Is there a "relief valve" on the engine case?

[C4C_Leon]

I have a '02 C4 that is Supercharged, but now it is spraying oil from the right side of the engine.

It does it only when it is being driven not revved while stopped.

I was told that may be because a valve on the engine designed to open when the pressure gets too much is probably faulty and is opening too soon

Anybody heard of such a valve? And does it break?

[1999Porsche911]

I have a '02 C4 that is Supercharged, but now it is spraying oil from the right side of the engine.

It does it only when it is being driven not revved while stopped.

I was told that may be because a valve on the engine designed to open when the pressure gets too much is probably faulty and is opening too soon

Anybody heard of such a valve? And does it break?

What kind of supercharger? Possible areas where oil leaks can occur would include the oil sending unit and from around the spark plug tubes. The cam cover may also weep oil. Cause of "spraying" oil due to intake boost would be surprising since boost does not enter the crankcase. (or at least shouldn't).

I would confirm exactly from where the oil is leaking and go from there. Also check your oil filter for proper seal.

Edited August 13, 2008 by 1999Porsche911

[C4C_Leon]

Thanks I'll check the oil filter

It's a EVO supercharger.

As to confirm where exactely it is leaking from, that has proved to be quite difficult. I just can't seem to pinpoint it.

The valve idea came from the dealer

[Mother]

I have a '02 C4 that is Supercharged, but now it is spraying oil from the right side of the engine.

It does it only when it is being driven not revved while stopped.

I was told that may be because a valve on the engine designed to open when the pressure gets too much is probably faulty and is opening too soon

Anybody heard of such a valve? And does it break?

Never heard of this valve and in general dealerships are not that familiar with SC setups, Did you have it installed in CA if so take it back to them or find a Indy shop that in your location that has exp with SC installs would be your best bet. Have to admit it is sometimes easier to locate a leak with car on a lift. Edited August 14, 2008 by Mother

[C4C_Leon]

It was installed by EVO in AZ

Took it to an Indy and he said he tracked it down to the oil cooler.

Is that on the right side of the engine?

[Mother]

It was installed by EVO in AZ

Took it to an Indy and he said he tracked it down to the oil cooler.

Is that on the right side of the engine it's #11 in picture?

Yes, right side at front of engine.

Edited August 18, 2008 by Mother