L98 Valve Seals ??
Thread Starter
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
L98 Valve Seals ??
I just picked up valve seals for this weekends roller rocker conversion.
I remember someone say to use all intake seals. I bought the intake and exhaust thinking it's a good thing to have extra lube on the exhaust valve stems. Is my thinking wrong or is there advantages to using all intake seals.
Advice needed.
Here's a pic of the felpro seals. They come with the "O" rings also.
Thanks :cheers:
I remember someone say to use all intake seals. I bought the intake and exhaust thinking it's a good thing to have extra lube on the exhaust valve stems. Is my thinking wrong or is there advantages to using all intake seals.
Advice needed.
Here's a pic of the felpro seals. They come with the "O" rings also.
Thanks :cheers:
Drifting
Joined: Jul 2002
Posts: 1,488
Likes: 4
From: Frostburg MD
Re: L98 Valve Seals ?? (AGENT 86)
That's exactly what I used on my engine, they've worked fine in the hour I've run the engine. (Stuck in the middle of winter here, salt, snow ice, just ugly stuff out there) Did you see the link on the FelPro site about valve seals, it may help you. http://www.federalmogul.com/cda/cont...6_7501,00.html My '89 had no exhaust valve seals, the FelPro umbrella style should work fine for me, the exhaust valves are hotter, maybe that's why they have different seals. One little thing that may help you, be sure you have the spring and retained compressed before you slide the top O-ring on, I didn't and had to redo some of them because it slid down the valve and wouldn't seal then. You installing new springs since you'll have it all apart?
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Re: L98 Valve Seals ?? (AGENT 86)
I just picked up valve seals for this weekends roller rocker conversion.
I remember someone say to use all intake seals. I bought the intake and exhaust thinking it's a good thing to have extra lube on the exhaust valve stems. Is my thinking wrong or is there advantages to using all intake seals.
Advice needed.
Here's a pic of the felpro seals. They come with the "O" rings also.
Thanks :cheers:
I remember someone say to use all intake seals. I bought the intake and exhaust thinking it's a good thing to have extra lube on the exhaust valve stems. Is my thinking wrong or is there advantages to using all intake seals.
Advice needed.
Here's a pic of the felpro seals. They come with the "O" rings also.
Thanks :cheers:
Thread Starter
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
Re: L98 Valve Seals ?? (shotchkiss)
You installing new springs since you'll have it all apart?
LT4 valve springs,hardened push rods and guideplates to accomadate my roller rockers :thumbs:
LT4 valve springs,hardened push rods and guideplates to accomadate my roller rockers :thumbs:
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: L98 Valve Seals ?? (AGENT 86)
I only use factory type seals now, and I use the intake type seals on both intake and exhaust.
I usually get new seals from the local cylinder head repair company, (Dover Cylinder Head, here in Jax)
I have used teflon/poly seals before only to find out they last about one seasons worth of drag racing...as in they will be shot in less than a years worth of street driving.
I usually get new seals from the local cylinder head repair company, (Dover Cylinder Head, here in Jax)
I have used teflon/poly seals before only to find out they last about one seasons worth of drag racing...as in they will be shot in less than a years worth of street driving.
Burning Brakes
Joined: Apr 2001
Posts: 1,209
Likes: 0
From: Toronto Ontario
St. Jude Donor '13
Re: L98 Valve Seals ?? (AGENT 86)
The best seals you could use are the selas that come on the Lt1's. Its a metal case with a rubber/teflon coating on the inside. If someone can post a pic you will see how they are different and much better as a seal. They are very cheap from the dealer and I would only recomment them.
Good Luck,
Victor
Good Luck,
Victor
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Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: L98 Valve Seals ?? (AGENT 86)
I can't find a picture, but I use Comp Cams 503-16 which are 11/32" Teflon Seals. They have the metal band around the outside of them and you have to machine the tops of the valve guides to fit them.
Thread Starter
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
Re: L98 Valve Seals ?? (scorp508)
I can't find a picture, but I use Comp Cams 503-16 which are 11/32" Teflon Seals. They have the metal band around the outside of them and you have to machine the tops of the valve guides to fit them.
From what I understand, restricting too much oil on the exhaust valves can induce more wear. With the lack of lead now this seems even more important.
:cheers:
Team Owner
Joined: Sep 2002
Posts: 22,209
Likes: 12
From: OBAMA IS HITLER
Re: L98 Valve Seals ?? (89'Bowtie)
The best seals you could use are the selas that come on the Lt1's. Its a metal case with a rubber/teflon coating on the inside. If someone can post a pic you will see how they are different and much better as a seal. They are very cheap from the dealer and I would only recomment them.
Good Luck,
Victor
Good Luck,
Victor
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: L98 Valve Seals ?? (bradvette)
He said the seals on the L98's that came from the factory are horrible....
Team Owner
Joined: Sep 2002
Posts: 22,209
Likes: 12
From: OBAMA IS HITLER
Re: L98 Valve Seals ?? (scorp508)
He said the seals on the L98's that came from the factory are horrible....
What really sucks is the L98s trend to wear valve guides out. That sure doesn't help the seals one bit.
What really sucks is the L98s trend to wear valve guides out. That sure doesn't help the seals one bit.
[Modified by bradvette, 10:56 AM 1/27/2004]
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: L98 Valve Seals ?? (BBA)
Nope...
but what ever you do...dont use teflon seals unless you want a motor that smokes on start up a year or two after putting them in.
but what ever you do...dont use teflon seals unless you want a motor that smokes on start up a year or two after putting them in.
Racer
Joined: Aug 2002
Posts: 386
Likes: 0
From: Lancaster Lancashire
Re: L98 Valve Seals ?? (89'Bowtie)
[QUOTE]The best seals you could use are the selas that come on the Lt1's. Its a metal case with a rubber/teflon coating on the inside. If someone can post a pic you will see how they are different and much better as a seal. They are very cheap from the dealer and I would only recommend them.
I think you guys might be referring to the Lt4 seals part# 10212810. I might be wrong but have been researching which seals to use on my 87 and these keep coming up! I will be using Manley undercut valves that only have one groove for the keepers, so will need a good seal on both inlet and exhaust valves. If anyone thinks this is a bad idea, please chip in. (I am assuming the valve guide OD is the same on the L98 & Lt1/4) engines. Oh yeah, I think they were about $1.25 each last time I checked. :steering:
I think you guys might be referring to the Lt4 seals part# 10212810. I might be wrong but have been researching which seals to use on my 87 and these keep coming up! I will be using Manley undercut valves that only have one groove for the keepers, so will need a good seal on both inlet and exhaust valves. If anyone thinks this is a bad idea, please chip in. (I am assuming the valve guide OD is the same on the L98 & Lt1/4) engines. Oh yeah, I think they were about $1.25 each last time I checked. :steering: