More Information for MOTORAD 457205
{Alternate Inventory Numbers: 457-205, 55705}
Continue Shopping
MOTORAD 457205  
MOTORAD 457205close
Part image
MOTORAD 457205 Specifications
Flange Thickness0.05 in
Gasket or Seal IncludedYes
Gasket/Seal MaterialRubber
Gasket/Seal MaterialRubber
Height1.43 IN
Height Between Flanges1.00 in
Installation Tool IncludedNo
Jiggle Pin Weep HoleNo
Number of Seals1
Seal TypeO-Ring
Sealing Flange Outside Diameter2.05 IN
Start to Open Temperature203 F
Temperature203 Deg. F
Temperature (Degree)203
203 Degree; Standard; Includes Thermostat and Seal

MotoRad offers a full line of thermostats to replace original equipment thermostats. These parts are manufactured with high-grade dual bridge stainless steel construction and they meet or exceed all original equipment manufactures requirements. MotoRad also offers standard thermostats in many alternate temperatures.

Which Thermostat Is Right For You?

Type Lifespan Flow Rate Precise Temperature Control Fail-Safe Engine Protection
Standard Replacement
★★ ★★
★★ ★★ ★★
Heavy Duty ★★★ ★★ ★★★
★★ ★★
What Temperature Thermostat Do I Need?

Thermostats have a “rated” temperature (such as 180F or 195F). This is the temperature the thermostat will start to open, releasing heated coolant from the engine into the radiator. The thermostat will fully open once the coolant gets another ten or fifteen degrees warmer.


These thermostats match the OEM-specified temperature rating for the vehicle. Manufacturers recommend an OE temperature thermostat for most engines, especially for:

  • Modern engines with computers that use the coolant temperature to help control the fuel, emissions and other important systems


These thermostats have a temperature rating below (cooler than) the OEM-specified temperature rating for the vehicle. This option may make sense for use in:

  • Modified Engines
  • Performance Applications
  • Older / Classic Vehicles
Cooling System Maintenance | Tips & Tools

Without regular maintenance, cooling system components will degrade and fail prematurely, which can lead to costly engine damage. Protect your engine with simple preventative maintenance:

  • Completely drain and flush the system using Cooling System Flush prior to installation. Flushing the system is critical to prevent system contamination and failure.
  • Consider replacing the Radiator Hoses (and Hose Clamps) and Radiator Cap as part of routine preventative maintenance. System contamination can cause these parts to degrade and fail over time, which can lead to severe engine damage from overheating.
  • Refill radiator with fresh Coolant / Antifreeze according to the volume and formula specified in your Owner's Manual. Inspect levels and condition every year.

Cooling System Overview

Installing an Automotive Thermostat

Attention California Customers - WARNING: Cancer and Reproductive Harm -

OEM / Interchange Numbers: 19161962, 212303RC1A, 212306N200, 212306N20A, 21230EL00B

MOTORAD Warranty Information:
12 Months