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 low-temperature thermostat for the 1989-1993 5.9L 12v Cummins. This Mishimoto thermostat activates at a lower temperature (174.2 degreesF) compared to the factory thermostat (180 degreesF). By lowering the activation temperature, coolant flows through the radiator earlier, maintaining lower fluid temperatures. The Mishimoto low-temperature thermostat is ideal for vehicles in warmer climates, or for use in vehicles experiencing extreme driving/towing conditions. This thermostat includes a high-quality replacement gasket and our signature Mishimoto Lifetime Warranty.
Specifications:
| Description_DEF |
Engine Coolant Thermostat |
| Description_DES |
Low-Temperature Thermostat, fits Dodge 5.9L First-Gen Cummins 1989-1993 |
| Description_EXT |
Low-Temperature Thermostat, fits Dodge 5.9L First-Gen Cummins 1989-1993 |
| Description_MKT |
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 low-temperature thermostat for the 1989-1993 5.9L 12v Cummins. This Mishimoto thermostat activates at a lower temperature (174.2 degreesF) compared to the factory thermostat (180 degreesF). By lowering the activation temperature, coolant flows through the radiator earlier, maintaining lower fluid temperatures. The Mishimoto low-temperature thermostat is ideal for vehicles in warmer climates, or for use in vehicles experiencing extreme driving/towing conditions. This thermostat includes a high-quality replacement gasket and our signature Mishimoto Lifetime Warranty. |
| Description_INV |
Mishimoto MMTS-RAM-89L |
| Description_SHO |
Thermostat |
| TechSpec OEM Activation Temperature (F) |
180 |
| SellingPoint06 |
N/A |
| 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 |
| Install Difficulty |
2 |
| SellingPoint03 |
Ideal for vehicles in warm climates or under extreme driving/towing conditions |
| SellingPoint04 |
Includes thermostat and high-quality replacement gasket |
| SellingPoint05 |
Mishimoto Lifetime Warranty |
| TechSpec Chassis Codes |
D/W Series |
| TechSpec Engine Codes |
6BT |
| TechSpec Includes |
(1) Mishimoto Thermostat--(1) Thermostat Gasket--Mishimoto Lifetime Warranty |
| SellingPoint01 |
Direct fit for 1989-1993 Dodge Ram with 5.9L Cummins |
| SellingPoint11 |
N/A |
| SellingPoint13 |
N/A |
| SellingPoint14 |
N/A |
| TechSpec Note |
N/A |
| SellingPoint02 |
Lower activation temperature allows coolant to flow through the system earlier, maintaining lower coolant temperatures |
| SellingPoint07 |
N/A |
| SellingPoint08 |
N/A |
| SellingPoint09 |
N/A |
| SellingPoint10 |
N/A |
| SellingPoint12 |
N/A |
| SellingPoint15 |
N/A |
| TechSpec Mishimoto Activation Temperature (F) |
174.2 |
| Length |
2.5000 |
| Width |
2.5000 |
| Height |
2.5000 |
| Weight |
1.0000 |
