valve stem seals?

[wtfox]

I am rebuilding my motor and decided to do a little refreshing of the heads. well I am accustomed to imports and have not seen valve stem seals like those on the E7 heads. Is the little plastic washer that floats on top of the valve stem seal necessary? I havent gotten my replacement seals yet so I have nothing to compare to yet. I am just looking for someone with a little expereince with these? Thank you.

 

[wtfox]

well the new seals did not come with the plastic washer so I assume they were unnecessary.

 

[dsblk93gt]

Not sure what you mean?

 

[Jays04mach1]

he is refering to the o ring that sits below the keepers. It was rubber but now is very brittle, almost plastic like.

 

[dsblk93gt]

Should be a positive style seal like this but the old heads actually had the o-ring seals. Of course if these come apart it may look like an o-ring....?

 

[dsblk93gt]

I have seen some complete engine gasket kits that had the positive and umbrella mix though...

 

[Jays04mach1]

They include both in the gasket kit to cover a variaty of heads. Positives have to fit on a machined riser, the umbrella's can fit damn near anything.

 

[wtfox]

This is what I was talking about.

The old stem seals were a stock, ford, positive style seal but these were over the top of them between the seal and retainer. They were a perfect slip fit over the valve stem. I've just never seen anything like that before.

 

[dsblk93gt]

Neither have I honestly.