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Andy930 Andy930 is offline
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Join Date: Jun 2010
Posts: 24
Base gasket

Hi There, Im a new member to this forum and love to read and learn from the wealth of knowledge here. I often read the questions and answers to different problems. This particular problem prompted me to join. I have my own shop here down under and have been specialising in euro cars for 20 years. I have had 3 911s, modified,rebuilt and restored them. I rebuilt my 930 engine here at the shop and did all the usual performance up grades and proud to say she makes 447bhp at the tyres. I have had personal experience with your problem. It seems to be a very,very rare problem indeed. What seems to happen is the case threads wear/stretch,thus causing the stud to move and this allows the gasket to move. Once the gasket slips out the resulting movement between the barrel and head can quickly destroy your cyl head and barrel. This problem sounds like the magnesium case issue however at 30 plus years of age some alluminium cases can suffer from this aswell. It may only be one case thread but i used time serts in all of mine. Many people will strip your engine and inspect it and report no problems found, leaving you unsure about how long untill it does it again. Unfortunatly this task requires splitting the case and have a top quality machine shop install them for you.
Old 06-11-2010, 06:31 PM
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