This task covers:
All except "A2" models
General mechanic's tool kit:
Drivebelts loosened (TM 9-2320-280-20).
General Safety Instructions
Cleaning will be done in a well-ventilated
area and a fire extinguisher will be kept
nearby when solvent is used.
This task is for 6.2 L engine rear main oil seal replacement only.
Disassembly of 6.5 L engine is necessary before replacing 6.5 L
engine rear main oil seal. Refer to TM 9-2815-237-34 for 6.5 L
engine rear main oil seal replacement.
Before replacement of seal, thoroughly inspect engine crankcase
ventilation system, tubes, rubber hoses, and CDR valve for
blockage which may have caused pressure build-up in crankcase
and seal failure. Correct as necessary.
Gently tap rear main bearing cap from engine with rubber or
Remove two long capscrews (9), two short capscrews (10), and main bearing cap (6) from engine block (3).
The rear oil seal may be a nylon rope or a neoprene rubber.
Perform step 2 for a nylon rope seal. Perform step 3 for a
The crankshaft may need to be rotated by front crankshaft bolt
to assist in seal removal.
Screw a sheet metal screw (1) into nylon rope seal (2). Using pliers, pull nylon rope seal (2) from
engine block (3) seal groove. Discard nylon rope seal (2).
Using pliers, pull seal (4) from engine block (3). Discard seal (4).
Remove seal (5) from rear main bearing cap (6). Discard seal (5).
Drycleaning solvent is flammable and will not be used near an
open flame. A fire extinguisher will be kept nearby when the
solvent is used. Use only in well-ventilated places. Failure to do
this may result in injury to personnel or damage to equipment.
Using drycleaning solvent, thoroughly clean the seal groove (8), oil relief slot (7), and engine block (3).