Vanden Plas L6-4.0L (1990)
Subframe: All Technical Service Bulletins
Rear Subframe - Knocking Noise
64-17
Knocking Noise - Rear Subframe Bushing - Modification Procedure
MODEL:
1988-94 MY Sedan
DATE: 4/98
ISSUE:
If a knocking noise is reported as coming from the rear suspension, it is possible that the bushing has moved out of location in the rear suspension
subframe.
ACTION:
This bulletin provides a procedure for bonding in replacement subframe bushings in case of a customer complaint of a knocking noise from the rear
suspension.
REPLACING/BONDING SUBFRAME BUSHINGS
1.
Remove the subframe from the vehicle.
2.
Press out the old bushings from the subframe and thoroughly clean the bores and the surrounding areas.
3.
Place the subframe on a bench and stretch a line or measuring tape through the centers of the two bores, as indicated in Illustration 1, to indicate
the centerline.
4.
Place small squares of masking tape on the top face of each bore, under the line or tape. Mark the centerline, with pen or pencil, on the masking
tape.
Note:
When the bushing is installed the centerline should pass through the center of the two voids in the bushing, as shown in Illustration 1.
5.
Use a coarse grade of emery cloth to roughen the bore surface of the subframe and the corresponding outer surface of the replacement bushing. If
the surface of the bushing is not roughened sufficiently this may affect the integrity of the adhesive bond.
Note:
The next operation requires the use of an hydraulic press. At this point practice the procedure of installing the bushing to determine the relative
