VALVE COVER GROMMET LEAKS

[EOLIVER]

I have a 1989 Corvette Conv and I recently repalced the valve cover grommets on both sides but on the dirver side cover ther still appears to be a small leak from the PVC vavle grommet. Could this be a blowby situation or could exhaust back pressure cause this? When I purchase corvettes, I usually have the exhaust checked for back pressure, but have not got around to it. The motor just turned over 90K and I think its to soon for a blow by (worn rings) Interested in hearing advice on how to seal the grommets.

 

[G Winter]

Are you sure the PCV valve is working ?

Glenn

 

[EOLIVER]

Yes both the grommet and PCV valve are brand new.

 

[EOLIVER]

I should also say I don't know the history on the engine. It has an adjustable fuel pressure regualator and aftermarket ACCEL fuel injectors.

 

[WNH]

Maybe the grommet isn't the right size.
Did you buy it 'specifically' for your C4 from a Corvette parts supplier, or did you get it from an auto parts store ?

The auto parts stores have grommets that look the same, but are really different sizes.

[Just my .02]

 

[RV Guy]

I have a 1989 Corvette Conv and I recently repalced the valve cover grommets on both sides but on the dirver side cover ther still appears to be a small leak from the PVC vavle grommet. Could this be a blowby situation or could exhaust back pressure cause this? When I purchase corvettes, I usually have the exhaust checked for back pressure, but have not got around to it. The motor just turned over 90K and I think its to soon for a blow by (worn rings) Interested in hearing advice on how to seal the grommets.

Did you find your problem? I need to replace my valve cover grommets also on my '86. It only has 65,000 on it and runs great but I am getting leakage around both grommets and the oil fill cap. I don't know wether to just go to the auto parts store or look somewhere else. I don't see any listed in Mid America's or Corvette Central's catalogs.

Thanks.

 

[RV Guy]

Did you find your problem? I need to replace my valve cover grommets also on my '86. It only has 65,000 on it and runs great but I am getting leakage around both grommets and the oil fill cap. I don't know wether to just go to the auto parts store or look somewhere else. I don't see any listed in Mid America's or Corvette Central's catalogs.

Thanks.

I just found them listed in Corvette Central. Is there really any difference between these and the ones at the corner parts store?

Thanks.

 

[grapeknutz]

Do a leak down test on the engine! It sounds as you have excessive blow by past the rings. That can force oil leaks.