
Mishimoto
Mishimoto MMTS-RAM-89H High Temperature Coolant Thermostat
Part # MIMMTS-RAM-89H$97.98
Ground shipping included in priceAvailable to the contiguous U.S. excluding California
Fitment not selectedAdd your truck to verify compatibility
Open Garage →Fast fulfillmentLive inventory and order status
Secure checkoutProtected by Shopify
Diesel supportReal help for the right part
Product details
Description
The 12-valve first-gen engine 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 this truck its stellar reputation. Mishimoto has developed a high-temperature thermostat for the 1989-1993 5.9L 12v trucks. 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.
Features
- Drop-In Replacement
- Faster Warm Up Times
- Ideal For Colder Climates
Specifications
Engine Codes: 6BT
Chassis Codes: D/W Series
Mishimoto Activation Temperature: 189.5° F
OEM Activation Temperature: 180° F
Includes
(1) Mishimoto Thermostat
(1) Thermostat Gasket
Manufacturer Warranty*
Limited Lifetime
Limited Lifetime
Complete the job
Build the job. Not just the cart.
Start with the right part, then choose the supporting pieces that help prevent a second teardown or a last-minute parts run.
Choose your supporting parts
Build an install-ready package.
✓

Primary part · includedMishimoto MMTS-RAM-89H High Temperature Coolant ThermostatMishimoto
$97.98No supporting parts have been verified yet.You can still add the primary part above. We won’t guess at compatibility.
