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Re: Wrist pins turn in piston
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Posted by Owen Aaland on July 07, 2007 at 19:22:05 from (65.165.246.40):
In Reply to: Wrist pins turn in piston posted by Gary Rose on July 07, 2007 at 16:10:51:
If you have aluminum pistons with full floating pins they need to be able to turn in the rods. In cold weather the pistons will contract enough that the pins will be siezed in the pistons. If they cannot turn in the rods you run the risk of breaking the pin bosses out of the pistons in these conditions. A full floating pin should have about .0002 clearance in the rod at room temperature. The fit can be checked by coating the pin and bushing with 30 weight oil. Insert the pin in the bushing. Hold the rod so that the pin is verticle and it should slowly drop out of the bushing. If it does not move it is too tight. If it drops right out before it is verticle it is too loose.
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