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:

chucks88

Yep :yesnod: I had the same question when I did mine. I used the seals on the left for all of my valves and omitted the "o" rings

shotchkiss

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?

korvette4u

i did not use the seals that came with kit.. got special ones from engine rebuilder .. i believe they were like the ones on the left....but not exactly sure so do not quote me

AGENT 86

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:

BBA

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.

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

AGENT 86

:lurk: :D

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.

AGENT 86

Did you put them on all 16 guides ?
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:

scorp508

:yesnod:

Red Tornado

My mechanic has a set of these that he wants to install in my L98 whenI get the cam/valvetrain work done. He said the seals on the L98's that came from the factory are horrible, and tend to go bad very early on. Is this really true, and are the LT1 seals vastly superior & can be installed easily?

scorp508

What really sucks is the L98s trend to wear valve guides out. That sure doesn't help the seals one bit.

Red Tornado

Yeah, that does/would suck :( Probably just one more thing to have to replace :cry


[Modified by bradvette, 10:56 AM 1/27/2004]

AGENT 86

Does anyone have info or links stating that using 16 intake seals is the best way to go ??
:lurk:

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.

scorp508

Hmmm, I've got around 13k miles on mine in 1.5 years. No smoke.

Davemc1963-87conv

[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:

AGENT 86

Well after searching the internet some more I have decided on 8 more Viton intake seals.
Thanks for all the input :cheers:

scorp508

My Manley Pro-Flow valves are the same way. :yesnod: