Engine Noise on Start-Up, but Only Lasting a Few Seconds. Chevrolet PJJ 2001

For 1990-2009 cars

Cause | Correction
--- | ---
Incorrect oil filter without anti-drainback feature | Install the correct oil filter.

Incorrect oil viscosity

1. Drain the oil.
2. Install the correct viscosity oil.

High valve lifter leak down rate | Replace the lifters as required.

Worn crankshaft thrust bearing

• | Inspect the thrust bearing and crankshaft.

• | Repair or replace as required.

Damaged or faulty oil filter by-pass valve

• | Inspect the oil filter by-pass valve for proper operation.

• | Repair or replace as required.