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Hi I'm Kevin I would always recommend a new gasket with small amount of gasket sealer on the mating face as this will make sure there are no problems at all. You only need a thin layer of sealant . Hope this helps please feel free to ask any other questions you may have
Hi Gary, I have to disagree with Kevin. I have serviced Mercedes cars since 1976. Mercedes has NEVER recommended the use of any type of sealant on their rubber valve cover gaskets. The gasket should be installed dry.
I have to disagree the only gaskets you shouldn't use sealant on is the older cork gaskets it's actually recommended to use sealant on rubber gaskets as a belt and braces approach but as this whole conversation is now likely to be compleatly confusing I'm going to opt out
You are entitled to your opinion Kevin but Mercedes has never ever used any type of sealant on their rubber gaskets. I'm sure you are a very competent technician but your answer was a general answer and shows your lack of knowledge of this particular brand.
Sorry for the back and forth on this Gary but the correct procedure is to install the gasket dry. Tightening torque on the valve cover nuts is only 4 ft. lbs. The cover can be re-tightened after 100 miles. Over-tightening the nuts will distort the valve cover and cause leakage.
Let me know if you have any questions.
You're quite welcome Gary.
Hi Gary, I'm just following up with you on this question. Do you need anymore help with this?