Re: o-ringed block - Saab 900 Bulletin Board - Saabnet.com
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Re: o-ringed block
Posted by Craig [Email] (more from Craig) on Tue, 12 Feb 2002 23:14:31
In Reply to: o-ringed block, ade, Tue, 12 Feb 2002 22:29:32
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Howdy from the 9k board,
You O-ring the block to install a copper head gasket. The copper is good in that it is much stronger than standard materials and is far less likely to blow out under very high boost conditions (read a highly tweaked engine.) However, without o-ringing the block the three pieces of metal (head, gasket, block) tend to slide around, especially as the materials tend to contract and expand at diferent rates. This naturally causes problems. O-ringing basically involves maching circles around the cylinders for an extruded part of the gasket to fit into. It's a specialty machine shop task, and basically requires the engine to be disassembled.
Hope this helps,
Craig
posted by 152.16.2...
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