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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Mechanical - 3.2L) >> Diagnostic Information and Procedures >> Upper Engine Noise, Regardless of Engine Speed

Upper Engine Noise, Regardless of Engine Speed

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Upper Engine Noise, Regardless of Engine Speed

Cause Correction
Low oil pressure
Improper lubrication to the valve lifters Inspect the following components, and repair or replace as required:
  • The SHLA - valve lifter
  • The oil filter bypass valve
  • The oil pump and pump screen
  • The cylinder head oil galleries
  • The engine block oil galleries
Worn or dirty SHLAs, valve lifters Replace the SHLAs - valve lifters.
Stretched or broken timing belt and/or damaged sprocket teeth Replace the timing belt and sprockets.
Worn timing belt tensioner or tensioners Replace the timing belt tensioner or tensioners as required.
Worn engine camshaft lobes
  • Inspect the engine camshaft lobes.
  • Replace the camshaft or camshafts and SHLAs, valve lifters, as required.
Worn valve guides or valve stems Inspect the following components, and repair as required:
  • The valves
  • The valve guides
Stuck Valves
Carbon on the valve stem or valve seat may cause the valve to stay open		 Inspect the following components, and repair as required:
  • The valves
  • The valve guides
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