GL 550 (164.886) V8-5.5L (273.963) (2008)
Idler Pulley: All Technical Service Bulletins
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.