3.7L / 4.0L Cooling Upgrades
Killerglass Upper Radiator Hose Kit: Jeep Grand Cherokee 2005 - 2023 (V8 Only)
KillerGlass
Regular price from $169.00 15% off
- Unit price
- /per
Mishimoto Thermal Bypass Valve Kit (FRONT): Fits Chrysler/Dodge/Jeep/Ram 2006-2019 NAG1
Mishimoto
Regular price
$164.00
$148.95
9% off
- Unit price
- /per
Spec D Aluminum Radiator: Jeep Grand Cherokee 4.0L w/ Automatic Transmission 1999 - 2004
Spec D
Regular price
$274.00
$203.00
26% off
- Unit price
- /per
Holley Replacement Water Neck Seal: Fits Most Dodge / Jeep / Ram Models (2003-2023)
Holley
Regular price
$4.46
$2.18
51% off
- Unit price
- /per
HPS Silicone Radiator & Heater Hoses Kit: Jeep Wrangler TJ 4.0L I6 2002 - 2006
HPS
Regular price from $252.00 Up to 13% off
- Unit price
- /per
3 colors
HPS Silicone Heater Hoses Kit: Jeep Wrangler TJ 4.0L I6 2002 - 2006
HPS
Regular price from $124.00 Up to 13% off
- Unit price
- /per
3 colors
HPS Silicone Heater Hoses Kit: Jeep Wrangler TJ 4.0L I6 1997 - 2001
HPS
Regular price
$149.50
$130.00
13% off
- Unit price
- /per
3 colors
HPS Silicone Radiator Hoses Kit: Jeep Grand Cherokee 4.0L I6 1999 - 2004
HPS
Regular price
$171.35
$149.00
13% off
- Unit price
- /per
3 colors
HPS Silicone Radiator Hoses Kit: Jeep Wrangler TJ 4.0L I6 2000 - 2006
HPS
Regular price from $155.00 Up to 13% off
- Unit price
- /per
3 colors
HPS Silicone Radiator & Heater Hoses Kit: Jeep Wrangler TJ 4.0L I6 2000 - 2001
HPS
Regular price from $241.00 Up to 13% off
- Unit price
- /per
3 colors
HPS Silicone Radiator Hoses Kit: Jeep Grand Cherokee 3.7L V6 2005 - 2010
HPS
Regular price from $174.00 Up to 13% off
- Unit price
- /per
3 colors
HPS Silicone Radiator & Heater Hoses Kit: Jeep Grand Cherokee 4.0L I6 1993 - 1998
HPS
Regular price from $209.00 Up to 13% off
- Unit price
- /per
3 colors
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Cooling Upgrades for 3.7L V6 and 4.7L V8 Engines
The 3.7L V6 and 4.7L V8 engines are reliable powerplants commonly found in Dodge, Jeep, and Ram vehicles, known for their balance of capability and durability. Upgrading the cooling system on these engines is essential to maintain optimal operating temperatures, especially during heavy towing, off-road use, or performance driving.
Why upgrade cooling components on your 3.7L or 4.7L engine?
Both the 3.7L and 4.7L engines benefit from enhanced cooling to prevent overheating and reduce thermal stress on engine components. Stock cooling systems can struggle under increased load or in hot climates, leading to reduced performance and potential engine damage. Upgrading cooling parts helps maintain consistent temperatures and extends engine life.
- Improved heat dissipation reduces risk of overheating
- Supports higher power output and towing demands
- Enhances reliability during extended heavy use
- Helps maintain stable operating temperatures in harsh conditions
Key cooling upgrades for the 3.7L and 4.7L platforms
Effective cooling upgrades include high-capacity radiators that increase coolant flow and performance water pumps that ensure consistent circulation. Upgraded thermostats provide more precise temperature regulation, while electric or mechanical cooling fans improve airflow through the radiator, especially at low speeds or idle.
Choosing the right cooling parts for your 3.7L / 4.7L engine
Selecting cooling upgrades tailored to your engine platform ensures proper fitment and optimal performance. Whether you’re upgrading for towing, off-road, or daily driving, FastHemis offers a range of radiators, water pumps, thermostats, and fans designed specifically for the 3.7L and 4.7L engines. Shop our collection to keep your engine running cool and reliable.