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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. 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:

    • The big end 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
   


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