Engine - Knock/Rattle Noise At Cold Start Up

TECHNICAL

Bulletin No.: 09-06-01-015

Date: December 15, 2009

Subject: Engine Knock/Rattle Noise at Cold Start Up (Replace Camshaft Timing Gear Actuator)

Models:
2009 Pontiac Vibe
Equipped with a 1.8 L Engine (RPO LAY)

Condition

Some customers may comment on a brief knock/rattle noise from the engine compartment for a short time period on a cold soak start up, usually lasting less than two seconds.

In order to verify this condition, go to http://service.gm.com and select 2009 Pontiac Vibe-Engine Knock/Rattle Noise at Cold Startup Video.

Cause

This condition may be caused by a camshaft timing gear that is not locked in the start up position.

Correction

Important
DO NOT remove the engine to complete this repair on the vehicle.

Verify the noise. If a knock/rattle noise is present, replace the camshaft timing gear actuator.

1. Remove the camshaft cover. Refer to Camshaft Cover Removal Procedure in SI.
2. Remove the camshaft timing chain, sprocket and tensioner. Refer to Camshaft Timing Chain, Sprocket and Tensioner Removal in SI.

Note
Ensure that the new camshaft gear is unlocked (advanced position) prior to installation. Then tighten to the proper torque and lock the gear (fully retarded position).

3. Replace the camshaft timing gear actuator with P/N 19185580.
4. Install the camshaft timing chain, sprocket and tensioner. Refer to Camshaft Timing Chain, Sprocket and Tensioner Installation Procedure in SI.
5. Install the camshaft cover. Refer to Camshaft Cover installation Procedure in SI.
6. Verify that the noise has been eliminated.

Parts Information





Warranty Information





For vehicles repaired under warranty, use the table above.





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