oil pump help

[Dwight Southerland]

Originally Posted by Ed Wright

I think you have something screwy going on to have oil pressure like you discribed. I've never had one do that.

You need to look at the block carefully. You could have an internal crack in an oil gallery that expands with heat. I have seen that on two big blocks that exhibited similar characteristics. It can make you crazy chasing pumps, pickups to solve the problem.

[Ron Gusack]

Originally Posted by Dwight Southerland

You need to look at the block carefully. You could have an internal crack in an oil gallery that expands with heat. I have seen that on two big blocks that exhibited similar characteristics. It can make you crazy chasing pumps, pickups to solve the problem.

Just to be clear, the pressure fluctuation was on this test apparatus not in the car's engine.
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