Hey Ron or Elan, is this what is mentioned in the oil pump kit as the full kit ? I only got the o-ring & spring kit. If this is something that could cause lower than normal oil pressure at idle then maybe I should change it while I'm in there. I haven't installed the kit yet. I'm gonna change my header bolts to studs and put in new donuts when I do the pump kit. I have around 20 lbs. at idle when warmed up but some people say they have 40 lbs. I'm not doing this because of a problem but it just makes sense do to the age of the parts in the environment they live in.
The pump itself can leak between the 2 rotors if the shaft seal is hard, cracked, or split, too. This doesn't happen often (split-crack), but most are hard now. It's tricky to change, but sure increase hot oil pressure if the crank bearings are good. Elan's spring and plug will help, just because it reduces the leaks in the bypass circuit (whether it is supposed to be bypassing, or not).
