Engine Performance - Rough Idle

12-47
AMENDED
6/95

Rough Idle - Install Softer Front Engine Mounts

MODEL
Sedan (4.0L) Range
Up to VIN 683923

DATE 1/94

Remove and destroy Bulletin 12-47 Amended 1/95, Date 1/94.

Replace with this Bulletin.

Revisions are marked with a bar and indicated in Bold Text.

ISSUE:

To reduce engine vibration on 4.0L Sedans when the engine is idling in "Drive," softer front engine mounts have been introduced on production vehicles beginning with VIN 683924. Factory installed soft engine mounts are marked with paint; the right side mount is marked with orange paint, the left side mount is marked with brown paint.

The new engine mounts can be installed on earlier 4.0L sedans. Soft mounts from parts stock have a unique number but are not marked with paint

ACTION:

For customer complaints of engine vibration or rough idle in "Drive" on 4.0L sedans up to VIN 683923, install new left and right engine mounts using the part numbers below.

For replacement procedures, refer to the XJ6 Service Manual sections 12.45.01 and 12.45.03.

WARRANTY INFORMATION:





Warranty claims for this repair may be submitted for vehicles within the normal warranty period.

PARTS INFORMATION:

PART NUMBER DESCRIPTION QTY.
MMB 7520BA Right side engine mount 1
MHC 7521AA Left side engine mount 1