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If the cams turn OK in the head with the valve cover IE>>cam bearings torqued to spec. Its OK to surface the head.
I take the valves out toque the bearings and turn the cams.
There are probably ten trillion engines in wrecking yards. So a head would not be hard to find. It would need surfacing anyways.
And as a side note: surfacing a BMW head would not take enugh material off to mess with the chain tension. It would be way pased the minimum spec and the valves would probubly hit the pistons first at that point.
We used to straighten BMW heads when they where warped so bad the cams would not turn and then surface them.
Last edited by Two Rivers; 03-08-2011 at 02:51 PM..
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