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Re: What’s the best valve cover gasket [Re: hemi-itis] #2886196
02/10/21 09:31 AM
02/10/21 09:31 AM
Joined: Dec 2012
Posts: 1,667
Wind Gap,Pa.
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Sammy Offline
top fuel
Sammy  Offline
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Joined: Dec 2012
Posts: 1,667
Wind Gap,Pa.
I've used the Moroso Blue with steel reinforced and they work great. Last set I bought are the steel reinforced Cometics. They fit perfectly too.

Re: What’s the best valve cover gasket [Re: Sammy] #2886269
02/10/21 11:33 AM
02/10/21 11:33 AM
Joined: Jun 2008
Posts: 3,389
usa
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lewtot184 Offline
master
lewtot184  Offline
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Joined: Jun 2008
Posts: 3,389
usa
for a BB i use fel-pro 1610 siliconed to the valve cover with a thin layer of oil or grease on the head side of the gasket to allow for easier valve cover removal if maintenance is needed. doing this for many years.

Last edited by lewtot184; 02/10/21 06:23 PM.
Re: What’s the best valve cover gasket [Re: fastmark] #2886435
02/10/21 04:58 PM
02/10/21 04:58 PM
Joined: Jan 2010
Posts: 1,293
NW Chicago suburban area
Mopar Mitch Offline
pro stock
Mopar Mitch  Offline
pro stock

Joined: Jan 2010
Posts: 1,293
NW Chicago suburban area
Just remember that rubber is NOT compressible ... it deforms ... and if it gets squeezed too much, then it splits apart. typically, rubber can only be squeezed no more than about 30% of its thickness, then it splits apart.

Cork-rubber material is truly "compressible" and forgives to some imperfections in mating surfaces. I favor the steel cored cork-rubber designs -- they hold their shape, offer compressibility and can be re-used a few times; no need for adhesives (always be careful when using RTV silicone -- too much and it will cause problems such as entering inside the engine, or acting as a slippery grease that allows the gasket to mis-align under compression/squeezing.

I'm a former gasket engineer from a major company and I wrote all the installation instructions.


Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
Re: What’s the best valve cover gasket [Re: Sammy] #2886786
02/11/21 03:23 PM
02/11/21 03:23 PM
Joined: Jan 2003
Posts: 154
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JCFcuda Offline
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JCFcuda  Offline
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Joined: Jan 2003
Posts: 154
I also use the Moroso blue steel core ones had real good luck with them.
JimF

Re: What’s the best valve cover gasket [Re: JCFcuda] #2886843
02/11/21 05:49 PM
02/11/21 05:49 PM
Joined: Jan 2003
Posts: 28,403
Oregon
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AndyF Offline
Too Many Posts
AndyF  Offline
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Joined: Jan 2003
Posts: 28,403
Oregon
The Moroso rubber gaskets work okay when captured between two flat machined surfaces. I wouldn't use them for any other application. The Moroso gaskets split apart almost instantly when used with cast valve covers that have the step in the wrong spot. The cast valve covers shear the rubber just like a big knife.

Picking the correct gasket for an application requires some knowledge. When you are sealing two flat machined surfaces a thin gasket like the Superformance pink works great. When you have cast iron heads and flimsy sheet metal valve covers then you need something super compliant with lots of give so it can fill in the voids.

Re: What’s the best valve cover gasket [Re: fastmark] #2889554
02/17/21 10:35 AM
02/17/21 10:35 AM
Joined: May 2008
Posts: 5,272
Aurora, Colorado
451Mopar Offline
master
451Mopar  Offline
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Posts: 5,272
Aurora, Colorado
I have been able to get the cork felpro gaskets to work, but the bolt torque spec is so low, you need to blue loctite the bolts so they don't back off.

On the stroker engines with adjustable rockers, I use the Blue Moroso gasket with an aluminum valve cover.

Re: What’s the best valve cover gasket [Re: fourgearsavoy] #2891320
02/21/21 08:42 AM
02/21/21 08:42 AM
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Posts: 5,798
Abilene, Texas
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fastmark Offline OP
master
fastmark  Offline OP
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Posts: 5,798
Abilene, Texas
Well, the Cometics did not work at all. Poured out like spilled coffee. In looking at these Stealth heads, I see a lot off residual oil in the heads. The path to the oil return is not as good as stock heads and the holes are much smaller for drainback. A good sealing gasket is going to be a must. The Carbon Superperformance have worked on two other stock head and valve cover builds. These Cometics did not fit the tin stock covers with a good seal. I’m going to put studs in the heads for better thread engagement and have ordered some Fel-Pro fiber/ rubber for some more squish on these surfaces. Hope that will work. Right stuff sealant on the VC side and I hope it will work.

I bought these Carbon x from Mancini. They did not recommend anything else. I guess I should have called the manufacturer.

Last edited by fastmark; 02/21/21 08:44 AM.
Re: What’s the best valve cover gasket [Re: fastmark] #2891328
02/21/21 09:13 AM
02/21/21 09:13 AM
Joined: Jun 2008
Posts: 3,389
usa
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lewtot184 Offline
master
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usa
i've found that stock (factory) valve covers don't fit worth a crap on edelbrock heads and 440 source is kind of a copy. i did find that the summit (or proform) chrome covers work great and those with the fel-pro 1610 have worked well for me. oil drain back in these alum heads isn't as good as iron. i massage the drain back holes in the heads and have notched the block some to prevent ponding.

Re: What’s the best valve cover gasket [Re: lewtot184] #2891753
02/22/21 08:20 AM
02/22/21 08:20 AM
Joined: Jan 2003
Posts: 5,798
Abilene, Texas
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fastmark Offline OP
master
fastmark  Offline OP
master
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Joined: Jan 2003
Posts: 5,798
Abilene, Texas
Originally Posted by lewtot184
i've found that stock (factory) valve covers don't fit worth a crap on edelbrock heads and 440 source is kind of a copy. i did find that the summit (or proform) chrome covers work great and those with the fel-pro 1610 have worked well for me. oil drain back in these alum heads isn't as good as iron. i massage the drain back holes in the heads and have notched the block some to prevent ponding.


The covers fit fine it’s just I have not got any kind of a seal. The Carbon X were so hard. Maybe they need heat to be compressed. Idk. Stock covers are my only option. My next build with these heads will have the drainback worked on.

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