Originally Posted by
QC97Z
I tried Fel-Pro's "Cork-Lam" laminated cork with steel layer. I started with using some gasket sealer on the valve cover side, nothing on the head side. Both leaked. I tried gasket sealer on the head side also, they both leaked.
I tried torquing them in different patterns, then just tightening the crap out of them, I got the passenger's side to seal, but no dice on the driver's side.
Then I went with Stock-like gaskets (not GM, but GM replacement) and tried gasket sealer on both sides. Again, the driver's side still leaked.
When I got them, there were several grind/wire wheel marks on them from manually grinding off high spots (thus probably creating low spots). When I took them off yesterday, there was a grind mark right where the cover was leaking, the back outer corner of the driver's side.
The manufacturing process for Canton's (and most other sheet metal fab style covers) is terrible and inconsistent. I don't believe Canton does much for quality control/inspection. They should be running the rails on every cover through a mill for flatness, but what do I know? I'm just a sheetmetal engineer.
My new valve covers are AWESOME! I bought them through Scooter's Performance in Florida, they are manufactured by Carbon Components in CA. They're carbon fiber. They are just like stock covers, but a bit taller, and have no internal bracing to cut for larger RR's. They have the notch for alternator clearance on both covers, so you can mix and match which side you want which cover on (if you wanted oil fill elsewhere, etc).
They start with a "blanket" of carbon fiber, it gets loaded into a 1 piece billet die, and polymers are injected into the die and around the carbon fiber. They're pretty thick, and have a REALLY nice finish to them. Nice and shiny, with a really "deep" look to them from the polymer layer on top of the carbon fiber. They come with an oil fill already installed in the stock location, but you have to drill your own holes for breathers, etc. I liked that, because I decided I wanted a breather on both covers, and went with Mr. Gasket 3/4" neck BB breathers. Using masking tape on the top side and a regular-ass hole saw, I had my holes. Clean them up with a file a little bit, and you have your grommet holes.
I used Fel-Pro VS 50088R, the blue stock-ish gaskets (they have a more dry matte finish than the other stock replacements I had [Victor Reinz]). I used Right Stuff on the valve cover side (after stretching the crap out of the gaskets, but they are purposely manufactured smaller). I put them on the head rails with no gasket sealer on the head side. They fit PERFECTLY, centered right up, hardware went in no problem. You can re-use stock hardware, but I opted for some nicer stainless rounded head hex bolts.
So far, they're sealing like a dream. They are expensive though... $375. But, they're unique, flashy, and just as good as (if not better than) stock. Totally worth the money, especially from the hell I went through with the Canton's and not being able to drive the car for a month after dyno.