Mishimoto High-Temperature Thermostat Most Dodge Cummins 5.9L / 6.7L Models

Mishimoto High-Temperature Thermostat Most Dodge Cummins 5.9L / 6.7L Models | 205°F Activation | Cooling System Upgrade

Overview

The Mishimoto High-Temperature Thermostat is a direct-fit replacement designed specifically for Dodge Cummins 5.9L and 6.7L diesel engines. This thermostat addresses common issues associated with aging factory units, such as premature coolant flow and inefficient engine warm-up. By increasing the activation temperature to 205 degrees Fahrenheit, it helps the engine reach optimal operating temperature faster, improving overall thermal management and reliability.

Engineered with precision and durability in mind, Mishimoto’s thermostat stands out for its superior craftsmanship and quality control. The higher activation temperature is carefully calibrated to balance quicker warm-up times without compromising cooling efficiency once the engine is at temperature. This design philosophy ensures that the thermostat performs reliably in a variety of conditions, especially in colder climates where faster engine warm-up is beneficial.

For Dodge Cummins owners, this thermostat upgrade means enhanced engine protection and improved fuel efficiency during cold starts. By restricting coolant flow longer, the engine avoids unnecessary wear caused by running too cool for extended periods. The Mishimoto High-Temperature Thermostat is a practical and reliable upgrade that supports the longevity and performance of your diesel engine.

Features & Specifications

This Mishimoto High-Temperature Thermostat is engineered for Dodge Cummins 5.9L and 6.7L engines and features a 205°F activation temperature. Constructed from high-quality materials, it delivers improved thermal management and faster engine warm-up for diesel enthusiasts seeking enhanced cooling system reliability.

• Brand: Mishimoto
• Product: High-Temperature Thermostat Most Dodge Cummins 5.9L / 6.7L Models
• Part Number: MMTS-RAM-99H
• Fitment: Most Dodge Cummins 5.9L / 6.7L Models
• Material: High-grade metal alloy
• Finish: Standard metal finish
• Construction: Precision engineered, direct-fit replacement
• Origin: Not specified
• Activation Temperature: 205°F (96°C)
• Factory Thermostat Activation: 190°F (1999-2010, 2013 trucks), 200°F (2010-2012 trucks)
• Warranty: Mishimoto Lifetime Warranty

Key Benefits

• Performance: Faster engine warm-up reduces wear and improves fuel efficiency during cold starts.
• Reliability: High-quality construction ensures consistent operation and long service life.
• Fitment: Direct-fit replacement designed specifically for Dodge Cummins 5.9L and 6.7L engines for hassle-free installation.
• Thermal Management: Higher activation temperature optimizes coolant flow timing for better temperature control.
• Durability: Built to withstand the demanding conditions of diesel engine cooling systems.
• Warranty: Backed by Mishimoto’s Lifetime Warranty for peace of mind.

What's Included

• 1× Mishimoto High-Temperature Thermostat for Dodge Cummins 5.9L / 6.7L Models
• Installation instructions

Installation & Compatibility

Installation of the Mishimoto High-Temperature Thermostat is straightforward for those with basic mechanical skills and common hand tools. It is a direct-fit replacement, requiring no modifications to the cooling system or engine components. However, professional installation is recommended if you are unfamiliar with coolant system servicing to ensure proper sealing and avoid leaks. This thermostat is compatible with most Dodge Cummins 5.9L and 6.7L models, but verifying fitment for your specific year and engine variant is advised before purchase.

• Professional Installation: Recommended for best results
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific Dodge Cummins model and year

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