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Engine Noise Under Load

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
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 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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