As long as the engine was running, the oil pump had to be spinning. Yes, it was making a sloppy contact with its drive gear, resulting in the irregular timing that caused David's car to run poorly. But it was turning at the correct speed, so it would generate normal oil pressure. Once the oil pump gear degraded to the point where it stopped turning (or slipped a few teeth), the distributor stopped turning (or the timing was too far off) then the car stopped running. In other words, in this failure mode, the engine can't have no/low oil pressure and still be running.So no weird or low oil pressure behaviour?
The oil plug has a magnet on it, so it's great at trapping iron or steel debris. But brass and bronze are non-magnetic so they wouldn't show up on the plug.No weird metal debris on the oil plug at that most recent oil change?
Did your's fail like David's - with the brass/bronze gear getting chewed up?I just read the Classic Alfa description of the pump they sell. They are probably going to tell you it was installed wrong. I use the method they call for and still had two fail.
Sorry, I don't understand what you are respectfully disagreeing with.Hi there Jay, I'm going to respectfully disagree...The oil pressure sender for the gauge is the very last thing in the oil pressure system.
I guess you're saying that if the oil pump gear fragments really trashed the engine internals, there would be ferrous as well as non-ferrous debris in the oil. And the ferrous stuff would cling to the drain plug. Sure, I'll give you that. But is the converse true? That is, if there isn't ferrous debris on the drain plug, can David be certain that no crankshaft oil passages are blocked, no bearings are scored, ....? As gigem75 says in post #55 above, David or his mechanic can inspect some of the bearings while changing the pump. And he can cross his fingers that no oil passages are blocked (which yes, shouldn't happen if the oil filter didn't become completely clogged).Why disregard if there are extra bits on the oil drain plug? True gear material isn't magnetic, but the degrading bearings are, as well if the oil system has metal bits zooming around in it this may create extra wear in general.