Ok, im in the middle of re-bilding my heads, and I need help getting the exaust valve stem seals on. Luckily, I got two sets, bc I've broken 6/8 spares trying to find a way to get them on. They get stuck in the 2nd ridge on the valve (where the o-ring sits), and they crack when I try to push them past that point.I'Ve tried persuading them with a deep well socket and a hammer (which worked for the inteke valves), I've tried oiling them, and heating them up (to soften them). All of these attempts failed. So im out of ideas. Anybody know a way that works?

 

Are you sure you have the right ones?

 

Yeah im with griff on this one. When i first started reading i was thinking heat might help but i see in your post you have been there and done that. Keep us up to date on this one maybe with some luck some one with the same issue will drop in.

 

Yea, all of the fectory seals for both the intake and the exhaust look like this
but the kit i got only had ^ those kind for the intake, and \/ for exhaust

What i ended up doing was buying a 2nd kit and putting the blue ones on all the stems (thats the way the factory did it)

 

Are those positive-stop viton seals? If so don't you have to have the head machined with a narrowed area around the top of the valve guide to accept that style if they're stock?