So last week I dismantled both a pair of e7te heads, which will go on my old engine and were also for practicing on, and a pair of gt40 heads for my new engine build.
Both were probably never worked on-- or if they were, it didn't show ;-)
So both types of heads from the factory had o-ring type seals on both the intake and exhaust valves.
When my parts came, it was evident that they wanted me to put oring seals on the intake, but umbrella type seals on the exhaust valves.
What's the practical difference?
Now, I didn't realize that a gasket kit comes with valve stem seals so I'd ordered a full complement, and I have 2 sets of seals- 16 oring seals and 16 umbrella seals.
So I can put all oring seals on the one set of heads that I'm using, like oem came with, or I can make use of the umbrella seals if they have some advantage on the exhaust valve...?
...what's your advice?
As a followup, is there any difference between the valve stems of gt40 heads and e7te heads, I don't need to order a 3rd set for the gt40 heads do I?
Both sets are made in the US, one from sealed power and one from victor, so neither should be crap: but one set says "viton" and is just black rubber, the other, as far as the oring half for the intake, has this white plastic insert in the middle, which was weird.
What's that plastic insert, and which set do you think is better if I have to pick one for my car?
Hopefully assembling tomorrow night-- let me know!