GM Gen. III & IV Small Block V8 Engine Mounts
for
XJ Cherokee & MJ Comanche Jeeps
Building the perfect GM LS Vortec Gen III+ engine mount for the unibody XJ & MJ Jeeps was an engineering feat. After several relentless renditions, installations and tweaks, these mounts are as close to perfect as we know how to make them.
Kit contents:
- Frame bracket weldments
- Engine plates
- Isolators, upper and lower
- Fastening hardware
- Instructions
Ease of Installation
These mounts are bolt-in style and detailed instructions (see the PDF link below) will guide to an ideal installation. We do recommend a weld be placed on these mounts on the top lip (and sides too if you would like) for the best strength achievable.
Strength
The Novak mounts feature thick 3/16" laser cut and CNC bent steel construction. The formed frame brackets hug the Jeep unibody frame, creating a plate steel overlay that will add rigidity to this most important part of the Jeep frame. Generous welds, smart geometry and multiple attachment points will attest to their strength.
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
your engine mounts arrive in a black zinc, rust resistant finish but may also be painted to suit your installation.
Applications & Compatibility
Compatible Jeeps
These mounts fit all 1984-2001 XJ Cherokee, XJ Wagoneer & MJ Comanche platform Jeeps.
Compatible Engines
These mounts will fit the GM Gen III & IV LS/Vortec V8 engines. *Note, that stock truck style intakes and accessory brackets will not clear the hood on these applications.Vortec engines will require Corvette style intakes and accessories for hood clearance, power steering gear clearance, cooling fan clearance, and best overall layout for an XJ / MJ. However, we do recommend the truck style oil pans. Please read the installation links below for more information.
Gen V engine mounts are also available. Contact us for these.
Customer Dean N. and his late 1990's XJ with LS Engine
Related Products
Installation Requirements
Unbolting and removal of the factory frame mounts for factory engines is required. Steering remains as per factory. A lift kit and bump stops may be required to correct for sagging factory springs and clearance requirements for your GM oil pan. This and many other important details are covered in our provided instructions.
Placement
These mounts are a purely bolt-in design. Once the old mounts are removed and the engine bay is cleared and prepped, the #MMXJ3 mounts can be installed rapidly. All fastening hardware is provided. The installer will need to have a 7/16-14 tap to thread a blank body insert.
Also See
- GM Engine Swaps into XJ / MC Cherokee & Commanche Jeeps, 1984-2001
- About the GM Generation III+ V8 1997+ (LSx, Vortec, etc.)
Image Gallery
Installer C. Lambski and his 2-door XJ
4Lo's Rich Klein and his XJ with LS engine, topped with a Holley Terminator intake and control system
The Lambski Cherokee with LS powertrain in the foreground
A Corvette style alternator and power steering arrangement in the Nesbitt Cherokee
Battery, hose, AC and cooling system in the Klein XJ