Excessive drive line vibration

EXCESSIVE DRIVE LINE VIBRATION

Model

All Range Rover V8 All Discovery V8

Affected vehicles

Range Rover from LH 647645 to LH 652714 Discovery from LJ 081991 to LJ 099423

Date

1994-07-14

Reference

14/07/94

Bulletin text

SUBJECT Excessive Drive Line Vibration 30 to 40 mph (48 to 64 Kph)

MODEL AFFECTED VEHICLES

All Range Rover V8 Range Rover from LH 647645 to LH 652714 All Discovery V8 Discovery from LJ 081991 to LJ 099423

DETAIL

A number of reports have been received which detail drive line vibration from 30 to 40 mph (48 to 64 Kph) within the VIN's identified above. The vibration is transmitted into the vehicle cabin from the front axle assembly under moderate to light load conditions. The rubber composition in the right hand engine mounting and the harmonic damper rubber mounting has been optimised to eliminate vibration. this change was introduced onto production at Discovery LJ 099423 and Range Rover LH 652714. The new optimised condition can be retrospectively fitted to vehicles that exhibit this particular drive line vibration.

ACTION REQUIRED

On customer complaint follow the procedure listed below. If this condition is not corrected following the actions identified below please submit a Product Report

PARTS INFORMATION

Engine mounting (right hand side-starter motor side) ANR 2803 replace with ANR 2804

Harmonic damper rubber mounting ANR 2803 replace with ANR 2804.

PROCEDURE

Reference should be made to the appropriate section of the workshop manual where required.

1) Disconnect the battery negative terminal. 2) Remove the harmonic damper rubber mounting and replace with ANR 2804. Due to a running change in stud size on the new rubber mounting it will be necessary to drill both the harmonic damper weight and mounting support bracket to 12 mm diameter. 3) Replace the right hand engine mounting (starter motor side) with ANR 2804. NOTE: -It is easier to remove the engine mounting support bracket complete with rubber and refit as an assembly. Care must be taken when raising /supporting the engine to ensure no cables or pipes are put under tension, pay particular attention to the clearance between the fan and radiator cowl. 4) Mark the harmonic damper with a white paint dot to signify modification has been made.

14/07/94

01/13/94/EN

WARRANTY

Normal warranty policy and procedures apply

COMP. CODE

5C1W Engine mounting Harmonic damper 4N9W

SRO

12.45.03 - Engine mounting - renew 00.45 hour 54.15.89/26 - Harmonic damper-remove/refit 00.45 hour 54.15.89/27 - Harmonic damper-modify 00.20 hour