LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Valve Stem Seal?

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Old 01-14-2009, 02:04 PM
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Default Valve Stem Seal?

Guys,

I'm having the springs changed when I do the cam swap next month, so I completely forgot but it's probably a good time/insurance to go ahead and change my valve stem seals. Anyone recc a certain brand, type (rubber, teflon, viton, etc...) and size I need to go with.

Here are the specs of my heads and springs:

AFR 190s (1.800 installed spring height)
Intake valve (2.020 standard length)
Exhaust valve (1.600 standard lenght)
Springs - Howards 98441 (id: .800 and od: 1.437) (These are the one's going on)

Not sure if you need all this info, but just looking for a good set of seals that work great. Part numbers or links if you have em please. Thanks.
Old 01-14-2009, 02:17 PM
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Originally Posted by DAVE00
Guys,

I'm having the springs changed when I do the cam swap next month, so I completely forgot but it's probably a good time/insurance to go ahead and change my valve stem seals. Anyone recc a certain brand, type (rubber, teflon, viton, etc...) and size I need to go with.

Here are the specs of my heads and springs:

AFR 190s (1.800 installed spring height)
Intake valve (2.020 standard length)
Exhaust valve (1.600 standard lenght)
Springs - Howards 98441 (id: .800 and od: 1.437) (These are the one's going on)

Not sure if you need all this info, but just looking for a good set of seals that work great. Part numbers or links if you have em please. Thanks.
If the springs are designed to work with stock size valve seals, many will recommend going with GM replacement valve seals, and others will say that the Felpro replacements worked great for them. I have the felpro replacments on my car, I am using the Crane dual valve springs.
Old 01-14-2009, 05:20 PM
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I'm going to be using Patriot Viton seals on mine, because that's what came in the Patriot Gold valve spring kit I bought. The valve stem size for an LT1 is 11/32.
Old 01-14-2009, 07:55 PM
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Looks like I'm going with the Viton, anyone have a recc brand to go with?
Old 01-14-2009, 08:00 PM
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Originally Posted by DAVE00
Looks like I'm going with the Viton, anyone have a recc brand to go with?
I bought these but never used them..Lloyd rec these during my swap. You can have them for N/C if you want them bro.
Attached Thumbnails Valve Stem Seal?-bella-pics-2955.jpg  
Old 01-14-2009, 08:02 PM
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I've used the K-Line, PEP, and Comp Viton seals with no issues. You just need to verify the OD of the guide on the LT1 AFR heads. They are sometimes different than the stock size of .530"...

Shane
Old 01-14-2009, 10:23 PM
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Originally Posted by Elliott's94Z
I bought these but never used them..Lloyd rec these during my swap. You can have them for N/C if you want them bro.
Elliot, you da man and I thank you for your offer but I think I am gonna go with the Viton seals from Comp. Little pricey but I plan on keeping this car for a very long time and the motor sits alot without being driven so I need something that will hold up a little longer. Once again thanks, but I think I'll pass for now.

Last edited by DAVE00; 01-14-2009 at 10:33 PM.
Old 01-14-2009, 10:36 PM
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Originally Posted by XtraCajunSS
I've used the K-Line, PEP, and Comp Viton seals with no issues. You just need to verify the OD of the guide on the LT1 AFR heads. They are sometimes different than the stock size of .530"...

Shane
Double checked and the seals that AFR uses and teh same part # I have from AFR is for .530" guides and 11/32 size for valve stem. I am thinking abou these from Comp, what du u guys think?

http://www.jegs.com/i/Comp+Cams/249/529-16/10002/-1
Old 01-14-2009, 11:38 PM
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Originally Posted by DAVE00
Elliot, you da man and I thank you for your offer but I think I am gonna go with the Viton seals from Comp. Little pricey but I plan on keeping this car for a very long time and the motor sits alot without being driven so I need something that will hold up a little longer. Once again thanks, but I think I'll pass for now.
No worries man good luck with the build
Old 01-15-2009, 06:55 AM
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Originally Posted by Elliott's94Z
No worries man good luck with the build
You know what's funny - Lloyd just got back to my email and he recc'd the same Viton seals I put up there. Told me to stay far far away from the rubber seals, guess it's an AFR head thing - not sure. Thanks again.
Old 01-15-2009, 09:02 AM
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Originally Posted by DAVE00
You know what's funny - Lloyd just got back to my email and he recc'd the same Viton seals I put up there. Told me to stay far far away from the rubber seals, guess it's an AFR head thing - not sure. Thanks again.
Really? Yeah I only bought these because he rec them..of well at least you will be putting on what you feel comfortable with.



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