The product images shown are Illustrative only and may not be an exact representation of the product.

Heavy Duty Thermostats

Gates only partners with prime OE thermostat manufacturers to provide OE Exact or OE Type construction for use on heavy-duty trucks, buses and tractors.

  • OE-exact designed for customers that demand the exact OEM thermostat as a replacement product.
  • Fits applications with 3/4" deep filler necks. Custom heavy-duty radiator caps available upon request.
  • OE Type - Quality controlled factory calibration assures accuracy of opening and closing, regardless of pressure changes.
  • Matches the OEM product fit, function and design.
  • Temperature sensitive heat motor provides consistent valve response for smooth performance and precise engine cooling.
  • Features including jiggle pins and check valves for air venting, seals, and gaskets make these thermostats equivalent to the original equipment parts.

All Parts

1-10 of 48 Items
Part # Product # Description Type Jiggle Pin Temperature Flange Diameter Height From Flange Depth From Flange Design
33118 74125613 33118 THERMOSTAT Heavy-Duty Thermostat false 180 Fahrenheit 2.46 in 1.59 in 1.51 in Top By-Pass
33166 74120181 33166 HEAVY DUTY THERMOSTATS Heavy-Duty Thermostat false 160 Fahrenheit 2.46 in 1.4 in 1.59 in Top By-Pass
33167 74125817 33167 THERMOSTAT Heavy-Duty Thermostat false 170 Fahrenheit 2.45 in 1.57 in 1.4 in Top By-Pass
33168 74125818 33168 THERMOSTAT Heavy-Duty Thermostat false 180 Fahrenheit 2.46 in 1.58 in 1.4 in Top By-Pass
33179 74125614 33179 THERMOSTAT Heavy-Duty Thermostat false 190 Fahrenheit 2.46 in 1.57 in 1.52 in Top By-Pass
33347 74125747 33347 THERMOSTAT Heavy-Duty Thermostat false 170 Fahrenheit 3.52 in 1.42 in 1.42 in Side By-Pass
33348 74125748 33348 THERMOSTAT Heavy-Duty Thermostat false 180 Fahrenheit 3.53 in 1.35 in 1.52 in Side By-Pass
33357 74125757 33357 THERMOSTAT Heavy-Duty Thermostat false 170 Fahrenheit 2.87 in 1.73 in 2.7 in Top By-Pass
33367 74120189 33367 HEAVY DUTY THERMOSTATS Heavy-Duty Thermostat false 170 Fahrenheit 2.87 in 0.2 in 2.7 in Choke
33386 74125786 33386 THERMOSTAT Heavy-Duty Thermostat false 160 Fahrenheit 2.85 in 0.25 in 2.62 in Choke
1-10 of 48 Items

We've got your cooling system under control.

Gates heavy duty thermostats are designed to speed engine warm-up and regulates the engine’s operating temperature, resulting in better fuel economy, lower emissions, exceptional engine performance and longer engine life.

Gates brings OE to the Aftermarket.

Gates engineers our aftermarket parts in partnership with the top vehicle OEMs around the world, so you can trust premium-grade parts with exceptional fit, function, and performance in your heavy duty applications.