| disprove. He spent all his time showing how the 'system' (pump, gasket, flange, etc) can have more than 1mm variation. That was NOT the point which was originally brought up. He should have taken the three OEM pulleys, put is on the same pump, and show that variation. There is no way a 2mm variation will be present between one OEM pulley and another. All he showed is if your car is off by 1.22mm due to variances in you particular 'OEM system' it could then be off by 3.22mm using their pulley. That kind of shift in load on the bearings will affect the bearings life. I am not usually one to get involved in this type of stuff, but his denial about a problem in their 'design' is ridiculous, and he refuses to directly address the issue.
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