Re: Valve marks on head

Posted by Owen_Dyneto On 2017/6/8 12:15:24

What would the down side be to taking a dremel tool and relieving some of the dome where the valve appears to have struck?

Taken far enough, altering the flame propagation and probably more importantly, weakening the structure. To just grind away a couple of thousandths, probably nothing significant.

Tried the Dremel job some years back on a '54 Cavalier head that had been resurfaced unnecessarily. In those engines the valves are not perpendicular to the deck so what hits first is a crescent-shape from a segment of valve head. Lots of grinding but in the end we hadn't yet gone deep enough but were afraid to go any deeper. We then tried the extra thick solid copper custom-made head gasket and it gave enough relief but leaked profusely. Finally, scrapped the head.