Check Engine Oil at Main Oil Gallery

(Check Main Gallery Oil Pressure)

1. Run engine until it reaches full operation temperature (about 10-15 minute).

2. Raise vehicle on a hoist.

3. Position a drain pan under oil filter adapter.

4. Unscrew the blue oil cooler hose from the oil filter adapter. About 1 pint of oil will drain from the hose when disconnected.

5. Disconnect, then remove the oil pressure sending unit from the adapter.





6. Connect oil pressure gauge to the oil pressure sending unit port on the adapter. See Figure 4.

7. Reconnect the blue oil cooler hose to the adapter.

8. Lower the vehicle. Top off the engine oil with 5W30 engine oil, XO-5W30-QSP or equivalent, as required.

9. Start the engine and allow the engine to stabilize at idle, then record the oil pressure gauge reading. Is the engine oil pressure above 25 psi?

a. Yes - Reinstall the oil pressure sending unit and top off engine oil, then continue diagnosis. Go to CHECK CYLINDER HEAD OIL PRESSURE

b. No - Call 1-800-325-5621 for further instructions regarding engine replacement.