Mishimoto 90 Degree Thermostat with Housing 12-18 Jeep Wrangler JK | 194°F Opening Temperature | Cooling System Thermostat

Overview

The Mishimoto 90 Degree Thermostat with Housing is a critical cooling system component designed specifically for the 2012-2018 Jeep Wrangler JK 3.6L. This thermostat regulates engine temperature by controlling coolant flow, preventing overheating and protecting your engine from potential damage caused by faulty or inconsistent temperature management. It’s an essential upgrade for Jeep owners looking to maintain optimal engine performance and reliability under various driving conditions.

Engineered with precision, this thermostat features an upgraded aluminum housing that offers superior durability compared to stock plastic housings. The galvanized steel bleeder screw enhances corrosion resistance and allows for efficient air bleeding during coolant system maintenance. The thermostat itself opens at approximately 194°F, closely matching the factory specification of 203°F, ensuring your cooling system operates as intended without premature or delayed coolant flow.

For Jeep Wrangler JK owners, maintaining proper engine temperature is vital for longevity and performance, especially when tackling off-road conditions or heavy-duty use. The Mishimoto thermostat’s consistent wax-based operation guarantees reliable temperature control, reducing the risk of overheating and improving overall cooling efficiency. This component is a practical upgrade that blends durability with precise thermal management, tailored to the demands of Jeep enthusiasts.

Features & Specifications

This Mishimoto thermostat with housing is engineered for the 2012-2018 Jeep Wrangler JK 3.6L and features a 194°F opening temperature. Constructed from high-quality aluminum and galvanized steel, it delivers enhanced durability and reliable thermal regulation for Jeep owners seeking dependable cooling system performance.

• Brand: Mishimoto
• Product: 90 Degree Thermostat with Housing
• Part Number: MMTS-WRA-12E
• Fitment: 2012-2018 Jeep Wrangler JK 3.6L
• Material: Aluminum housing, galvanized steel bleeder screw
• Finish: Natural aluminum
• Construction: Precision machined housing with wax thermostat
• Origin: Not specified
• Opening Temperature: Approximately 194°F
• Warranty: Mishimoto Lifetime Warranty

Key Benefits

• Durability: Upgraded aluminum housing resists cracking and warping common with stock plastic housings.
• Reliable Temperature Control: Wax-based thermostat opens near factory temperature for consistent coolant flow and engine protection.
• Corrosion Resistance: Galvanized steel bleeder screw prevents rust and facilitates efficient air bleeding during maintenance.
• Engine Protection: Prevents overheating and potential internal engine damage by maintaining proper operating temperature.
• Fitment Precision: Designed specifically for Jeep Wrangler JK 3.6L models from 2012 to 2018 for direct replacement.
• Warranty Support: Backed by Mishimoto’s Lifetime Warranty, ensuring long-term quality and peace of mind.

What's Included

• 1× Mishimoto 90 Degree Thermostat with Aluminum Housing
• 1× Galvanized Steel Bleeder Screw
• Installation instructions

Installation & Compatibility

Installation of the Mishimoto thermostat with housing is straightforward for those with basic mechanical skills and standard hand tools. The part is a direct bolt-on replacement for the 2012-2018 Jeep Wrangler JK 3.6L models, requiring no modifications. Bleeding the cooling system after installation is recommended to remove trapped air, facilitated by the included bleeder screw. No tuning or additional calibration is necessary since this is a mechanical thermostat replacement.

• Professional Installation: DIY-friendly for experienced enthusiasts; professional installation recommended if unfamiliar with cooling system service.
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific Jeep Wrangler JK year and engine variant before purchase.

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