2 replies to this topic

[Fast Ivan]

there seems to be a difference of opinion when it comes to fitting new valve guides and if you need to re cut the valve seats

the pic below is a head with new guides just pressed in

 

 

the light from the torch really highlights the gap and I don't think a bit of lapping is gonna bring that back!!

I was amazed at that gap

Edited by Rob Mac, 08 September 2014 - 08:25 PM.

[GenLightening]

Yes, if you put in new guides you need to recut the valve seats to be aligned with them.

[Guess-Works.com]

Yes, valve seats need to be re-cut, and as you say this highligts the issue...

 

Many will say you will get away with it, and you will for a while, but any misalignment of the seat will cause the valve to wear the guide prematurely, thus you will be changing the guides again.