When does oil psi drop on a C-15 ACERT?
When does oil psi drop on a C-15 ACERT? When the motor is cold everything is fine, but when the coolant gets above 170 or so the oil psi will drop off 5-10psi when I load the motor. After about 30 seconds into the pull the oil psi will start to rebound back to normal most times. I was thinking main bearings, but this problem isn't consistent. What causes a C15 to plug the oil filter? Discussion in ' Trucks ' started by wrench23, May 21, 2011 . I have seen C15s plug the oil filter with soot. This is...