Mountain Off Road JM603 User Manual
Mountain Off Road For the car
Please read and understand all instructions before beginning the installation of these motor mounts. Please read
the terms and policies on the back of these instructions.
The JM600 & JM603 motor mounts are designed to fit the following Jeep® vehicles: 1987-1995 YJ Wranglers
equipped with 6-cylinder engines (4.0L or 4.2L), 1997-2003 Jeep® TJ Wranglers equipped with 4.0L & 2.5L en-
gines, 1987-2001 Jeep® XJ* (Cherokee), MJ* (Comanche) equipped with 4.0L engines. The Left & Right
mounts are the same. A increase in engine vibrations will be noticed with the 2.5L engines!
STEP 1:
With the Jeep® on flat level ground, apply the parking brake, block the tires so it cannot move.
Put the transmission in neutral. Using a jack, place a block of wood between the jack and the oil pan. Apply a
slight amount of pressure on the oil pan.
STEP 2:
Remove the drivers side stock motor mount. ( If your bolt comes in from the front then remove
the Block Bracket and Motor Mount Together , Reverse the bolt on reassembly). Save the hardware that you re-
moved because it will be re-used. Install the BombProof™ motor mount in it’s place. Do not tighten any of the
nuts or bolts at this time. If your vehicle has a aftermarket suspension lift kit that uses spacers between the skid
plate and frame to lower the transfer case, this can cause the motor mounts to be slightly out of alignment. If you
have trouble lining-up the thru-bolt, it may be necessary to temporarily un-bolt the transmission mount from the
skid plate and raise the transmission up slightly until the thru-bolt lines up.
STEP 3:
Remove the stock motor mount from the passenger side of the engine. Install the BombProof™
motor mount in it’s place. Re-use the stock hardware. Do not tighten the nuts or bolts yet. If you had un-bolted
the transmission mount from the skid plate in step 2, you can now lower it back into place and tighten the bolts
that you removed.
STEP 4:
Tighten the bolts and nuts on the bottom of the BombProof™ motor mounts to factory specs.
Tighten the thru-bolts on the engine mounting “fork” to factory specs. Remove the floor jack. Check all of the
hardware for proper torque specs after 50 miles and every off-road use. Thank you for purchasing your Bomb-
Proof™ motor mounts from M.O.R.E.™.
MOUNTAIN OFF ROAD ENTERPRISES, LLC.
P.O. BOX 690 DELTA, COLORADO 81416
970-625-0500
970-625-3747 FAX
[email protected]
www.mountainoffroad.com
INSTALLATION INSTRUCTIONS
for
JM600 & JM603 BombProof™ MOTOR MOUNTS