Novak's HD cross-flow radiator for 1987 - 2001 Jeep CJ's is made to be the most innovative on the Jeep aftermarket. Jeep engine swappers have the challenge of keeping more powerful engines cool within the confines of one of the smallest grill spaces in the automotive industry.

These radiators are fabricated in-house at Novak since 2012, where we have relentlessly pursued radiators which have:

• Maximum heat exchange with one 1-1/2" wide tubes in alloy aluminum
• Durability
• Unmatched features; each radiator assembly includes:
• Floating design on pads within the Jeeps framework
• Industry standard inline filler neck and radiator cap, for easy future replacement
• Standard drain fitting, accessible with a wrench
• Sacrificial anode (however, you should still ground your radiator to prevent corrosion!)
• Simple, barbed overflow fitting
• Bungs for temperature senders and steam ports
• Ideal fin density with louvers
• Furnace brazed headers and TIG welded final assembly
• Every radiator pressure tested, heat imaged and empirically scored for maxium heat exchange

Our radiators do not feature integrated transmission coolers, as we choose to focus the unit's entire cooling power on the engine. More on this, below.

For XJ and MJ models, the fan shroud is now permanently integrated into the radiator assembly. This means superior structural integrity, simplified installation, and optimized cooling. Because the shroud is not available separately, these radiators are sold as radiator-and-shroud assemblies. The electric fans can be ordered with the radiator as a complete kit, or on their own.

Engine Versions

Each radiator is built for a specific engine family, with the inlet and outlet placed to match. Select your engine in the dropdown above.

For Generation I-II Chevrolet Engines

The classic Small Block Chevy version of our radiator features the 1-1/2" diameter top inlet on the driver's side and the lower 1-5/8" outlet on the passenger's side.

Need engine mounts for this swap?

For Generation III+ Chevrolet Engines

The LS version of our radiator features a 1-1/2" diameter top inlet on the passenger's side and the lower 1-3/8" outlet on the passenger's side.

Need engine mounts for this swap?

For Ford Small Block V8 & AMC V8 Engines

The Ford & AMC version of our radiator features a 1-1/2" diameter top inlet on the passenger's side and the lower 1-5/8" outlet on the driver's side.

Kit Contents

• Radiator
• Radiator cap, 16lb
• Filler, inline filler neck
• Plugs, brass, 3/8" NPT
• Fitting, barbed, 1/4 x 1/8 NPT, overflow
• Washers, mounting
• Anode, sacrificial

Coolant & Water Wetter

Your Novak radiator is aluminum, and the coolant needs to suit the radiator — not the cast-iron radiator your donor engine may have originally run behind. We recommend Zerex™ G05, a HOAT (Hybrid Organic Acid Technology) antifreeze that protects aluminum while staying safe on any iron or copper parts elsewhere in your cooling system. It comes premixed 50/50, so there’s no diluting a concentrate or guessing a ratio.

Red Line Water Wetter is a surfactant additive that reduces the surface tension of the coolant, letting it make better contact with the metal in your radiator and engine for improved heat transfer. It’s an inexpensive upgrade for a Jeep that works hard at low speed or off-road.

Both can be added to your radiator order with the dropdowns above, along with our polished stainless overflow tank.

More Details

Integrated Auto Transmission Coolers?

Because modern engines run a bit hotter than earlier engines and automatic transmissions prefer to be kept at cooler temperatures, we at Novak have decided to offer radiators without an integrated automatic transmission cooler option. These coolers are more effective run as separate units. This is a method that is confirmed by trends in the OEM automotive industry. See our preferred transmission cooler in Related Products, below.

1984-1986 Versions

These assemblies are designed to fit the 1987 to 2001 XJ / MJ models with engine conversions appropriate to the radiator selected. 1984 to 1986 XJ's feature a grill support assembly that is not will not work with this radiator (nor V8 engine conversions, for that matter) and will require that the installer fit the later style front structure and radiator support from a salvage Cherokee for this radiator and the conversion to succeed.

Eliminating the Remote Fill Bottle

For 1984 to 1996 Cherokees which currently feature the remote fill pressure bottle, this new radiator will convert you to the improved system that places the filler neck in the upper radiator hose. your engine bay will be less cluttered, simplified and there is less risk of engine damage due to air pockets inherent to the complexity and design flaws of the earlier systems. The elimination of this headache will be welcomed along with increased reliability of the Jeep's cooling system.

Integrated Shroud

Our latest XJ / MJ KryoFlow radiators now feature a fully integrated fan shroud. The shroud is welded directly to the radiator assembly during production, resulting in a rugged, compact unit, and it is built to carry our triple electric fans for excellent airflow and maximum cooling performance.

Because the shroud is permanently joined to the radiator, the radiator and shroud must be purchased together as a complete assembly. This change simplifies installation and increases long-term durability, especially in demanding off-road conditions.

Click here for our radiator fan shrouds.

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