what size umbrella seals??

[MrHernandez]

In the process of building vortec heads for my 305 and I need to know what size umbrella seals to use. Jegs has a few different sizes and searching on the internet I found no definitive answers. All components are Comp Magnum, 268 cam, 305 vortec style heads with stock valves. Thanks in advance for any and all help.

 

[pontiacgp]

I'm replacing the valve stem seals on my vortec heads using the fel pro SS 72861 set.....530 with 11/32 valve stem

http://www.jegs.com/i/Fel-Pro/375/SS72861/10002/-1

 

[MrHernandez]

Thanks for the help GP! Went with some comp viton seals of the same size.

 

[pontiacgp]

I had the same problem you had trying to find the size of the seals. I spent some time searching them down a couple of weeks ago so your timing was perfect, glad I could help.. 🙂

 

[MrHernandez]

Turns out that was the wrong size so back to jegs they go. My guides are 11/32 x .560 and I'm having a hard time finding them.

 

[pontiacgp]

the fel pro seals I am using are .545x11/32.....the measurement I found before was .530 so that must be wrong.