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Engine Noise Under Load

Engine Noise Under Load


Cause Correction
Low oil pressure


1. Check oil pressure. Refer to Oil Pressure Diagnosis and Testing .

2. Repair or replace as required.


Detonation or spark knock

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

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 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