I'd like a Kenlowe Hotstart for my Landrover, but they cost about =A3300. Was thinking, and please bear with me, that I could make a much cheaper system that used a domestic kettle element and thermostat in a suitable container, plus a pump to circulate coolant past the heater. If the pump failed for any reason, then the local temperature of the coolant would rise until the thermostat cut the power to the coil.
Not sure of what kind of pump to use - has to be cheap (read "free"!!!) - thought about a washing machine pump or maybe a shower pump.
Whole system will run off mains voltage (220-240V) just like the Kenlowe system.
Thoughts, please!!