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Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Mishimoto Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
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Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank

Mishimoto
MISMMRT-JL-18
840197726303
Coolant Reservoirs
Out of stock
$ 370.00 $ 335.95

SKU: MMRT-JL-18 | UPC: 840197726303

Mishimoto 2018+ Jeep Wrangler JL / 2020+ Gladiator JT (2.0L / 3.6L / 3.0L) Aluminum Coolant Expansion Tank

Replace the factory plastic coolant expansion tank prone to cracking in your 2018+ Jeep Wrangler JL or 2020+ Gladiator JT with this Mishimoto aluminum upgrade. TIG-welded construction delivers unmatched strength increased 46.5 fl oz capacity and internal baffling to prevent aeration during off-road abuse or track days. Expect reliable cooling heat resistance up to 300F and straightforward direct-fit installation for daily drivers and trail rigs alike.

Key Features

  • Heavy-Duty Aluminum Construction: TIG-welded aluminum design withstands high pressures temperatures and impacts replacing weak OEM plastic tanks.
  • Increased Capacity & Baffling: 46.5 fl oz volume (OEM 35.2 fl oz) with OEM-style baffles eliminates sloshing and air pockets on extreme angles.
  • Wrinkle Black Powder-Coated Finish: Resists corrosion road salt and engine bay chemicals while delivering clean rugged style.
  • Clear Sight Glass: Laser-etched min/max markings enable quick coolant level checks without cap removal or tools.
  • Direct-Fit Replacement: Bolts to factory locations on 2018+ Wrangler JL and 2020+ Gladiator JT with 2.0L Turbo 3.6L V6 or 3.0L EcoDiesel engines.
  • Includes 19 PSI Radiator Cap: Maintains system pressure for efficient cooling and boil-over prevention.
  • Lifetime Warranty: Mishimoto Lifetime Warranty includes Accident Protection for total confidence.

Product Notes

  • Engineered tested in USA to exceed OEM specs for off-road and performance use.
  • Laser-etched Mishimoto logo and markings ensure authenticity and precise readings.
  • MPN MMRT-JL-18 compatible with all listed engine variants no modifications needed.

Installation Notes

  • Direct bolt-on installation with OEM mounting points.
  • No cutting drilling or fabrication required installs in 1 hour with basic hand tools.
  • Complete kit includes tank sight glass 19 PSI cap fittings o-rings and hardware.

This Part Fits

Year Make Model Submodel
2018-2025 Jeep Wrangler JL Sport Sport S Sport S 4xe Unlimited Sport Unlimited Sport S Unlimited Sport Altitude Unlimited Willys Unlimited Willys Sport Willys Willys 4xe Rubicon Rubicon 4xe Rubicon X Rubicon X 4xe Sahara Sahara 4xe Sahara Altitude High Altitude High Altitude 4xe 80th Anniversary Freedom Islander Moab High Tide
2020-2025 Jeep Gladiator JT Sport Sport S Texas Trail Willys Willys Sport Altitude Launch Edition Mojave Mojave X Rubicon Rubicon X Overland Freedom High Altitude High Tide NightHawk Jeep Beach 80th Anniversary

Why Choose Mishimoto?

  • Proven track record in automotive cooling for Jeep enthusiasts worldwide.
  • High-quality materials and USA engineering for daily and extreme conditions.
  • Direct-fit precision from extensive vehicle-specific testing.

Frequently Asked Questions

  • Q: Why should I replace my stock coolant tank?
    A: The OEM plastic tank is known to degrade and crack over time this Mishimoto aluminum version is built for life-long reliability.
  • Q: Does this tank include a pressure cap?
    A: Yes a high-quality Mishimoto radiator cap is included.
  • Q: Is this compatible with the 3.0L EcoDiesel engine?
    A: Yes this tank fits all 2.0L 3.6L and 3.0L JL/JT variants.

Shipping & Handling

  • Method: Ground or expedited shipping options available
  • Availability: Usually ships within 1-2 business days
  • Packaging: Securely packed with protective foam box dimensions 10.2 x 7.5 x 5.4 inches
  • Weight: 2.2 lbs net weight 3.0 lbs shipping

Request For Information

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