Leaky Lower Valve Covers

rib · rib's Garage

I need to change the valve cover gaskets on my 911. Does anyone out there know what type OEM valve covers are on my car and is it worth up-grading to turbo valve covers?

Porsche 911 Carrera 1986 (Euro Spec)
Steve Wong Chip
Modified Air-Box with BMC Race Filter
SSI with M&K 2 into 1 Muffler.

signature65 · 10-04-2008, 08:33 AM

yes yes and yes, and search search and search.......

slodave · slodave's Garage

You already have turbo valve covers. If you replace the gaskets, check to make sure the covers are not warped - they still can warp.

rib · rib's Garage

Quote:

Originally Posted by slodave

You already have turbo valve covers. If you replace the gaskets, check to make sure the covers are not warped - they still can warp.

Thanks for the support.

Por_sha911 · Por_sha911's Garage

-You should have turbo covers already.
-Over-tightening the valve covers will warp them and make them leak.
-Use the gaskets that have a silicone bead (sold by our host).
-Make sure you get all of the old gasket off but don't scar the cover.
-There is a lot of info already out there so it is wise to do a search to find out how to check for warped covers.

SteveinTO · 10-05-2008, 08:23 PM

With the valve covers off, take two big sheets of #400 grit wet/dry sandpaper and tape them down on the new granite counter top in the kitchen. Add a little water. Slide the cover around in a circular motion until the mating surface is "shiney." If you're "warped," it'll show. Otherwise you'll have a clean flat surface. Doesn't make much diff what gaskets you use, I like the stock ones, just don't over-tighten the nuts.

If you get caught during the kitchen part, you'll be sleeping under your car.

4flyboy · 4flyboy's Garage

Now that's why I'm not married......................yeah thats why hmmm.

S.

Nine9six · Nine9six's Garage

A thick sheet of glass (coffee table top) might be better. I am not sure of the flatness requirement for granite countertop, but I know glass will meet your needs.
Yes, I am well aware that surface plates are made of granite, but those plates are honed to the desired grade/flatness. They don't fall off the trees in that configuration.