clean as new.
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Old 11-13-2006, 08:54 AM
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John:
Machine shop is your best bet.
Not only will they clean the stuff, they'll check to make sure that the P/C's are in spec.
Very often, the land for the first ring gets hammered and becomes too wide. If that happens, you'll have to make a choice.
If the cylinders are Mahle (Nikasil) and in spec, you can go with new JE pistons.
I hope you don't have KS (Alusil) P/C's.

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1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD!
1995 seafoam-green 993 C2, LSD, Sport seats.
Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ".
Old 11-13-2006, 09:04 AM
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