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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: Copper head gaskets Wed, 19 May 2004 06:33 FWDboy wrote on Thu, 06 May 2004 13:48 btw - I can't confirm this, but I'm not sure if annealing is necessary or a good idea? It may soften the material while it is warm, but if the gasket isn't perfectly cool when it is put in a) the tension will be wrong due to thermal expansion and b) the sealing material will have to thin/spread out when the gasket cools. annealing is the process where you heat a material up to a high enough temperature that recrystallisation occurs. What it basically means for us here, is that when you tighten a copper head gasket, and squish it, you introduce work hardening. annealing reduces the work harening by recrystallisation and grain growth (initially by allowing the dislocations to move out of the material) resulting in a material with lower strength, but higher ductility (returning it's malleability ) you NEED a soft copper gasket so that it conforms to the head and block irregularities when you torque it down... Cya, Stewart [Report message to a moderator]

	Subject	Poster	Date
	Copper head gaskets	Syc02T	Tue, 04 May 2004 02:16
	Re: Copper head gaskets	3t-RA40	Tue, 04 May 2004 03:20
	Re: Copper head gaskets	ta22gt	Tue, 04 May 2004 04:09
	Re: Copper head gaskets	barned01	Tue, 04 May 2004 04:38
	Re: Copper head gaskets	MR. 2	Tue, 04 May 2004 06:51
	Re: Copper head gaskets	RWDboy	Tue, 04 May 2004 07:18
	Re: Copper head gaskets	Syc02T	Thu, 06 May 2004 03:12
	Re: Copper head gaskets	RWDboy	Thu, 06 May 2004 03:42
	Re: Copper head gaskets	RWDboy	Thu, 06 May 2004 03:48
	Re: Copper head gaskets	oldcorollas	Wed, 19 May 2004 06:33
	Re: Copper head gaskets	Syc02T	Wed, 19 May 2004 06:42
	Re: Copper head gaskets	Syc02T	Wed, 19 May 2004 02:26
	Re: Copper head gaskets	kingmick	Wed, 19 May 2004 06:14
	Re: Copper head gaskets	celicaboy_2000	Wed, 19 May 2004 07:31
	Re: Copper head gaskets	YelloRolla	Wed, 19 May 2004 07:47
	Re: Copper head gaskets	kingmick	Wed, 19 May 2004 10:32
	Re: Copper head gaskets	Syc02T	Wed, 19 May 2004 12:38
	Re: Copper head gaskets	oldcorollas	Wed, 19 May 2004 14:21
	Re: Copper head gaskets	YelloRolla	Wed, 19 May 2004 12:56
	Re: Copper head gaskets	ed_ma61	Wed, 19 May 2004 12:59
	Re: Copper head gaskets	Syc02T	Wed, 19 May 2004 13:26
	Re: Copper head gaskets	3t-RA40	Fri, 21 May 2004 02:20
	Re: Copper head gaskets	EVOSTi	Sat, 22 May 2004 09:57
	Re: Copper head gaskets	Syc02T	Thu, 27 May 2004 03:58
	Re: Copper head gaskets	dcving	Thu, 27 May 2004 23:34
	Re: Copper head gaskets	Syc02T	Fri, 28 May 2004 04:27
	Re: Copper head gaskets	Syc02T	Sun, 06 June 2004 09:49

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