valve recession?

[Speedwell Sprint]

I have an original 163 head where the valves are quite deep. Top of valve heads are flush with the combustion chamber. Is this too deep? Any problems with this? Thanks

[lisian_1275]

I assume that this is after the seats have been cut?
They will be fine, it is only when they pocket down below the combustion chamber floor, then you would need to go to the next oversize valve ( which can be a challenge with a Mk 1 's' head.

Thanks

Ian

[andy1071]

This will cause the valve to be shrouded, as it starts to open, and before closing.

-This will cost power

-it's the same as fitting a lower performance camshaft...

[Vegard]

Fit inserts, then the 163 may live longer as a bonus.

[Speedwell Sprint]

Thanks for the replies. I figured the head was done for. The machine shop set them all at the same height... bummer!