03-05-2024, 09:34 PM
It is certainly possible to have the crankpins ground, but more important than undersize is the ovality. If the pins are circular (measure in two planes at right angles) any slight rust traces can probably be removed with a strip of fine emery cloth pulled back and forth all round the pin concerned. If the journals are circular and clean after doing that I suggest that you measure the metalling in the rods to check whether it matches the journals or whether remetalling is needed. I recommend John Kirkby in Croydon, S London for the metalling, and he would do grinding as well if it is needed. By entrusting the work to a vintage specialist such as John Kirkby it will be done right (I have used him over many years) and there has never been a problem. He would probably take only 5 thou off the journals if you ask him, rather than the 10 thou any one else would grind. This leaves more metal on the shaft for maximum strength and potential for future grinds if you get to needing another after much happy motoring!