Umbrella AND O-ring valve seals?
Thread Starter
Instructor
Joined: Jun 2008
Posts: 233
Likes: 9
From: Marietta Ga
Umbrella AND O-ring valve seals?
Can we install both O-ring and umbrella style valve seals without a problem with valve guide lubrication? 73 L82 350.
I have both and ready to do the job....anyone install both on the same valve(s) without issues?
Seems like both will do a better job than just one.....?
I have both and ready to do the job....anyone install both on the same valve(s) without issues?
Seems like both will do a better job than just one.....?
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
This is a good read:
http://www.hastingsmfg.com/ServiceTips/valve_seals.htm
From what I read, umbrella OR o-ring. But for the best seal, go with a positive locking seal locked over the guide and valve stem. Positive seal does not ride with the valve. It stays locked over the top of the guide and wipes the valve stem as the valve moves up/down.
http://www.hastingsmfg.com/ServiceTips/valve_seals.htm
From what I read, umbrella OR o-ring. But for the best seal, go with a positive locking seal locked over the guide and valve stem. Positive seal does not ride with the valve. It stays locked over the top of the guide and wipes the valve stem as the valve moves up/down.
Last edited by TedH; Jun 11, 2014 at 06:55 PM.
Racer
Joined: Aug 2006
Posts: 330
Likes: 3
From: Wellington, New Zealand
I have a 74 L48 that was giving a good puff of smoke on startup from bad stem seals, I just replaced with factory style O rings and the problem was fixed. Your seals will be very brittle and just fall apart when you go to replace them, that is the only reason they have failed.
Race Director
Joined: Jan 2000
Posts: 13,022
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Both will work fine together.
JIM
JIM
Race Director
Joined: Jan 2000
Posts: 13,022
Likes: 2,264
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Both will work fine together.
JIM
JIM
