Engine - Oil Leaks From Rear of Cylinder Block
13/1/9512/01/95/US
SUBJECT:
V8 Engine - Rear End Oil Leaks Diagnosis
MODEL:
Range Rover Discovery, Defender
AFFECTED VEHICLES:
All Vehicles
DETAIL
Oil leaks from the rear of the cylinder block could come from either:
a) The rear main seal
b) The camshaft gallery plugs
c) The camshaft bearing bore cup plug
Please consider the information below when diagnosing and repairing a vehicle with a rear engine oil leak.
ACTION REQUIRED
Upon customer complaint of an oil leak from the rear of the engine follow the procedure shown below to diagnose and repair.
PARTS INFORMATION
Rear Main Oil Seal (black): ERR 2640
Gallery Plug Thread Sealant: Loctite 242
Camshaft Bore Plug Sealant: Loctite 54041
(equivalents to the Loctite sealants may be used, call 1 800 Loctite for local supplier information)
PROCEDURE
Having investigated the oil leak and traced it to the rear of the engine, remove the transfer box and transmission (section 37, 41 and 44 of the Workshop Manual). Remove the drive plate/flywheel (refer to section 12 of the workshop manual) to gain access to the rear seal area of the block.
Establish the cause of the oil leak and follow the appropriate procedure.
A) Rear Main Seal Leaks
Examine the rear main seal for signs of leakage. An orange colored seal was used on Range Rover until RA641987. The seal is now black but functionally provides the same sealing performance. Do not condemn a seal simply because it is orange. Should it be necessary to replace a rear main seal, use Service Tool LRT54-A01 to extract the seal from its recess in the block and main bearing cap. Care must be taken to ensure that the seal journal or housing bore is not damaged.
Note:
It is not necessary to remove the oil pan or main bearing cap to remove the seal.
When installing a new seal first examine the seal recess for sharp edges or other irregularities which could damage the OD of the new seal. Use Land Rover Service Tool LRT-12-095 (old tool # RO.1014) to guide the seal lip onto the crank journal. Coat the tool and seal outside diameter with a film of clean oil before use. With the seal in position on the crank journal drift it into the block seal recess using Land Rover Service Tool LRT-12-091 until the tool bottoms out on the block/bearing cap face.
B) Camshaft Gallery Plug Leaks
If evidence of leakage is seen around the gallery plugs remove the plug(s), clean and reseal them with Loctite 242 or equivalent thread seal lock adhesive and torque to 37-44 ft.lb. (50-60 Nm)
C) Camshaft Bearing Bore Cup Plug Leaks
If a leak is found in this location, remove the plug, and install a new plug using Loctite 54041 or equivalent. Take care to make sure sealer is applied to the full perimeter of the new plug and that the block recess is clean and dry before fitting the plug. Drift in the plug until it is flush with the block.
WARRANTY
Normal warranty policy and procedures apply
Warranty information:
Rear Crankshaft seal check/replace all models:
12.21.89/28 Comp. Code: 1Q2N
05.70 hour Defender
05.90 hour Discovery Manual
06.20 hour Discovery Automatic
06.20 hour Range Rover
Camshaft bore plug reseal all models:
12.21.89./27 Comp. Code: 1S7N
using same times as above
Gallery plugs reseal all models:
12.21.89/26 Comp. Code: 1A3N
adding 00.10 hour to the above times