Join Date: Aug 2011
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So I measure one head last night, confirmed the 3.74 minimum, decided to go old school on the measuring, used the granite table, made three posts out of 1-2-3 blocks, with steel balls, shimmed them all to height, and used a surface gauge to measure the head surface which was now paralleled to the granite table. Got one set of readings, then switched the three points opposite, and confirmed the repeatability.
The head shows an arc with the center two cylinders .0025" less than the outer two, so looking at the head, fire surface up, it is dipped down at the two inner cylinders.
We will use the FARO to confirm these readings at lunch time.
I haven't checked the other head yet. If it is way out, the decision is easy,replace it, if it is "flat" or at .0025" again, risk it and run it?