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Old 08-30-2002, 07:20 PM
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sixto sixto is offline
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Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,743
Do you mean the horseshoe seal between the timing chain cover and the head or the gasket between the timing chain cover and the block? In either case, you change it as often as it bothers you. Mine has been leaking for over two years and I continue to ignore it. My apologies for the stupid sounding answer, but there is no prescribed time interval for replacing these items.

Sixto
91 300SE
87 300SDL
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