1998 3.9 compression issue
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Joined: Apr 2010
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From: Clayton MI
That is a VERY good question. Theoretically, it isn't, but, we have had members report that when their timing chain broke, valves got bent. Which would indicate that it IS. If your chain didn't break, or slip excessively, valves should be good.
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Joined: Oct 2021
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Welcome to the forum
Last edited by gabbyRose; Jun 15, 2022 at 04:53 PM.