(1953-55 1st Series) Radiator Cap 4#

OE Type; Cap (Open System) - 4 psi (SAE Range 3-5 psi)

Unlike conventional thermostats that continually open and close to achieve the proper operating temperature and flood the engine with coolant, the Stant SuperStat® thermostat has a unique v-notch, non-linear design that reduces cycling by precisely metering the amount of coolant needed to maintain proper operating temperature.

The v-notch provides a small initial flow. As the engine heats up, the v-notch gradually opens wider, metering coolant into the system until the desired engine temperature is reached. Features:

• High flow venturi for maximum cooling capacity during high temperature.
• High load operation and employs a unique Weir Valve® for precise flow metering during cold weather.
• Light load operation to ensure stable temperature control under all conditions.
• High strength stainless steel flange is burnished to a bright finish for additional stress relief and added corrosion resistance.
• Thicker than most competitor thermostats and our standard reverse poppet thermostat for added strength and longer life.
• Larger piston that delivers 1-1/2 times the power of our standard thermostat and almost 2-1/2 times as much power as the competition for enhanced durability and longer life.
• Opening spring is designed with a load that is 50% stronger than our standard reverse poppet thermostat. This heavy-duty spring helps return the thermostat to the closed position and prevent cold running, even under the most adverse conditions.