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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 407 (Engine Mechanical - 6.2L (LT4) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Engine Noise Under Load

Engine Noise Under Load

WARNING: This page is about a different car, the 2022 Cadillac CT5. 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. Oil Pressure Diagnosis and Testing 
  2. Repair or replace, as required.
Detonation or spark knock Verify the correct operation of the ignition controls. Symptoms - Engine Mechanical 
Loose torque converter bolts
  1. Inspect the torque converter bolts and flex plate.
  2. Repair, as required.
Cracked flex plate - automatic transmission
  1. Inspect the flex plate bolts and flex plate.
  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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