Engine Noise Under Load. Chevrolet PJJ 2001

For 1990-2009 cars

Cause | Correction
--- | ---

Low oil pressure

• | Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing .

• | Repair or replace as required.

Detonation or spark knock | Verify the correct operation of the ignition controls. Refer to Engine Controls.

Loose torque converter bolts

• | Inspect the torque converter bolts and flywheel.

• | Repair as required.

Cracked flywheel - automatic transmission

• | Inspect the flywheel bolts and flywheel.

• | Repair as required.

Excessive connecting rod bearing clearance

Inspect the following components, and repair as required:

• | The connecting rod bearings

• | The connecting rods

• | The crankshaft

Excessive crankshaft bearing clearance

Inspect the following components, and repair as required:

• | The crankshaft bearings

• | The crankshaft journals

• | The cylinder block crankshaft bearing bore