dlpalumbo

Bought the Rennline covers a while ago and finally got my car in for reseal and lo and behold the valve covers leak. The car is back for a valve adjustment and the shop is at wits end trying to stop the leaks.

Anyone have a similar experience. I found 1 post that said you have to take extra care around the corners as they are sharper curves. Does this ring a bell with anyone else that has tried to fit these covers?

Thanks for help,

Dan

Goughary

Of course they are.

Question is how much or how bad.

The nuts are on at 7 ft/lbs. and if they don't go on perfectly even all around or if they loosen up a bit...you get weeps. No biggie.

If the oil just decides to come out and say hello, that happens too. No biggie.

If it's a huge pool on the ground...something to look at.

jpar

I coated my gaskets (stock valve covers) with curil-t 2 years ago, everything is still perfectly dry.

Mr.Alex

Whether they are rennline or not is irrelevant, I believe they look amazing but offer no real benefit otherwise. Its all in how well the gasket is seated and tightened up.

Super90

I've wondered about this.

In the past, on another car that happened to have magnesium valve covers (BMW E34 with the V8), I have used the Permatex Anaerobic Gasket Maker on the flange before mating the valvecovers with their respective gaskets. That prevented any leaking again until the covers were removed.

Why would this not be something worth doing on these motors?

dlpalumbo

With regard to these sealers, how hard is it to remove the sealer when its time to refit new gaskets? I have a few horror stories from back in the day trying to scrap clean valve covers and heads.

Super90

I had no issue cleaning up the Permatex Anaerobic product.

Vandit

When I did my valve covers (stock magnesium) I reinstalled them dry and now they weep. When I did my timing chain covers I put a super thin glaze of Hylomar on the gasket surface and on the chain box face and I think they're still dry. Next time I have the valve covers off I'll probably give the gaskets a bit of Hylomar.

HalV

What version of Hylomar did you use on your timing chain covers?

-nick

I'm a fan of applying a thin coating of DC55 grease to any rubber gaskets. It swells the rubber, keeps them pliable, and I'm able to reuse them several times. No leaks. If only I could apply it to the nose bearing...

Vandit

http://www.hylomarsealant.com/_resou.../products.html

"Hylomar M (previously known as Racing Formula) is an acetone based version of Hylomar Univeral Blue. The only noticeable physical difference between the Hylomar M and the original Hylomar Universal Blue is the acetone version exhibits increased adhesive properties when compared to the standard Hylomar Universal Blue. Thus, making it an ideal product for high performance applications. Therefore, it is used by Formula One and NASCAR® race teams. Typical applications include coating of pre-formed gaskets, water and oil pumps, cylinder heads and sumps, inlet manifolds, timing case covers, gear box and transmission components, thread sealing or for use on finely machined surfaces."

John McM

I resealed my original covers using new gaskets and Wurth Flange Sealant (Local OPC told me they use it). Fingers crossed no leaks so far.

prschmn

964s with painted valve covers tend to peel the paint in the gasket "groove".
You can wind up with a leak that's between the cover itself and the loose paint.
I bead blast them and have had zero problems with leaks.

FeralComprehension

Hylomar skim on the gasket for me, too. My car leaks, but not from the valve covers.

newsboy

Curil T also worked for me.