5.3 stage 2 heads.....Gasket question.
09-22-2009, 07:32 PM
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5.3 stage 2 heads.....Gasket question. I just read this:
"Both of these engines share a common aluminum head with 71cc chambers.. The 12559862 casting was used from '99-'04, but the 12561706 showed up on some engines in '04, too. The 862 casting came with and without the recess on the edge of the deck surface, so rebuilders need to make sure they use the right head gasket when installing one of these heads."
Anyone heard of this? I am putting these on a 04 GTO......So I assume I cant use the stock MLS gaskets then? Thanks guys...
"Both of these engines share a common aluminum head with 71cc chambers.. The 12559862 casting was used from '99-'04, but the 12561706 showed up on some engines in '04, too. The 862 casting came with and without the recess on the edge of the deck surface, so rebuilders need to make sure they use the right head gasket when installing one of these heads."
Anyone heard of this? I am putting these on a 04 GTO......So I assume I cant use the stock MLS gaskets then? Thanks guys...
