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C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

valve Seals

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Old May 30, 2005 | 12:52 PM
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Default valve Seals
Which do you prefer, GM or Felpro? Also, if you prefer GM. Do you have a part # for an LT1.
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Old May 30, 2005 | 12:56 PM
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stay away from the white teflon crap seals.
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Old May 30, 2005 | 02:24 PM
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Since my OEM seals lasted over 100k miles I went with them; and you know they will fit with no problems.
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Old May 30, 2005 | 02:34 PM
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Originally Posted by STL94LT1
Which do you prefer, GM or Felpro? Also, if you prefer GM. Do you have a part # for an LT1.
Either one would work OK. Another brand is PC or Perfect Circle but I think they were swallowed up by Federal Mogul. FelPro I beleive is the vendor to GM.
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Old May 30, 2005 | 02:38 PM
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10212810 Black ones for intake.
12564852 Red ones for exhaust...from GM a couple of years ago.

CNC also included the black ones for both intakes and exhaust...about 28 bucks from Superior Chevrolet for 16.

I have no complaints.

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Old May 30, 2005 | 03:16 PM
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Felpro viton (intake) seals are better than stock. I used 16 rather than use the hard plastic exhaust seals.
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Old May 30, 2005 | 03:29 PM
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I'm quite sure the LT1/4's are different than early C4's...either because of the aluminum heads or simply a change of seal layout.

The OEM's looks very similar to the Fel Pro that I've seen...they just pop on with a little plastic tool or...maybe a wooden dowel depending what you have available.

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Old May 30, 2005 | 07:31 PM
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Originally Posted by No Go
10212810 Black ones for intake.
12564852 Red ones for exhaust...from GM a couple of years ago.

CNC also included the black ones for both intakes and exhaust...about 28 bucks from Superior Chevrolet for 16.

I have no complaints.

Yeah, my CNC Heads have all black seals. With is the difference with the red seals?

Thanks for the part #'s, I'll pick up a set this week.
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Old May 30, 2005 | 08:38 PM
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Default Teflon valve seals?
Originally Posted by 8388
stay away from the white teflon crap seals.

What's the problem with "teflon" seals? Please let me know before I put my engine together.

Thanks,
JTHVETTE
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Old May 30, 2005 | 09:19 PM
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Originally Posted by JTHVETTE
What's the problem with "teflon" seals? Please let me know before I put my engine together.

Thanks,
JTHVETTE
They tend to deform with heat, they will not grab the guide and thus ride with the valve, rather than wiping the oil as intended. Useless !
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Old May 31, 2005 | 01:34 AM
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They also become brittle and fail, leaking oil into the exaust valve.
Just don't drop a valve into the engine when changing them.
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