Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C
Mishimoto 5.9L Cummins Thermostat for 1989–1993 Dodge D250/D350/W250/W350 – High-Temperature 87.5C

Mishimoto 87.5°C High-Temperature Thermostat - Dodge 5.9L 12v Cummins 1989-1993

Mishimoto SKU: MISMMTS-RAM-89H
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Mishimoto high-temperature thermostat for the 1989-1993 first-gen Dodge D250 / D350 / W250 / W350 5.9L 12-valve Cummins diesel. Its higher 189.5°F activation (vs. the 180°F factory unit) restricts coolant circulation longer for a quicker engine warm-up — ideal for cold climates where rapid warm-up and cabin heat matter. Includes a replacement gasket, backed by the Mishimoto Lifetime Warranty.

Specifications

Type High-temperature thermostat
Activation Temp 87.5°C / 189.5°F (vs. 180°F stock)
Engine 5.9L 12-valve Cummins diesel
Includes Replacement gasket
Application 1989-1993 Dodge D/W250-350 5.9L Cummins

This part fits:

Year Make Model Submodel
1989-1993 Dodge D250 Base
1989-1993 Dodge D350 Base
1989-1993 Dodge W250 Base
1989-1993 Dodge W350 Base
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