This has been a lively topic on the M100 site for some considerable time. The cost of a replacement pump can be an issue, as well as the method of removal which seems open to debate. I have always maintained that it was unnecessary to remove the pump housing nor the crankshaft damper.
For the first time ever, with the Astral Silver 6.9, I have not been able to remove the pump on its own. It defied all attempts and, in the end, I have had to remove the housing as well which is fitted to the...