Check Engine Oil Pressure at Each Cylinder Head

(Check Cylinder Head Oil Pressure)

NOTE:
To Ensure Accurate Diagnosis, Use The Same Oil Pressure Gauge To Check The Pressure At Each Cylinder Head.





1. On the right cylinder head, the oil pressure tap is located on the side of the head between the front exhaust manifold port and the front cover and beneath the rocker cover. Remove the plug and connect the oil pressure gauge. See Figure 5.

2. Start the engine and allow the engine to stabilize at idle, then record oil pressure gauge reading.

3. Shut the engine off. Remove the gauge and reinstall the plug.





4. On the left cylinder head, the oil pressure tap is located exactly opposite where the tap was on the right head. Remove the plug and connect the oil pressure gauge. See Figure 6.

5. Start the engine and allow the engine to stabilize at idle, then record the oil pressure gauge reading.

6. Remove the gauge and reinstall the plug.

7. Compare the readings. Are both readings 10 psi or above, and is the difference between the two readings less than 3 psi?

a. Yes - Change engine oil and filter again. Return the vehicle to the customer. No further action is required.

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