Re: Loud engine noise on Cold startup - Saab 9000 Bulletin Board - Saabnet.com
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Re: Loud engine noise on Cold startup
Posted by claude nicolas (more from claude nicolas) on Tue, 26 Dec 2000 14:29:36
In Reply to: Loud engine noise on Cold startup, David B., Tue, 26 Dec 2000 13:53:41
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the first thing that comes to mind is the timing chain tensioner and/or chain guides having encountered a similar problem with my 9000s @ 120k miles. i first replaced the original tensioner (located on intake side of engine, side closest to bulkhead) with the re-designed self-adjusting type. it helped a bit but didn't cure prob. then replaced the rubber block fastened to underside of valve cover forward end which serves as a rattle insulator. the constant contact with the chain creates deep grooves hear. then finaly i renewed the left and right upper guides behind upper timing case cover. easier task then i expected. no need to remove upper case. only valve cover and patience.
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