76 Spit with low/no oil pressure and a hammer in the engine, not that unusual, death-rattle cold/hot.
Owner reported that he had oil and filter changed 150 miles ago.
Dumped the (5W30) oil, and pulled the filter to inspect the anti-drainback valve and to inspect the element for trash. No surprise that the filter had no oil in it when removed, but the filter cartridge was loose in the can (!). I cut it open and the spring was MISSING from the oil filter, leaving about 1/4 inch of axial "float" in the element. This made both the drainback inop, plus the filter was bypassing...
Filter in question NAPA 21374.
I guess the message here is to be suspect of everything.
Glen
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