Re: Valve grinding tools

Posted by Owen_Dyneto On 2014/10/28 22:45:10

Lapping is not recommended if both the seats and valves have been machine-refinished - this provides a more precise and smoother surface than you get with compound and hand lapping.

You could do a check however to make sure they seat well; a series of radial lines with a soft pencil across the valve face and then rotate the valve back a forth perhaps 1/4 turn in each direction under thumb pressure - then remove and check that all the lines are evenly broken.