Novak Heavy Duty Radiator

for

2007-2018 JK Jeeps

This is the innovative Novak HD JK Wrangler radiator for GM Gen III+ conversion engines in 2007-2018 JK Series Jeeps.

The cross-flow design radiator is manufactured from aluminum which has proven to be a much lighter, stronger and more efficient radiator cooling material. Tanks are CNC laser cut, bent and fabricated with billet aluminum fittings. The core features a single row of 1-1/2" wide tubes utilizing maximum fin density with louvered fins for optimal cooling capacity. These assemblies are TIG welded with the finest craftsmanship and pressure tested to exceed even high-pressure systems. Our radiators are designed to facilitate the maximum amount of cooling possible in a narrow Jeep grille.

Why a single row radiator? Through extensive in-house testing of past designs, and other leading competitors' radiators, we found the widest possible single row of maximum row density to be the most efficient. With multi row radiators, airflow becomes turbulent between rows, decreasing airflow and in turn decreasing efficiency. We are confident this is one of the best conversion radiators on the market.

Recommended Fan & Controller

The 2012-2018 OEM JK Pentastar fan delivers terrific airflow and slides directly into the mounting tabs of our JK radiator. This was an important upgrade in power and reliability for Jeep over even the previous JK electric fan. See Related Products, below. It's watertight, durable, efficient, and most importantly: variable speed. As the engine begins to heat up, the fan slowly increases speed to deliver exactly as much cooling as needed. This in turn puts less stress on your electrical system and keeps the engine bay from heat soaking in between standard fan cycles. With lower under hood temps, sensors, hoses, gaskets and various other components lives are extended, improving the reliability of your Jeep.

If you have a 2007-2011 model radiator fan, we recommend sourcing a 2012-2018 JK Pentastar fan instead. To identify what fan you have, the 2007-2011 fans use a purple signal wire, while the 2012-2018 fans use a green activation wire.

In order to run the 2012-2018 JK Pentastar fan, we recommend Novak's E-PWM controller. Historically, engine fans would run at 100% or off, causing them to constantly cycle on and off, sending the engine through countless heat cycles and putting a heavy draw on your vehicles electrical system.

Getting this fan to run standalone has been made easy with Novak's E-PWM JK fan controller. The fan will only work when a specific PWM signal is input through its green signal wire, usually supplied via the JK's TIMP. Novak's E-PWM controller takes the engine temperature from a standard GM temp sender and creates this specific signal to run the Pentastar fan exactly how your GM engine requests.

The E-PWM also comes with low and high speed command wires that can be used with selectable 0v or 12v signals. These are commonly used for A/C fan activation or dash switches to manually override fan speeds.

Radiator Mounting

The Stock JK radiator mounting system a good design and the Novak JK radiator drops right into the factory JK chassis for a plug and play solution.

Transmission Cooling

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 Related Products, below.

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