Note that to anneal a copper head gasket for reuse, it should only be heated to a DULL red, then AIR cooled - not quenched. Quenching is used to HARDEN metals, not soften, although copper does anneal reasonably well with quenching, unlike most metals.
After cooling, using a scotchbrite or similar abrasive pad (NOT steel wool) to clean off the black stuff and get to a shiny copper colour. Then a very thin coat of RTV silicone on both sides (enough to just be able to tell it's there, no more) and it's ready to go.
Any kinks or big dents just bin it.
And three times is about the maximum.
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Grant Johnson
Seek, and ye shall find.
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Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
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