Took part the old oil pump, man this thing doesn’t deserve the bad rap it gets. Practically no wear in 160k miles. I’m going to go out on a limb and say the original pump is NOT the problem with this engine and that it’s the guides breaking apart clogging the pickup tube when people ignore the startup rattle, which then damages the pump over time as it starves for oil which results in a low pressure condition. My pump wore exceptionally well and supplied good pressure still, but my guides never broke. I think a lot of people are blaming this oil pump for something it can’t control. If you pinch off a hose it’s not the nozzles fault pressure isn’t coming out. My 2 cents.