grrr, valve cover leaking oil - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Huck · 06-07-2006, 08:39 AM

Leaky valve covers have been a small black issue since 55' but no amount of gaskets or sealer on the gaskets will help if the intake bolts have no sealer on them. You could get both oil and antifreeze coming up them holes which will drive you nuts. SEAL-em first then see what you have.
My experience has been best with cork valve cover gaskets but the install is more critical then the material. The 88-98 350's with injection are also notorious for intake gasket leaks which are a bugger to replace so just be aware~~~.

**Daubs** · 06-19-2006, 09:31 PM

When I installed alum intake I put RTV sealant around the ALL the bolt holes (both sides of gasket) but did NOT put thread sealer on the bolts themselves. Could that be case of my oil leaks?

*MisterMan* · 06-19-2006, 09:34 PM

Quote:

Originally Posted by 67Fleet

I just replaced the gasket on my driver side valve cover because it had been spitting oil onto my intake manifold. It's still doing it!!! I spent about an hour cleaning the bottom of the valve cover yesterday of the goop and then went to get some nice Felpro valve-cover gaskets (the rubber ones). I installed and put the valve-cover back on. It was a total PITA because they make the gaskets slightly smaller than the cover so I had to use a little gasket spray adhesive to get it to stay long enough to flip it over and stick on the head. Took it out and drove it up to my buddy's shop to help one of my club members bag his S-10. As I was driving home, I got on it a little and then smelled some burning oil.

WTF??? Got home and its still spitting on the intake and also looks like down the backside of the motor. The cover doesn't look warped, and I can't see any of the gasket sticking out anywhere. What should I do? Could it be a leak from somewhere else?

it smacking ur intake manifold and causing a gap???

Gray Ghost · 06-19-2006, 09:37 PM

Yes...on the middle two bolts on each side around the carb, you need a lot of thread sealer on each bolt. I forgot this last time and have a couple of leaks.

You CAN seal chrome valve covers, ya just haveta use studs and RTV and re-tighten after the motor warms up a couple of times.

06-07-2006, 08:39 AM	#26
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Re: grrr, valve cover leaking oil Leaky valve covers have been a small black issue since 55' but no amount of gaskets or sealer on the gaskets will help if the intake bolts have no sealer on them. You could get both oil and antifreeze coming up them holes which will drive you nuts. SEAL-em first then see what you have. My experience has been best with cork valve cover gaskets but the install is more critical then the material. The 88-98 350's with injection are also notorious for intake gasket leaks which are a bugger to replace so just be aware~~~.

06-19-2006, 09:31 PM	#27
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 611	Re: grrr, valve cover leaking oil When I installed alum intake I put RTV sealant around the ALL the bolt holes (both sides of gasket) but did NOT put thread sealer on the bolts themselves. Could that be case of my oil leaks? __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

06-19-2006, 09:37 PM	#29
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: grrr, valve cover leaking oil Yes...on the middle two bolts on each side around the carb, you need a lot of thread sealer on each bolt. I forgot this last time and have a couple of leaks. You CAN seal chrome valve covers, ya just haveta use studs and RTV and re-tighten after the motor warms up a couple of times. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.



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