Main Silencer - Vibrating Noise

Bulletin No.: 020/93
Issued: 5/19/93
Revised:

Applicable Model/s
1993 929

Subject
VIBRATING NOISE FROM THE
MAIN SILENCER

APPLICABLE VINS

1993 929 Models Vehicles with a VIN of JM1HD461*P0200001 through JM1HD461*P0205954.

DESCRIPTION





On some vehicles, when idling or accelerating around 2000 rpm, a vibrating noise may be heard from the main silencer's variable valve spring. The length of the spring for the variable valve has been modified to correct this condition.

REPAIR PROCEDURE

If the above condition exists, replace the variable valve spring with a modified part.

1. Raise the vehicle on a hoist.





2. Turn the valve spring collar clockwise to create some slack. Disconnect the variable valve cable from the valve spring collar.





3. With a flathead screwdriver or long nose pliers, release the valve spring from the main silencer as illustrated.





4. Remove the spring by uncoiling it from the valve collar as illustrated.

5. Install the modified valve spring by coiling it on the valve collar.

6. Attach the valve spring to the main silencer.

7. Connect the variable valve cable to the valve collar.





PARTS INFORMATION

WARRANTY INFORMATION
(Applies to vehicles covered under warranty)

Warranty Type Code: A
Customer Comment Code: 82
Damage Code: 9E
Part No. of Main Cause: JEY1 40 582
Operation No.: XX0539RX
Labor Hours: 0.4 Hrs.