Fail Safe Series Thermostat Fits 1955-1957 Metropolitan Series B


Will fit the following model(s):
1955 Metropolitan Series B
1956 Metropolitan Series B
1957 Metropolitan Series B



  • Inventive, patented design
  • High quality Stainless Steel and Copper construction
  • Engine locking technology saves money by preventing costly engine damage.
  • Tested and calibrated to perfection
  • Made with high-quality materials from an OE supplier.

MotoRad® Fail SafeTM Series Thermostat (D3E9EE). The temperature is 195 degrees Fahrenheit. Fail-Safe Thermostats provide premium, patented technology for superior protection over any other thermostat on the market. Only When a cooling system component fails, Fail-Safe is designed to lock in the open position. This allows for maximum coolant flow, avoiding costly engine damage. Fail-Safe is intended to help protect your engine from overheating. When overheating occurs, Fail-Safe automatically locks in the open position to allow maximum coolant flow. When standard thermostats fail, they lock in the closed position and prevent coolant flow to the engine, which can cause serious damage to your engine. Fail-Safe has a patented safeguard against overheating damage. Fail-Safe thermostats are built with a one-of-a-kind extra stroke that allows operation in two stages: Stage 1: At normal operating temperatures, the Fail-Safe operates similarly to any other thermostat. Stage 2: When overheating is caused by a deteriorating cooling system part, the Fail-Safe has a secondary stroke that activates a precision engineered piston that automatically locks the valve into a wide open position, allowing coolant to circulate freely. Don't get stranded on the side of the road because your engine overheated and your conventional thermostat failed in the closed position, preventing coolant from flowing to the engine. Buy the best Thermostat on the market, the Motorad Fail-Safe Thermostat. Why is the Fail-Safe the best thermostat? Under normal operating conditions, the Fail-Safe functions similarly to a traditional thermostat. When your vehicle overheats due to a deteriorating cooling system part, a standard thermostat locks in the closed position, preventing coolant from flowing to the engine. Motorad's patented Fail-Safe Thermostat is the only thermostat that automatically locks in the open position, allowing coolant to circulate freely throughout the engine during the overheating process. This can keep your engine from needing a more expensive repair. You must replace the Fail-Safe thermostat once it has done its job of allowing coolant to continue to flow to the engine during an overheating condition by locking in the open position. There are standard thermostats and then there is the Motorad Fail-Safe Thermostat. When you need a new thermostat, request MotoRad's Fail-Safe Thermostat.



**Please note some of our listings use stock photos which may be slightly different than the actual product.

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Will fit the following models:
1955 Metropolitan Series B
1956 Metropolitan Series B
1957 Metropolitan Series B





MotoRad® Fail SafeTM Series Thermostat (D3E9EE). The temperature is 195 degrees Fahrenheit. Fail-Safe Thermostats provide premium, patented technology for superior protection over any other thermostat on the market. Only When a cooling system component fails, Fail-Safe is designed to lock in the open position. This allows for maximum coolant flow, avoiding costly engine damage. Fail-Safe is intended to help protect your engine from overheating. When overheating occurs, Fail-Safe automatically locks in the open position to allow maximum coolant flow. When standard thermostats fail, they lock in the closed position and prevent coolant flow to the engine, which can cause serious damage to your engine. Fail-Safe has a patented safeguard against overheating damage. Fail-Safe thermostats are built with a one-of-a-kind extra stroke that allows operation in two stages: Stage 1: At normal operating temperatures, the Fail-Safe operates similarly to any other thermostat. Stage 2: When overheating is caused by a deteriorating cooling system part, the Fail-Safe has a secondary stroke that activates a precision engineered piston that automatically locks the valve into a wide open position, allowing coolant to circulate freely. Don't get stranded on the side of the road because your engine overheated and your conventional thermostat failed in the closed position, preventing coolant from flowing to the engine. Buy the best Thermostat on the market, the Motorad Fail-Safe Thermostat. Why is the Fail-Safe the best thermostat? Under normal operating conditions, the Fail-Safe functions similarly to a traditional thermostat. When your vehicle overheats due to a deteriorating cooling system part, a standard thermostat locks in the closed position, preventing coolant from flowing to the engine. Motorad's patented Fail-Safe Thermostat is the only thermostat that automatically locks in the open position, allowing coolant to circulate freely throughout the engine during the overheating process. This can keep your engine from needing a more expensive repair. You must replace the Fail-Safe thermostat once it has done its job of allowing coolant to continue to flow to the engine during an overheating condition by locking in the open position. There are standard thermostats and then there is the Motorad Fail-Safe Thermostat. When you need a new thermostat, request MotoRad's Fail-Safe Thermostat.

**Please note some of our listings use stock photos which may be slightly different than the actual product.