Water pump

While collecting some parts I asked if I could just jump on the lathe for a few moments as the standard cooper water pump has a 6pk ribbed pulley. I locked the end of the water pump in the chuck and began to rotate the item at 20rpm and to my surprise the body of the water pump stayed still and did not rotate with the pulley. After a while I decided that I could get away with 80rpm and got the job done in no time. Other machine shops said the pulley had to be off the pump before it could be machined but I can confirm this not to be true especially as the pulley is plastic with a steel insert.

Job done and on the car

I may need to add a grip surface to help the back of the belt but that is not too much of an issue