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Old 06-07-2007, 11:50 PM
booalou booalou is offline
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Default Valve cover gaskets

After I had my "thunderbird" valve covers chrome I installed new rubber gaskets with some fancy high boy bolts. I found that due to vibration these always come loose from vibration. My question is if I remove the valve covers clean the gasket of oil and reinstall with stainless steel bolts do you think this will stop the leaks?
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Old 06-08-2007, 06:34 AM
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Alexander Alexander is offline
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Yes, you can stop the leaks from the valve covers. One big way that valve covers leak is from over-tightening the bolts. they should only be torqued to 5 to 8 ft-lbs. That's not much. Pretend you have a broken hand if you are tightening them without a torque wrench.

You should look at your valve covers. You will probably see that they are bent down at the holes where they were overtightened. You can straighten these by using a small hammer, and two pieces of hard wood. Turn the valve cover upside down and lay the edge on the wood block. Put another piece of wood on the inside lip of the valve cover, and then tap the wood with a hammer until the edge is straight. Do not over do it and bow it in the other direction.

A clean gasket with a thin layer of silicone sealant helps eliminate the leakage problem.
1959 Hard Top
1960 Golde Top
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