actually, the opposite may be true. I just went through this with an antique engine I am working with. my machinist had installed customer provided custom aluminum pistons in a big very old liquid cooled car engine. the clearances were too tight and they seized. I was considering replacing my cast iron piston with aluminum and was advised by another machinist who works with them to allow extra clearance at the top for piston expansion. he mentioned 2 thousanths extra above the rings. he made a piston once for a similar engine that started getting tight when hot and that fixed it.
this is from a guy who makes his own crankshafts from steel plate! (including twisting them) On Fri, Mar 10, 2017 at 8:12 PM, brian.kraut--- via KRnet <[email protected]> wrote: > I know that one of the major advantages to liquid cooled engines is that > the pistons and cylinders are made with much smaller clearances because > the temperature of the engine stays relatively constant so less > expansion and contraction with the different metals. > Search the KRnet Archives at > https://www.mail-archive.com/[email protected]/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to [email protected] _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/[email protected]/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to [email protected]
