D21 Hardbody 2WD L4-2389cc 2.4L SOHC (Z24i) (1988)
Oil Pressure Regulator Valve: Testing and Inspection
Oil Pressure Relief Valve
OIL PRESSURE RELIEF VALVE INSPECTION
Inspect oil pressure relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove valve by prying it out with a
screwdriver. Install a new valve in place by tapping it.