S 550 (221.171) V8-5.5L (273.961) (2007)
Evaporative Emissions Hose: All Technical Service Bulletins
Emissions - Pulsation Noises From EVAP Purge Line
Date: July 9, 2007
Order No.: P-B-47.30/42a
Supersedes: P-B-47.30/42 dated October 12, 2006
Group: 47
Revision History
Revision
Date
Purpose
A
7/9/07
VIN Number Included
-
10/12/06
Initial issue
SUBJECT:
Model 221.171 (Models without ABC suspension), Up to VIN A090734
Pulsation Noises from Purge Line
If you receive customer reports in the above model vehicles of pulsation noises from the purge valve, it may be due to the pulsating flow from the
activated charcoal filter to the engine that causes the purge line to vibrate. These vibrations are initiated through mounting points or contact of the
line on the body and may be heard as pulsation noises (ticking noises) inside the passenger compartment. To remedy, install a fluid reservoir
(Figure 1) between the purge valve and the line to the activated charcoal filter.
Note:
This modification does NOT apply to vehicles equipped with ABC suspension.
Note:
The hose (A221 476 00 11) is to be replaced with a fluid reservoir package (Figure 2 above).
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair.