Quote:
Originally Posted by rbahr
I asked this question of a well known BMW race shop and parts supplier, who told me that they had 2 cases of spun crank hubs on their cars.
That said, the jigs for drilling straight holes in a crank had better be pretty good.
I will be planning this as well as upgrading the wheel hubs in my track-toy M2.
Ray
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In conjunction to the jig, I think you should have the radiator, bumper support bar, and full front bumper removed for the drilling, so the mechanic can actually sit down in front of the crank hub and hold the drill in a comfortable angle. This way you can ensure it is drilled straight vs. looking down from the top of the engine bay and trying to drill straight (which more so relies on the jig holding the drill bit straight).