Suspension - Various Noises From The From Strut Area
TIE Technical JournalTitle Front strut, Knocking or rattling noise from top bearing
Ref No US18381.7.0 en-GB
Issuer -
Partner 3 US 7510 Volvo Cars North America
Func Group 6110
Func Desc axle shaft, spring strut
Status Released
Status Date 2010-12-21
Issue Date 2010-12-17
Attachment
Vehicle Type
CSC
DTC
Text
CSC = Customer Symptom Code
DTC = Diagnostic Trouble Code
Note!
If using a printed copy of this Retailer Technical Journal, first check for the latest online version.
NOTE!
THIS DOCUMENT SUPERSEDES THE PREVIOUS RETAILER TECHNICAL JOURNAL 18381 DATED 01-08- 2010. Fault tracing has been improved. PLEASE UPDATE YOUR FILES.
DESCRIPTION:
There might be a knocking or rattling noise from the front struts when driving on uneven road or over speed bumps. Analysis has found some possible failure modes:
- Front coil spring in conflict with body strut tower (see RTJ 21323).
- Defective top bearing mainly due to separation of the top bearing and loss of ball bearings. Note that this could occur when replacing other parts in the front strut such as the spring aid (TJ 8708).
There may be a slight grinding noise when rotating a loose top bearing but it is not heard when the top bearing is installed in the vehicle since the bearing is under pressure.
Rotating the bearing without pressure will provoke a noise that is normal.
Rotating the bearing while applying some pressure and listening for noise is the proper way to diagnose the bearing.
SERVICE:
For a squeaking noise first refer to RTJ 8708 (spring aid) and RTJ 20109 (control arm hydro bushing).
For a rattling or knocking noise first refer to RTJ 21323 (coil spring in conflict with strut tower).
Check that all parts in the front strut are correctly assembled and that there are no loose connections. If needed use Chassis Ears toolkit to localize the noise.
Analysis of returned parts has shown that there is usually no need to replace the top bearing unless it has been accidently opened and the ball bearings have been lost. In that case replace the top bearing PN 31262470. See Figure 1 in the attachment.
MATERIALS:
Top bearing PN 31262470
VOLVO STANDARD TIMES GUIDE (VSTG) INFO:
Operation number 72304-2 - Coil spring remove / install (1 side) - See VSTG
Operation number 72308-2 - Coil spring remove / install (2 sides) - See VSTG
Operation number 99521-2 - Chassis Ear tool kit install/remove - 0.4 hrs
- Claims may be submitted under the new car warranty when there is a documented customer complaint using claim type: 01
- Labor times are valid at the time of release and are subject to change