Engine - Grinding/Howling/Whining Noises

DTB

Date: October 27, 2008
Order No.: S-B-13.22/01e
Supersedes: S-B-13.22/01d dated July 10, 2008
Group: 13







SUBJECT: All Passenger and Light Truck Models
Equipped with Engine M272 Up to Engine Number 272xxx 30 476520
Equipped with Engine M273 Up to Engine Number 273xxx 30 085890
Noise Coming From Front of Engine

If you receive customer reports in the above model vehicles of a RPM dependent grinding, howling, whining or high pitch whistle noise coming from the front section of the engine, this noise maybe caused by a faulty upper idler pulley. The noise can no longer be heard when the poly-V belt is removed. To resolve, replace the upper idler pulley with a new unit (Figure 1). The pulley is supplied with a mounting bolt, dust cover, flat spacer washer and a black plastic retainer (plastic assembly protection) that holds the assembly together.







NOTE: Revised instruction: It is not necessary to remove the spacer before installation. The black plastic retainer will assist in centering the flat spacer washer and pulley on the mounting lug (Figure 2).







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 July 10, 2008. Please refer to Netstar -> Star TekInfo -> Star Time for the most current labor time allowance.

In Case of Warranty

Operation: Guide pulley A - V-belt, replace (13-3350)