Now Pat for love of the Irish, no, I am not calling you a liar. For outside diameters such as measuring cranks and pins if you use a calibrated micrometer with a tenths vernier then you can resolve 2 tenths. For inside diameters you will need an ID micrometer (3 lobe type) with a tenths vernier, calibrated using its doughnut standard, and then you can resolve 2 tenths. If you are using a telescoping gage or simple ID mic as most shops do you are not going to routinely and accurately resolve 2 tenths. You could also use a dial bore gage with tenths resolution if you have the appropriate gage to set it up with.

When you align hone you can use your ID mics to verify the diameters but you cannot easily and accurately measure that the centers of each bore in the line are within 2 tenths of each other. As an experienced machinist though you know if it was set-up right it is as good as it can be.

And Pat you are at the top of a very short list for me the next time I need an engine built.

Kitz