Quick Ship SKU #: MISH-MMTS-RAM-89H Mishimoto High Temperature Thermostat 89-93 Dodge 5.9L Cummins

If you live in the north, or anywhere that gets cold, and you’re tired of waiting a while for your engine to warm up, then Mishimoto’s high temperature thermostat for your 1989-1993 Dodge 1st Gen Cummins can help solve that problem. 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. There are plenty of huge fans of the Cummins engine, which is why Mishimoto 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 the signature Mishimoto Lifetime Warranty.