I am in the process of rebuilding a 97 Vortec 5.7 to put in my 87 Wrangler. I was wondering what coating I should put on the pistons after I fit the rings.
I saw the video when the machine shop coated the pistons and cylinder walls with wd-40, but you also said that is ok for a short time. I still have a decent amount of work to do before I will be able to put the engine in the vehicle so I can start it. Would the Wd-40 be ok or do I need to use something else?
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