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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: what should i do to an engine before i put it in my car?
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Tue, 15 July 2003 12:09
 
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whoa, cryofreezing the block and pistons??
afaik cryo treatment works for parts that have been quenched and tempered, such as gear teeth, by helping transform the retained austenite that is metastable after the quench process (and is not transformed by the tempering).
afaik, it has no effect on cast iron or on aluminium, since the block is not heat treated (apart from a solution treatment when it was made), and pistons if anything are aged to give strength. but i can do a journal search for you if you are really keen.
i think there are also issues with the effectiveness of the cryo depending on length of time after heat treatment of the parts, but i will need to check on that.
a good port smoothing can help, but apart from using all new bearings, checking tolerances, getting all reiprocating and spinning parts balanced and possibly getting the rods shot peened.. you should have few probs.
Cya, Stewart
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