Mishimoto Low-Temp Thermostat

1994–1998 Dodge Ram 2500 / 3500 5.9L Cummins Diesel

Part #: MMTS-RAM-94L

Overview

The Mishimoto Low-Temperature Thermostat is a precision-engineered cooling system upgrade designed specifically for Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L Cummins diesel engine from 1994 to 1998. This thermostat replaces the factory unit with a lower activation temperature of 174°F, compared to the stock 180°F thermostat. By opening earlier, it allows coolant to circulate sooner, reducing engine operating temperatures and enhancing overall cooling efficiency.

Ideal for drivers who frequently tow heavy loads, operate in hot climates, or demand improved thermal management, this thermostat helps prevent overheating and protects engine components from heat-related damage. Built to meet or exceed OEM standards, the Mishimoto Low-Temperature Thermostat ensures reliable performance and durability backed by a lifetime warranty.

Key Features

Engineered to optimize cooling performance and durability, the Mishimoto Low-Temperature Thermostat offers the following benefits:

• Lower activation temperature of 174°F for earlier coolant flow and improved temperature regulation
• Direct-fit replacement for easy installation with no modifications required
• Enhanced engine cooling under heavy load, towing, and demanding driving conditions
• Durable construction designed to withstand high thermal cycling and harsh diesel environments
• Helps reduce the risk of engine overheating and potential internal damage
• Compatible with 5.9L Cummins engines in 1994–1998 Dodge Ram 2500 and 3500 models
• Backed by Mishimoto’s Lifetime Warranty for guaranteed quality and reliability

Construction & Design

The Mishimoto Low-Temperature Thermostat is crafted from premium materials engineered for the rigorous demands of heavy-duty diesel engines. Its robust valve mechanism ensures consistent and precise activation at the specified lower temperature, promoting improved coolant circulation and thermal management. The corrosion-resistant housing enhances longevity and reliable operation, even under extreme temperature fluctuations and harsh operating conditions.

Installation & Fitment

This thermostat is designed as a direct-fit replacement for the factory thermostat in 1994–1998 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L Cummins engine. Installation is straightforward and requires no modifications to the existing cooling system. Simply remove the original thermostat and install the Mishimoto unit to immediately benefit from improved cooling efficiency and better engine temperature control.

What's Included

• Mishimoto Low-Temperature Thermostat (174°F activation)
• Gasket or O-ring seal for proper installation
• Installation instructions

Ideal For

This thermostat is perfect for Dodge Ram 2500 and 3500 owners who demand reliable engine cooling under challenging conditions. Whether you tow heavy trailers, operate in hot climates, or want to enhance your truck’s thermal management, the Mishimoto Low-Temperature Thermostat provides a durable and effective solution to protect your 5.9L Cummins engine from overheating and maintain optimal performance.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.