Mishimoto - MMTS-RAM-89H
High-Temperature Thermostat, fits Dodge 5.9L First-Gen Cummins 1989-1993
The 12-valve first-gen Cummins in your Ram is considered one of the best diesel engines ever produced, and for good reason. Fuel efficiency, torque, and simplicity are just a few characteristics that give the Cummins its stellar reputation. We're huge fans of the Cummins engine, which is why we’ve developed a high-temperature thermostat for the 1989-1993 5.9L 12v Cummins. This Mishimoto thermostat activates at a higher temperature (189.5°F) compared to the factory thermostat (180°F). By raising the activation temperature, coolant flows through the system later, promoting quicker engine warmup. The Mishimoto high-temperature thermostat is ideal for vehicles in cold climates, where rapid warmup and quicker in-cabin heat is vital. This thermostat includes a high-quality replacement gasket and our signature Mishimoto Lifetime Warranty.
- Direct fit for 1989-1993 Dodge Ram with 5.9L Cummins
- Higher activation temperature restricts coolant circulation for a longer time, providing quicker engine warmup
- Ideal for cold climates
- Includes thermostat and high-quality replacement gasket
- Mishimoto Lifetime Warranty
TechSpec Applications: Dodge D250 I6 (5.9L) 1989-1993--Dodge D350 I6 (5.9L) 1989-1993--Dodge W250 I6 (5.9L) 1989-1993--Dodge W350 I6 (5.9L) 1989-1993
TechSpec Engine Codes: 6BT
TechSpec Chassis Codes: D/W Series
TechSpec Includes: (1) Mishimoto Thermostat--(1) Thermostat Gasket--Mishimoto Lifetime Warranty
TechSpec Note: N/A
TechSpec Mishimoto Activation Temperature (F): 189.5
TechSpec OEM Activation Temperature (F): 180
SellingPoint01: Direct fit for 1989-1993 Dodge Ram with 5.9L Cummins
SellingPoint02: Higher activation temperature restricts coolant circulation for a longer time, providing quicker engine warmup
SellingPoint03: Ideal for cold climates
SellingPoint04: Includes thermostat and high-quality replacement gasket
SellingPoint05: Mishimoto Lifetime Warranty
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Install Difficulty: 2
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