Low oil pressure

1. Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing : LE5 or LE9 .
2. Repair or replace as required.

Detonation or spark knock

Verify the correct operation of the ignition. Refer to Symptoms - Engine Controls .

Loose torque converter bolts

1. Inspect the torque converter bolts and flywheel.
2. Repair as required.

Cracked flywheel, automatic transmission

1. Inspect the flywheel bolts and flywheel.
2. Repair as required.

Excessive big end bearing clearance

Inspect the following components, and repair as required:

Excessive crankshaft bearing clearance

Inspect the following components, and repair as required:

Malfunctioning camshaft position actuators - improper oil viscosity or contamination.

1. Verify correct oil pressure. If low, inspect the bottom of the oil filter for oil filter drain back feature. Refer to Oil Pressure Diagnosis and Testing : LE5 or LE9 .
2. Isolate the noise to a specific camshaft position actuator. Disconnect the electrical connector on the camshaft position actuator solenoid valves and start the vehicle. If noise is gone, repeat procedure to limit to an individual actuator. Refer to Camshaft Position Intake Actuator Replacement : LE5 or LE9 or Camshaft Position Exhaust Actuator Replacement : LE5 or LE9 .