Don & Teresa Merriman wrote: > > Knurling the valve guides is a used car lot repair. There are some old > arguments about the groves left in the guide from knurling holds more oil > for good lubrication, not in a cast iron guide, knurling fractures the metal > about .005 deep for rapid wear.
It sounded like Trampas was talking about knurling the OUTSIDE of the guide to keep it from falling loose from the head.
