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Home >> Chevrolet >> 2023 >> Camaro ZL1, 2D Convertible, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Mechanical - 3.6L - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Engine Noise on Start-Up, but Only Lasting a Few Seconds

Engine Noise on Start-Up, but Only Lasting a Few Seconds

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Cause Correction
Incorrect oil filter without anti-drainback feature Install the correct oil filter. Maintenance Items
Incorrect oil viscosity Drain the engine oil and replace with the correct viscosity oil. Adhesives, Fluids, Lubricants, and Sealers
High stationary hydraulic lash adjuster (SHLA), valve lifter, leak down rate Replace the SHLAs, valve lifters, as required.
Worn crankshaft thrust bearing
  1. Inspect the thrust bearing and crankshaft.
  2. Repair or replace as required.
Damaged or faulty oil filter bypass valve
  1. Inspect the oil filter bypass valve for proper operation.
  2. Repair or replace as required.
Malfunctioning camshaft position actuators - improper oil viscosity or contamination. Isolate the noise to a specific camshaft position actuator. Disconnect the electrical connector on the camshaft position actuator solenoid valves and start the vehicle. If noise is gone, repeat procedure to limit to an individual actuator. Camshaft Position Actuator Replacement - Bank 1 , or Camshaft Position Actuator Replacement - Bank 2
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