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Thinking out loud... If a chain tensioner became hyper-extended and was stuck beyond it's normal range of travel due to movement during the IMS retro, would it cause a nasty noise like that? My brother developed a squeal on his 99 and it was worn out chain tensioners.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
Last edited by Topless; 08-22-2012 at 02:02 PM.
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