Mountain Off Road BBXJ9101 User Manual
MOUNTAIN OFF ROAD ENTERPRISES, INC.
P.O. BOX 690 DELTA COLORADO 81416
970-625-0500
970-625-3747 FAX
E-mail: info@mountainoffroad.com
www.mountainoffroad.com
INSTALLATION INSTRUCTIONS for BBXJ9101 BombProof™ BLOCK BRACKETS
HARDWARE KIT:
1– DS Block Bracket
1– PS Block Bracket
1– 12-.125x30mm Bolt, Flat Washer & Lock washer
6– 3/8-16x1 Bolt
3– 3/8-16x1-1/4 Bolt
1– 3/8-16x1-1/2 Bolt
1– 3/8-16x2 Bolt
2– 5/16-18x1-1/2 Bolt
11– 3/8” Flat Washers
11– 3/8” Lock Washers
2– 5/16” Flat Washers
2– 5/16” Lock Washers
1– Thin Spacer
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 BBXJ9101 Block Brackets are designed to fit the following Jeep® vehicles: 1991-2001 XJ Cherokees
equipped with 6-cylinder engines (4.0L ). These Brackets will work with the OEM motor mounts along with most
Aftermarket Motor Mounts.
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. We recommend doing one side at a time.
STEP 2: On the drivers side remove the through bolt, lower nut and bolt on the motor mount and then
remove the motor mount. Save this hardware! remove the OEM block bracket. The new Block Bracket will reattach to the block using the original three holes plus four additional threaded holes on the block. We recommend
cleaning the new holes with a 3/8”x16 tap and the rearmost lower hole will need to be cleaned using a
12mmx.125 tap. ( see figure 1)
STEP 3: Install the new DS Block Bracket and motor mount together, attach the block bracket using the
supplied hardware using loc-tite on the bolts, ( See Figure 2 for bolt locations) depending on the year of your XJ
you may need to install the supplied thin spacer ( See Figure 1 ). Do not tighten the bolts yet. Reinstall the original
motor mount bolts and nuts and check to see if the motor mount is in the same location as before, if not the block
bracket can be moved slightly to realign the mount to the frame bracket. After the alignment is correct tighten the
block bracket bolts and the bolt and nut on the motor mount. Do not Tighten the through bolt on the motor
mount at this time.
STEP 4: On the Passenger side Remove the through bolt, lower nut and bolt on the motor mount and
then remove the motor mount. Save this hardware! remove the OEM block bracket. The new Block Bracket will
reattach to the block using the original three holes plus four additional threaded holes on the block. We recom-
mend cleaning the new holes with a 3/8”x16 tap and the. ( see figure 3 )
Page 1
FIGURE 1 FIGURE 2
3 OEM Holes
3/8-16x1-1/4
12x.125 metric hole
New Holes 3/8x16
Depending on your year of XJ you may not have the
bracket attaching to your block as shown. If your XJ
does not have this bracket install the thin spacer between the block and bracket.
3/8-16x1
3/8-16x1.5
12-.125x30mm
STEP 5: You will need to remove the coil bracket from the block , the lower Alt. bracket bolt and if equipped
the starter cable retainer bracket. It may also be easier to remove the wiring from the back of the Alt. to gain access
for the new longer bolt. ( see figure 4 ) Install the new PS Block Bracket and the Motor mount together, attach the
block bracket using the supplied hardware using loc-tite on the bolts, This is a tight fit and may require lifting the engine up higher on this side and loosening the AC line filter for access. ( See Figure 5 for bolt locations). The coil
bracket will be reinstalled on top of the new bracket ( do not forget the ground wires), The new bracket will also set
on top of the Alt. bracket on the lower forward hole. Do not tighten the bolts yet. Reinstall the original motor mount
bolts and nuts and check to see if the motor mount is in the same location as before, if not the block bracket can be
moved slightly to realign the mount to the frame bracket. The DS bracket has a slotted hole for the through hole on
the motor mount this is to help align the mounts side to side. After the alignment is correct tighten the block bracket
bolts and the bolts and nut on the motor mount. Go back and tighten the DS through bolt.
FIGURE 3
Coil Bracket ALT. Bracket
3 OEM Holes
Back Hole
Page 2
FIGURE 4
A/C Line Filter equipped
on earlier XJ’s
Alt. Wiring
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