Frost plug heaterFrost plug heaterI have installed a pump plus heater unit in . A frost plug heater is an electric heater that heats the engine of a vehicle to give quicker starts and protects your engine from damage that can occur duringThe clamping mechanism for securing in place an electric heating element insertable through a frost plug aperture into the coolant passage in the blocks of a water cooled . Some people are afraid that the engine thermostat will close . . • Increased Glow ... more