Condition #2 (Chevrolet Cobalt, HHR and Pontiac G5 Only)
Some customers may comment on a clunk or thump noise coming from the front suspension while driving over rough road surfaces. This noise will typically occur when the front suspension is returning to the upward position after a hard downward stroke, such as after driving through a large rut or pothole.
Cause #2
This condition may be caused by the jounce bumper slamming into the upper spring seat because it is not retained in the correct up position. The jounce bumper loses position due to oil being deposited onto its retention fingers. The oil is from the strut leaking.
Correction #2
Inspect the front strut(s) for evidence of oil. The leak may be slight but will still cause the concern. If oil is present, replace the affected strut, jounce bumper and dust boot (shield). Before reassembling the strut assembly, glue the new jounce bumper and new dust boot (shield) to the upper spring seat using the steps listed below. To further confirm this concern, the shield/bumper will easily slide up and down the strut shaft.
This image has been resized. Click this bar to view the full image. The original image is sized 503x464 and weights 88KB.
Clean the surface area of the upper spring seat using fine sandpaper.
Apply a light coat *of 3Mâ„¢ Automotive Adhesion Promoter, P/N 06396, to the top of the dust boot (shield) on the inside edge and to the top of the bumper. Allow to dry 10 minutes.
This image has been resized. Click this bar to view the full image. The original image is sized 503x436 and weights 49KB.
Glue the bumper to the inside of the dust boot (shield) as shown. Use *3Mâ„¢ Duramixâ„¢ Super Fast Adhesive, P/N 04747. Allow to cure thoroughly 5-10 minutes at room temperature.
Apply a light coat of *3Mâ„¢ Automotive Adhesion Promoter, P/N 06396, to the top of the dust boot (shield) and to the upper spring seat surface. Allow to dry 10 minutes.
This image has been resized. Click this bar to view the full image. The original image is sized 503x399 and weights 56KB.
Glue the dust boot (shield) to the upper spring seat as shown using the above recommended adhesive. Allow to cure thoroughly.
*We believe this source and their products to be reliable. There may be additional manufacturers of such products. General Motors does not endorse, indicate any preference for or assume any responsibility for the products from this firm or for any such items which may be available from other sources.
Parts Information #2
Part Number
Description
Qty
Material Allowance
21992520
Shield, Frt Suspension Strut
-
-
22712118
Bumper, Frt Suspension Strut
-
-
04747
3Mâ„¢ Duramixâ„¢ Super Fast Adhesive
1
$22.00
06396
3Mâ„¢ Automotive Adhesion Promoter
2
$4.00
For part numbers and usage of the strut, see Strut Kit in Group 07.345 of the appropriate Parts Catalog.
Warranty Information #2
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
E9478*
Replace Front Strut and Secure Bumper and Shield to Spring Seat
1.5 hrs
Add
To Perform Repair on Other Side
1.3 hrs
Add
For alignment times, refer to operation E2020 and add the applicable times to the regular hours.
* This is a unique labor operation for bulletin use only. The number will not be published in the Labor Time Guide.