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

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 Engine 🢒 Engine Mechanical - 2.6L and 3.2L 🢒 Engine Noise on Start-Up, but Only Lasting a Few Seconds

Cause

Correction

Incorrect oil filter without anti-drainback feature

Install the correct oil filter.

Incorrect oil viscosity

Drain the engine oil and replace with the correct viscosity oil.

Damaged or faulty oil filter by-pass valve

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

•	Repair or replace as required.

High SHLA, valve lifter, leak down rate

Replace the SHLA, valve lifters, as required.

Worn crankshaft thrust bearing

•	Inspect the thrust bearing and crankshaft.

•	Repair or replace as required.