Engine Noise on Start-Up, but Only Lasting a Few Seconds. Chevrolet Chevy C Cab/Chassis HD (GMT 400) 2001

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Engine 🢒 Engine Controls - 6.5L (L65) 🢒 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 oil.

•	Install the correct viscosity oil.

High valve lifter leak down rate

Replace the lifters as required.

Worn crankshaft thrust bearing

•	Check the crankshaft endplay.

•	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.