Mountain Off Road BBTJ9799 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 BBTJ9799 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 BBTJ9799 Block Brackets are designed to fit the following Jeep® vehicles: 1997-1999 TJ Wranglers
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 TJ
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
12x.125 metric hole
3/8-16x1-1/4
3 OEM Holes
New Holes 3/8x16
Depending on your year of TJ you may not have the
bracket attaching to your block as shown. If your TJ
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. 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, ( 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 motor mount and see 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.
Back Hole
FIGURE 3
3 OEM Holes
DS Block Bracket Installed
Coil Bracket
ALT. Bracket
Page 2
Loading...