oil pump wear

Hey Mel you want to look at the oil pump drive shaft, pull the gear/ shaft out and see how much wear is on the tapered end that fits in the cam gear.

I won't reuse a oil pump if theres a mm wear off opposing edges

Mario Vintage Werks resto

Yes, you want to look for a worn cover, as well. This is a telltale sign of a worn pump, learned this one from firsthand experience as well as the advice of many professional engine builders.

If you are cheap and want to extend pump/pressure life(Not the correct place to save pennies, buuut..).

Smooth pump cover on flat surface(thick glass is good), use fine emery cloth.

Smooth pump body with gears in till(Surface to cover) all even, the gasket will provide clearance.(Use thin paper gasket, make if have to...).

The wear at the back of pump body/cavity is more difficult.

J.

At the price of a new pump, it isn't worth spending more than 10 minutes dealing with an old one.

Jim SR Racing

The most significant wear point is in the bore that the drive gear shaft goes through the pump body. If it is ova led enough, the drive gear will no longer be parallel to the driven gear or the pump body. Take both gears our, and place the drive gear from the back side of the pump. Try to move the gear sideways. There should be no noticeable sideways movement.

You can ignore the wear rings on the bottom of the pump body.

Oil pressure is affected by the axial end play of the gears. The gap between the gear edges and pump cover should be 0.15mm max. Follow Berg's advice to increase oil pressure of a used pump. This way you force the gears to be more parallel to each other, and so the gap on either side of the gears between pump body or pump cover is minimized, so less pressure leaks inside the pump.

-- Bill Spiliotopoulos, '67 Bug.