Centre plate/extension housing oi leak

CENTRE PLATE/EXTENSION HOUSING OI LEAK

Model

Range Rover Discovery Defender

Affected vehicles

All manual gearbox derivatives between LH 647645 to LH 649736 - LJ 081991 to LJ 088201 - LD 939976 to LD 942618

Date

1994-05-11

Reference

11/05/94

Bulletin text

SUBJECT Centre Plate/Extension Housing Oil leak - R380 Gearbox

MODEL AFFECTED VEHICLES

Range Rover All manual gearbox derivatives between LH 647645 to LH Discovery Defender 649736 - LJ 081991 to LJ 088201 - LD 939976 to LD 942618

DETAIL

A number of reports have been received which detail oil leaks from the centre plate and extension housing joint. At the VIN's identified above a new manufacturing process was implemented that eliminated the use of conventional gaskets and introduced liquid sealant Hylogrip 2000. Investigation by Land Rover engineers found that the cause of these oil leaks can be attributed to insufficient sealant applied to the joint faces of mating parts.

ACTION REQUIRED

Upon customer complaint of oil leaks from this area or if identified during routine servicing follow the procedure below.

PARTS INFORMATION

STC 611 Hylogrip 2000 sealant.

PROCEDURE

Remove the gearbox from the vehicle refer to section 37 of the workshop manual. (Refer to Bulletin 37/01/94 for gearbox dismantling procedures)

Carefully remove the extension housing ensuring that the main case/centre plate joint is not disturbed. (If there is any doubt both sides of the centre plate will have to be resealed). The joint faces should be cleaned and checked for damage, any high spots noted can be carefully removed using a fine file. Apply a continuous 3 mm bead of sealant around the joint faces and ensure there is an overlap at the start and finish point of the bead. Re-assemble extension housing and refit gearbox. Refer to bulletin 37/01/94 for tightening torques.

11/05/94

37/04/94/EN

WARRANTY

Normal warranty policy and procedures apply.

COMP. CODE

3R4N

SRO

37.12.01/01 Extension housing-rear-remove-reseal and refit: Discovery 300Tdi - 07.05hour / V8 - 07.75 hour Range Rover 300Tdi - 07.05 hour / V8 - 07.75 hour Defender 300Td i - 06.20 hour / V8 - 06.75 hour