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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 4.8L, 5.3L, And 6.0L (1 Of 4)) >> Diagnostic Information and Procedures >> Engine Noise Under Load

Engine Noise Under Load

WARNING: This page is about a different variant/trim than selected.
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 - 4.8L, 5.3L, and 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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