Engine - High Pitched Whining/Whistling Noise

Date: December 6, 2007

Order No.: T-B-13.22/02c

Supersedes: T-B-13.22/02b dated Nov. 14, 2007

Group: 13

Revision History

Revision Date Purpose

C 12/6/07 Added Note Concerning Packaging Material (Shown with asterisks)

b 11/14/07 Part Number Corrected

a 11/6/07 Figure 1 and Warranty Information Added

- 01/07/06 Initial issue

SUBJECT:
All Light Truck Models Equipped with Engine M272 or M273

Whining / High Pitch Whistle Noise Coming From Front of Engine





If you receive customer reports in the above model vehicles of a whining or high pitch whistle noise coming from the front section of the engine, this noise maybe caused by a faulty upper idler pulley. To resolve, replace the upper idler pulley with a new unit (Figure 1). The pulley is supplied as a package containing mounting bolt, dust cover and spacer. Fit the spacer between the timing case cover and guide pulley.

*Note:
The new pulley comes packaged with a black plastic spacer which is used to hold the pulley assembly together. This bushing is to be removed and discarded before installation.*





Parts Information

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on November 6, 2007. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.





In Case of Warranty, use the table.