I am running and older set of trick flow 170cc heads that have the pedestal mount rockers. Which vavle seals do i need. summit lists three different options. It depends on the O.D. of the seal.
The heads are currently on the block and i am not wanting to remove them. I have all the tools i need to do the job. I just dont know which seals I need.should i take one out and mic the guide before i purchase?

 

Hi,
Now, I'm running TFS 170s with Viton Posi-Seals as shown in the pic. My heads are 3 years old now. However, the guides need to be machined in such a way as to accept them. What are you running now?
These are on my Windsor JRs before switching to the TWs.

 

I have an older set of TW 170s with the standard valve seals. two of them have popped up and there are several others that are leaking.
I was just going to replace them with the head on the car. with a standard TW seal. However there are several different sizes.
I dont really care to take the heads off the car.

 

Hi,
Have you broken them down, so, we can see what you have. Might help with the choice?
As I mentioned, my TWs are wearing the the posi-seals and are 3 years old. How "old" is old for your heads? What type seals are they?

 

My heads are about 10 years old. THey have the seals that come with them from trick flow.