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A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 5. 9L cooling system with a Mishimoto Dodge 5. 9L Cummins High-Temperature Thermostat! This thermostat is designed as a direct-fit replacement for your aged factory unit. The Mishimoto thermostat has a higher activation temperature (190°F) compared to the factory thermostat (180°F). The higher activation temperature restricts coolant flow longer to allow a quicker engine warm-up, making this thermostat ideal for use in cold climates. As with all our products, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.
Features:
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California Residents: Prop 65 WARNING |
| Year range | Make | Model | Sub Model | Engine Type | Liter | Body | Fuel | Aspiration | Drivetrain |
| 1994-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | Cab & Chassis | DIESEL | Turbocharged | RWD |
| 1994-1998 | Dodge | Ram 3500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | RWD | |
| 1994-1998 | Dodge | Ram 3500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | 4WD | |
| 1994-1998 | Dodge | Ram 3500 | Base | V8 | 5.9L | Cab & Chassis | GAS | Naturally Aspirated | RWD |
| 1994-1998 | Dodge | Ram 3500 | Base | V8 | 5.9L | Cab & Chassis | GAS | Naturally Aspirated | 4WD |
| 1994-1998 | Dodge | Ram 3500 | Base | L6 | 5.9L | DIESEL | Turbocharged | RWD | |
| 1994-1998 | Dodge | Ram 3500 | Base | L6 | 5.9L | DIESEL | Turbocharged | 4WD | |
| 1994-1998 | Dodge | Ram 3500 | Base | L6 | 5.9L | Cab & Chassis | DIESEL | Turbocharged | RWD |
| 1994-1998 | Dodge | Ram 3500 | Base | L6 | 5.9L | Cab & Chassis | DIESEL | Turbocharged | 4WD |
| 1994-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | RWD | |
| 1994-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | 4WD | |
| 1994-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | Cab & Chassis | GAS | Naturally Aspirated | RWD |
| 1994-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | Cab & Chassis | DIESEL | Turbocharged | 4WD |
| 1994-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | Cab & Chassis | GAS | Naturally Aspirated | 4WD |
| 1994-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | DIESEL | Turbocharged | RWD | |
| 1994-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | DIESEL | Turbocharged | 4WD | |
| 1995-1997 | Dodge | Ram 3500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | RWD | |
| 1995-1997 | Dodge | Ram 3500 | Base | L6 | 5.9L | DIESEL | Turbocharged | 4WD | |
| 1995-1997 | Dodge | Ram 3500 | Base | L6 | 5.9L | DIESEL | Turbocharged | RWD | |
| 1995-1997 | Dodge | Ram 3500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | 4WD | |
| 1995-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | 4WD | |
| 1995-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | RWD | |
| 1995-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | DIESEL | Turbocharged | RWD | |
| 1995-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | DIESEL | Turbocharged | 4WD | |
| 1998-1998 | Dodge | Ram 3500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | RWD | |
| 1998-1998 | Dodge | Ram 3500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | 4WD | |
| 1998-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | DIESEL | Turbocharged | 4WD | |
| 1998-1998 | Dodge | Ram 3500 | Base | L6 | 5.9L | DIESEL | Turbocharged | RWD | |
| 1998-1998 | Dodge | Ram 3500 | Base | L6 | 5.9L | DIESEL | Turbocharged | 4WD | |
| 1998-1998 | Dodge | Ram 2500 | Base | L6 | 5.9L | DIESEL | Turbocharged | RWD | |
| 1998-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | RWD | |
| 1998-1998 | Dodge | Ram 2500 | Base | V8 | 5.9L | GAS | Naturally Aspirated | 4WD |
| Off-Road: | No |
| Mishimoto Activation Temp (Celsius): | 87.5°C |
| Mishimoto Activation Temp (Fahrenheit): | 190°F |
| OEM Activation Temp C: | 82°C |
| OEM Activation Temp F: | 180°F |
| Rows: | 2 |