Yes it has a check valve that if stuck the oil pressure is raised way of the normal psi. That's the only thing I can think of, the customer drove it with the light on approx 120 miles and developed a slight knoock. We did an oil psi test replace the valve and was hoping no damage was done. The knock did not go away, we pulled the pan and some rod caps and they were washed, maybe fromlack of oil?
Because of the low mileage, I don't wnat to put in a junk yard motor. I'm sure it will need cranl and bearings and possibly cam bearings. the vehicle is in mint condition. Were just to busy to fix it right now.
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