Stem Seals
Thread Starter
TECH Resident
Joined: Sep 2009
Posts: 859
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From: Frozen Tundra, WI
Stem Seals Does it make a difference which seals go where?? It looks like some are black and some have a red tint. I had a performance shop do some head work and there is no rhyme or reason as to which valve they are on (Int or Exh). They are the one piece design with the seat. Is there any chance that they mic'd them and were more interested in getting a perfectly matched valve height for all valves??? They are new and have never been run.
Last edited by Paul57; Aug 7, 2011 at 10:04 PM.
Joined: Aug 2007
Posts: 24,241
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From: Turnin' Wrenches Infractions: 005
Black is intake and the burnt orange is the exhaust. Sounds like some shoddy work to just randomly insert them on the head. Shows lack of attention to detail IMO.
Thread Starter
TECH Resident
Joined: Sep 2009
Posts: 859
Likes: 2
From: Frozen Tundra, WI
Thanks. I was afraid that might be the case. Since they are the one piece design, is it very hard to remove the seat?? Are they pressed on or do they just slide right off?? Should I expect to have the seals fail sooner if they aren't on the correct valve...i.e. oil burning on start up sooner??
The brown ones, as stated, are for exhaust. They take the exhaust valve heat better. Sounds like the shop didn't know the difference. They can be removed but you must be very very careful. Once the valve spring is off, wrap a rag around the body of the valve seal and using some pliers rotate the seal back and forth working it off. Lubricate the valve stem first. Don't bend or deform the body of the valve seal.
