Yura

Just now I got my head after rebuild. There was exchanged valve guides. Valve seats was polished with valves for new position inside guides. And I have noticed that now, after polishing, the valves is more lower inside the seats then they was before. I know that hydraulic tappets should compensate some difference of valve clearance, but I want to ask is there some limitation for valve seat height? Or may be there are some other risks related with this?
Thanks a lot!

Yura

I found the picture here, on PF:



This picture can explain what I mean.
As I understand X=37,5mm is measured for new head.
Currently my head has at maximum X=38,2mm for one of the exh. valve
All others within range 37,7-38,0mm.
Is this normal for use?

tabetha

Nothing to worry about.
tabetha

Yura

Thanks tabetha, but I decided to exchange the seats - there is another problem with low quality of the custom guides which cause of valve alignment with each other. And the seats was polished according guides. Now need to reinstall new guides again and to skim seats again, so I decided to put new cast iron seats.