Cooling System - High Pitched Noise From Under Hood
NUMBER: 07-003-06GROUP: Cooling
DATE: September 21, 2006
SUBJECT:
High Pitched Tone from Engine Compartment At Temperatures Below Zero Degrees F (-18C)
OVERVIEW:
This bulletin involves the installation of a new bypass valve and four 0-rings on the back of the radiator.
MODELS:
2007 (PM) Caliber
NOTE:
This bulletin applies to vehicles built before April 27, 2006 (MDH 0427XX).
SYMPTOM/CONDITION:
The customer may experience a high frequency sound from the engine compartment at temperatures below 0° F (-18° C) while the bypass valve is operating. This will be more noticeable at continuous speeds over 25 mph when the bypass valve has full flow.
DIAGNOSIS:
If the customer experiences the Symptom/Condition perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
1. Remove the battery following the procedures outlined in TechCONNECT. Refer to 8 - Electrical/Battery System/Battery - Removal.
2. Remove the four lines attached to the bypass valve (Fig. 1).
NOTE:
Discard the 0-rings on each of the lines. The new bypass valve comes with four 0-rings.
3. Remove the screw attaching the bypass valve to the Radiator (Fig. 1).
4. Install the new bypass valve (p/n 68021179AA) to back of radiator. Tighten screw to 5.1 N.m (45 In. Lbs.)
5. Replace the four 0-rings on the lines.
6. Install four lines to bypass valve and tighten lines to 18 N.m +/- 2 N.m (13.2 Ft. Lbs.)
7. Install the battery following the procedures outlined in TechCONNECT. Refer to 8 - Electrical/Battery System/Battery - Install.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.