Im not putting my heads back together for a bit but, I know when i removed all the valves the little black plastic seals all broke. They were so brittle and old.

Do i need to replace these with new ones? Which i would think i would.

Also are those seals made only for our valves or are they universal and fit all types of valves?

Thanks

 

Yes, you need to replace them.

 

Fairly common size, and cheap too. Should be easily under $30 for a set.
Mine are going, but I'm way too lazy to tear apart the head for maintenance.

 

yea thats a long job if you just gotta take all that apart for just the seals..


Anyone happend to know the diameter of these seals?? size?

 

dpnt rep[lace them with stock o ring seals, goto ur local autoparts store and get a set of sbc stem seals. these go over the top of the valve guide and are 1000000 times better

 

Valve stem diameter 0.344"...

Valve Stem Seal 11/32"...

 

OK thanks. ill get them ordered!

 

I just go with the Umbrella's myself...

http://www.summitracing.com/parts/SLP-MV1233/

 

wow that cheep.. 21 cents a piece. Finally something thats not exspensive. Unlike everything else. I still need new springs... those arnt to bad but still all the little crap adds up. Oh yea and a new timing chain kit, i still need.

 

get the umbrella seals those are what i was talking about just be aware there are different ones for the ex side vs the intake side since the ex side gets hotter. just order a set for a sbc and u will get the right ones

 

Ok thanks!!

 

http://www.jegs.com/i/Fel+Pro/375/SS72527/10002/-1

will these do the job.. i live near jegs and summit.. lucky me.. so i figured id stop by and get them.

 

http://www.jegs.com/i/Comp+Cams/249/518-12/10002/-1

get that set then there is enough for the intake and ex , with those u dont need the o-rings, the o-rings are worthless anyway and they make reassembling the valve keepers and locks a pita

 

I have a set of replacement springs still in boxes if you still need a set...

 

Well napa is stupid beacuse i ordered all the gaskets i needed, and unbrella valve seals for a SBC and what did they give me....those stupid o-ring ones.. Well i just need to keep my patients. I was hoping to have the motor back together this weekend to break the cam in but i guess itll have to wait a few more days.

 

I need to replace the valve stem seal on my 89 lb9 motor does anyone have a acutal part numbers for the intake and exhaust from summit or autozone?

I'm looking for the umbrella seals that dont require install of any o-rings.Do I have to use positive seals?any worries about valve guide not getting lube with umbrella type.I keep getting confliting fits wont fit on diff websites looking for felpro preferably thanks

 

the 2.8 and 3.1/3.1 all can use the .530 size seals for a small block chevy
ur local parts store will stock them , i preffer getting good quality ones from jegs or summit racing , but parts store ones will work just fine . i ust get the better ones since the turbo motor puts out a bunch more heat into the ex valves

no issues on the v6 witht he positive type seals either


this set is perfect for the v6 http://www.jegs.com/i/Comp+Cams/249/518-12/10002/-1

 

thanks

 

So the heads have to come off or can i pull the covers, rockers, etc and find a way to keep air in the cylinder so the valves dont drop in? I got 150k on my 5.7tpi and cant afford a rebuild, but getting a bunch of oil into chamber when she sits. Hard to start and blows smoke. My father, mechanic for almost 40yrs, says its the valve seals. I dont wanna open another can of worms by taking heads off. Especially since previous owner booger the intake in.

 

heads can stay on.

plenty of info and videos on youtube

 

Another resurrected post.... lol I started it in 2011 when my car was a slow 140hp turd... and the last post was about 1 1/2 years ago....

 

and in 20 years it is still viable info...so whats your point?