Are you pushing down towards the pump with the drill? There shouldn't be any downward force applied to the oil pump shaft, or the gear attached to it will be forced into the oil pump cover and drag/bind.
Also the engaugement between the priming tool and the pump shaft is not exactly a precise fit that may create some clatter/vibration.
I'm sure youve seen/heard of spacer/washers that are installed between the intake manifold and the distributor collar to make sure when the distributor is tightened that it is not binding the pump. You can tell its not binding if you can insert the distributor without a washer and the collar sits all the way down on the intake. If it doesn't sit flush on the intake you can use a feeler gauge to measure seperation and install a washer thats about .050" thicker.
Last edited by ssmonty; 04-04-2012 at 05:01 PM.