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Home >> Saturn >> 2006 >> Relay 3.9 1, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 3.5L) >> Diagnostic Information and Procedures >> Engine Noise Under Load

Engine Noise Under Load

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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 knock sensor system. Refer to Electronic Ignition (EI) System Description in 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 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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