Plumbed into the fuel upstream from filters, the coolant heater is another compact way to run through the cold. An optional internal
thermostatically-controlled valve allows fuel to bypass the heater once it has reached operating temperature, to insure continuous flow to the engine. Depending on your vehicle's fuel
flow rate, you can get as much as 89°F heat rise.
Like its electric partner, there are no moving parts, nothing to rust or corrode.