GM Generation III & IV V8 Engine Mounts

for

TJ & LJ Wrangler Jeeps

Novak's engine mounts for the Jeep TJ & LJ Wranglers provide great strength and a precise GM Gen III+ V8 engine installation.

Weld-In Version, Replacing I4 & I6 Frame Brackets

LS Vortec Engine Mounts for TJ LJ Wrangler Jeeps, weld in

Kit MMTJ-G3, engine mounts, GM Gen III engines to TJ & LJ Jeeps, weld-in style, prepositioned

Kit contents:

  • Frame platform sets
  • Upper urethane bushings
  • Lower urethane bushings
  • Engine block plates
  • Fastening hardware
  • Instructions

This version of our TJ / LJ mount is for GM Gen III+ V8 engines, entirely replacing the existing Jeep I4 or I6 frame mount.

Removal of the factory frame mounts for both 2.5L I4 and 4.0L I6 engine Wranglers is required. This is best done with a separating disc, plasma cutter, torch, or reciprocating saw, followed up by a grinder or flap-wheel.

TJ Chevy Mounts welded in
The Novak frame bracket, as welded to the Jeep frame rail

Bolt-In Version, Replacing I6 Engines

GM LS Vortec mounts for TJ LJ Wrangler Jeeps

Kit MMTJ-G6, engine mounts, GM Gen III engines to TJ & LJ Jeeps, bolt-in, replacing the I6

Kit contents:

  • Frame platform sets
  • Upper urethane bushings
  • Lower urethane bushings
  • Engine block plates
  • Fastening hardware
  • Instructions

This version of our mount allows you to retain your 4.0L I6 engine frame horns when using a GM Gen III+ engine. Trimming of these factory frame horns is required, then they will be bolted through the top then drilled and bolted or optionally plug-welded at the flanks.

TJ Wrangler I6 4.0L frame bracket replacement
The Novak MMTJ-G6 frame bracket, as attached to the Jeep frame horn and the engine

Features

Ease of Installation

These mounts are available in either weld-in style or bolt-in style. Detailed instructions will guide to an ideal installation.

Strength

The Novak mounts feature thick 3/16” laser cut and CNC bent steel construction. Engineered using a welded box design geometry to provide maximum strength and assure that they will survive even the wildest V8's. When the option is available, we recommend the weld-in version for strength, simplicity and just a cleaner installation. If a welder is not available the bolt-in is an excellent option saving that step.

Vibration Isolation

Each mount kit comes with our high-grade urethane isolators that are specified for that ideal balance of isolation and firmness with the power of modern engines. Substantial 5/8” through bolts capture the assembly. Replacement bushing sets are available below should replacement ever be needed.

Compactness

Geometry of the mounts is compact to provide clearance for all stock components including the steering shaft with its pillow block and the recommended exhaust headers below.

Engine Mount Finish

The Novak frame bracket, as welded to the Jeep frame rail.

As the mounts are welded to the frame, any finish on the frame side brackets as well as the frame would be burned. you may enamel, powder coat or otherwise finish the bracketry and adjacent frame area to your own style. Engine plates are coated in a rust resistant finish but may also be painted.

Applications & Compatibility

Compatible Jeeps

  • MMTJ-G3: These mounts fit all 1997-2006 Jeep TJ / LJ Wranglers.
  • MMTJ-G6: These mounts fit all 1997-2006 Jeep TJ / LJ Wranglers originally equipped with the inline 6 only.

Compatible Engines

These mounts will fit the GM Gen III & IV LS / Vortec V8 engines.

Related Products


Radiator for LS Vortec engines in TJ LJ Wranglers
Electric cooling fan for TJ Jeeps
LS Vortec Headers for Jeep Swaps
Pilot bushings for Jeeps
JK Tachometer Emulator
Engine Mount Bushings, spares
GM Fuel Injection Pump for Wrangler TJ LJ Jeeps

Installation Requirements

Engine Placement

We have predetermined engine placement for the installer. There is a very fine window in which the GM Gen III & IV engines can properly fit into the TJ Jeep, and we've done this design legwork already.

Read Novak's detailed and most recently updated TJ Gen III & IV conversion instruction package as provided with our engine mounts.

Steering Bracket

These mounts feature an integrated platform for the reinstallation of your steering shaft carrier bearing bracket, as you may be removing the factory version. If installed correctly, the safety of your steering system will meet or exceed the factory specifications. Whether and how this is done varies with the original engine in your Jeep and the type of mount selected. Some (but not all) models use an additional spacer bracket that is supplied.

Also See