Re: timing chain noise? - Saab 9000 Bulletin Board - Saabnet.com
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Re: timing chain noise?
Posted by dex88T [Email] (more from dex88T) on Tue, 21 Dec 2004 11:47:28
In Reply to: timing chain noise?, BevanD, Tue, 21 Dec 2004 05:26:12
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timing chain rattle can occur when the chain stretches or wears enough to create some slack that allows the chain to hit a plastic "bumper" mounted on the inside of the valve cover between the cam sprockets. Snugging up the tabs that hold this bumper will solve the rattling. Whether or not the chain needs replacing at this point is debatable. Unless its in danger of jumping a sprocket tooth due to slack it may still be usable for many many miles. Before making a final diagnosis it's a good idea to isolate the noise using a stethoscope or a length of rubber tubing held to one ear. It's very noisy in that part of the engine and easy to misdiagnose problems .
posted by 129.170.116...
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