"bert" wrote in message
...
And if you've ever ridden in VWs (bug or camper van), you know
what combustion heating smells like. I rode in a car once, I was
sure we were going to be asphyxiated :-/ There was that much leakage.

Sound like it was faulty. But older air cooled VW got their heat from the
exhaust.

How common is coolant heating versus exhaust heating in water-cooled cars?
Do all water-cooled cars use the coolant to heat the car heater, or are
there any which use the exhaust as the heat exchanger, as for air-cooled
cars?