Could spark plugs replacement lead to Valve Cover Gasket Replacement.
#1
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Could spark plugs replacement lead to Valve Cover Gasket Replacement.
Hello, probably a stupid question from non-car guy, but I'm curious. My car is Lexus RX330 2005. My mechanic replaced spark plugs about 3 months ago, I think car mileage was ~140K at that time. Today, mechanic said that I need to replace Valve Cover Gasket, and the mileage is ~145K. He said that when he'd been replacing spark plugs gaskets had been ok. So, my question is could the work on spark plugs lead to failed valve cover gasket (front one). I have warranty on the work, but not sure I can prove that changing spark plugs could lead to a new problem with the gasket. Sorry in advance if my question doesn't make any sense.
#5
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I usually hand tighten bolts then check back, always too lazy to look for specific values. Bad I know but my hood is open every week so I see leaks immediately. But I recall ~17ft-lb for the valve cover and ~12-15ft-lb depending on which screws for the intake plenum as their are different sized screws.
#7
The torque spec for the intake plenum is 28 Nm . The spec is the same for the nuts (2) and the allen head bolts (4).
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