Is there a way to test oil pumps? Alternatively a recommended inspection procedure? We're doing a complete rebuild of our 914-6 engine (same as 1969 911T 2.0L as I understand it). We have the 3-rib magnesium oil pump that appears to be original. It turns freely with my fingers. It will get spirited street driving only, so I'm not feeling compelled to replace it if working as designed.
