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Yes, the main cooling fan is the one and only fan until somewhere in the 70s when a dash fan was added (I believe.) The hot air is pushed through a pair of heat exchangers that are essentially casings around exhaust pipes. Any leaks in and around these will send fumes into your car. Andre > So it's the main cooling fan that pushes the air > forward? Does this hot air travel past oily engine > bits to get to the cabin? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~