Well, that would be because I've watched entirely too much Stargate, and Cameron Mitchell's (Ben Browder) call sign was 'Shaft' in the Air Force. Cam 'Shaft' Mitchell as in camshaft.
I did not discuss this amusing tidbit with the mechanics.
Now. All I need to do is find a sunken Spanish galleon, a leprechaun with a bucket, or the lost city of El Dorado, and I can pay the nice auto folks the $2,100-2,800 it's going to cost to fix said camshaft.