Re: 8BA compression issues
I think you might be on to something. If the guide is interfering with the valve, it can't be much. I thought about driving the guide down without the spring and see if the clearance changes, but probably not enough to measure. I think I would try removing about .005-.010 from the top of the guide. You might do some close measuring on one of the valves from the side with the head off.
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