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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Engine Mechanical) >> Diagnostic Information and Procedures >> Engine Noise Under Load

Engine Noise Under Load

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
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 controls. Refer to Detonation/Spark Knock in Engine Controls - 6.0L.
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
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