Valve Seals?
Le Mans Master
Joined: Mar 2002
Posts: 7,456
Likes: 2
From: Coming home from Luckenbach Texas
I decided these valve seals were the best swap I could do on my L82 
"Summit"-brand Dart Iron Eagle S/S heads. Big valves, 67cc vortec-style chambers. And relatively inexpensive
"Summit"-brand Dart Iron Eagle S/S heads. Big valves, 67cc vortec-style chambers. And relatively inexpensive
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
Originally Posted by page62
I decided these valve seals were the best swap I could do on my L82
"Summit"-brand Dart Iron Eagle S/S heads. Big valves, 67cc vortec-style chambers. And relatively inexpensive
"Summit"-brand Dart Iron Eagle S/S heads. Big valves, 67cc vortec-style chambers. And relatively inexpensive
Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
For stock I would go to NAPA and get some stock umbrella seals.
I ended up replacing the Crane teflons seals that my shop put on with the Edelbrock viton ones and stopped my oil burning problem. This was on my RPM heads with Crane dual valve springs.
I ended up replacing the Crane teflons seals that my shop put on with the Edelbrock viton ones and stopped my oil burning problem. This was on my RPM heads with Crane dual valve springs.
Drifting
Joined: Apr 2003
Posts: 1,323
Likes: 2
From: Castle Hills Texas
I did this a while back with the NAPA positive stop seals. They are sort of white in color and have little springs on them. These cured all of my smoky start ups. Any positive stop seal should work for you.
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Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
Originally Posted by diablo kid
Question - to replace these seals do the heads have to come off the block?
With the piston at TDC, there is no way that the valve could drop far enough to fall into the cylinder.
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Originally Posted by SteveG75
Nope. Some people use compressed air or rope to keep the valves up. I just rotated each cylinder to TDC in turn (firing order) and then did the seal swap.
With the piston at TDC, there is no way that the valve could drop far enough to fall into the cylinder.
With the piston at TDC, there is no way that the valve could drop far enough to fall into the cylinder.
Drifting
Joined: Apr 2003
Posts: 1,323
Likes: 2
From: Castle Hills Texas
If you have it done, it will run you about $400.00 or so. At least it did for me down here in TX. I don't have a compressor to do the air trick, so I had it done. I have not had a plug foul since I had the seals replaced, which was a good 8-10 months ago and my Vette is my daily driver for the most part. I took the seals to the guy that did my car and told him that I wanted to use them instead of the usual GM 'O' rings. The positive stop seals are light years better.
Racer
Joined: Nov 2001
Posts: 478
Likes: 3
From: Huntsville AL
Racer
Joined: Jan 2004
Posts: 463
Likes: 0
From: South Haven MI
Ok, based on the picture posted, can somebody explain how they work? I pulled a chewed up set of these out of my heads and replaced them with the Felpro umbrella style. The engine has not been started yet as I've got one of those big body off restos going on.
Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
Originally Posted by jacobsed
So how do they snap onto the valve guide? Have to have a sepcial guide machined with a groove or something?
I originally had the Crane white teflons seals and was burning oil. My new viton seals from Edelbrock look exactly like the ones that Paul67 posted above.
Tech Contributor
Joined: Aug 1999
Posts: 15,175
Likes: 3,990
From: Connecticut, USA
Interesting that Paul used the Crane seals and didn't need to machine the guide? I thought the opposite,that positive seals required the guide to be machined?
The WP heads have came with the umbrella type of seal. I do have an oil usage problem that i haven't been able to track. Plugs are not fouled,some are running lean(white), no major oil leaks, but the engine uses 1 qt/600 miles. No heavy smoke unless shifting at 5500 RPM. I didn't to do a leak down or compression test yet.
Gary
The WP heads have came with the umbrella type of seal. I do have an oil usage problem that i haven't been able to track. Plugs are not fouled,some are running lean(white), no major oil leaks, but the engine uses 1 qt/600 miles. No heavy smoke unless shifting at 5500 RPM. I didn't to do a leak down or compression test yet.
Gary