Is it possible to set the valve seat to deap in the head, so lifters don`t close valves. Some of mine exhaust valves do not close, when i turn cam in closed position. It`s a standar exhaust cam, and i have try whit different lifters.

Geir Rune

 

The valves are possibly bent????

Not sure about the seating question though

 

No, they are not. They close until cam and followers is mounting. The head works are done by an engine builder. It looks like some of the seats are deaper in the head than others, and they are the problem.

 

Jesus, they really would need to be deep for that to happen, never seen it on a cossie yet.
tabetha

 

It's quite common to use cheaper VW lifters on a cossie head. They are a tad longer, but normally don't create problems.

 

Was everything working fine before the head work was done? Was there any damage previous to the head work?

 

It`s new oe ina followers, and have also try 2set from my other engine, whit the same problem. This engine was working fine, until the ex owner get a breakdown on a rod bearing, it got a full rebuild, and 3 valves have been change.