Rear Heater Blower Motor, Do I have an odd blower? Options

[LotusJoe]

I'm installing the rear blower motor. Mine only as one outlet. I'm assuming this is because it had air conditioning.



The parts book only list one blower motor, but it has two outlets, although the parts number on my blower matches the one in the parts book. (IMG:style_emoticons/default/confused24.gif)

914 rubber shows a blower with two outlets as well, but different from the parts book??

[McMark]

There were three stock setups for the auxiliary heater fan. The early version (70-72 IIRC) was mounted on the engine itself and the early cars do not have a mount on the chassis.

In 73 they started mounting the fans on the chassis and used a single outlet fan in 73-74 because they figured that the air coming out of the engine fan that gets directed through the heat exchanger was sufficient for passenger comfort. The fan in those years was intended to boost the defrosting of the windshield for the driver. In these cars there is a factory supplied plastic cap that covers the passenger side aux. fan pipe.

In 75-76 they added a 'splitter nozzle' to the same 73-74 fan and boosted both heat exchangers. Note that it's the same fan, so the 73-74 cars were blowing all that air out one side, and the 75-76 cars split that air in half.

Also, worth clarifying for some silent readers, that the aux fan mentioned/pictured is only for boosting the air through the heat exchangers. All cars have a fair amount of air coming from the engine fan at all times, which will supply heat through a completely stock system. Also, if you don't have a fan connected to one or either of the aux fan pipes, you should plug them. Otherwise you'll lose some of the air pressure from the engine fan.