Posted by dieselpaul on February 22, 2008 at 21:18:06 from (209.240.206.204):
In Reply to: Gasket fire rings? posted by 37 chif on February 22, 2008 at 20:43:24:
I believe all gas/diesel engines have a so-called 'fire ring'. this is nothing but the metal crimped onto softer head gsk, in such a way as to surround the cyl. where the 'fire' is. on overheated gas engines, the crimped part can pull loose from the rest of gsk, [it's gotta go into combustion chamber]--''sucked the fire ring'' running engine after that will burn metal crimp--it's now inside the chamber instead of tightly pressed around--now fire will get to softer non-metal material, will burn out very quick. my ref. to 'fire ring' on detroit diesel is differant than most in the fact that the ring is all by itself-it fits on top of each cylinder, it isn't crimped to anything. the block is machined to accept rubber rings to seal water/oil ports,head outer edge, so a head set is a bunch of pieces, instead of a head gsk. that you are used to. well, thats my idea of a fire ring. keeps the fire inside the combustion chamber.
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