Tonyls430 Posted February 4, 2022 Share Posted February 4, 2022 Does anyone else have trouble with their valve cover gaskets always leaking after a year of getting new ones ? Ls430 Quote Link to comment Share on other sites More sharing options...
Bykfixer Posted February 4, 2022 Share Posted February 4, 2022 Moved to a spot where LS430 owners would probably see this. As a rule valve cover gaskets tend to flatten so the need to squeeze them a little tighter by tightening bolts down is not unusual. Oil is under fairly strong pressure throughout the engine and in the case of a valve cover gasket it can find it's way out. Bolts can stretch over time too. Thereby reducing the tension applied to the items being clamped together. During assembly at the factory bolts are tightened to a given torgue spec but it's not unusual to have to re-tighten them later. If the gasket was replaced at any point it stands to reason after a "break in" period the bolts should be re-torqued. 1 Quote Link to comment Share on other sites More sharing options...
JoeP7 Posted June 10, 2022 Share Posted June 10, 2022 It’s wise to use OE valve cover gaskets. Rt side gasket leaks will torpedo your Alternator if you let a leak go too long. Quote Link to comment Share on other sites More sharing options...
RX400h Posted June 10, 2022 Share Posted June 10, 2022 Ours were replaced at an independent repair shop after the gaskets started seeping after 14-15 years. That was a few years ago and they gaskets are still sealing very well. Quote Link to comment Share on other sites More sharing options...
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