Knocking sound during startup after letting car sit
#16
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Join Date: Feb 2013
Location: NY
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#17
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The process is simple enough, but it requires removing valve covers. I have not removed mine, and cant tell you what else needs to be removed.
Salim
Salim
#18
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Figures..... I had the whole top of the engine opened up when I updated the rear valve cover back in May. I never even thought about checking valve clearance when I was in there.... Argh...
#20
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Related to topic, all Toyota/Lexus have a tendency to have loose valve covers at around 100k miles. I had to torque my covers down (all vehicles) to prevent oil seepage. The loose cover may cause a rattle which goes away as the engine warms up or oil gets there. So I would suggest, check that the valve covers are seated right. Please use a torque wrench to verify the hold down bolts are tightened properly.
Salim
#21
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Interesting update... The temps here in Milwaukee have been consistently below 35 the last few days, and every day when starting the car, it's been quiet. No more valve noise...... No idea why.
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