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Engine Noise Under Load

Engine Noise Under Load


Cause Correction
Low oil pressure


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

2. Repair or replace as required.


Detonation or spark knock

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

Loose torque converter bolts


1. Inspect the torque converter bolts and engine flywheel.

2. Repair, as required.


Cracked engine flywheel


1. Inspect the engine flywheel and bolts.

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