Quote:
Originally Posted by Arragonis
Would the heat circulate if the engine is off ? I was pondering your sump heater for my passat.
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Yes it should, remember the radiator is blocked off by the thermostat, and I thought the heater core on the Civic was nearly as big as the radiator anyway. It should cycle like convection up the heater core through the water pump and engine back to the bottom of the heater core. However since we don't know the dimensions of the heater its hard to guess as to whether it will mount at the lower heater core connection.