Heater blower motor, Are motors & housings interchangeable? Options

[zonedoubt]

The heater blower motor in my '74 is toast. I bench tested the motor w/ 12VDC and confirmed that the supply circuit is working OK. It's probably the original motor and finally kicked the bucket from constant heat exposure in the engine bay.

The type of motor that is in there is the single output tube with a Y-adapter. Two hoses come off the Y and go to the two J-tubes on either side of the engine bay. I know that on most 74's, the motor has one output and that the passenger side J-tube is usually capped. This car was probably set up to output more heat to deal with the cold Canadian climate.

My question is whether the motor from the earlier 2-output fan blowers can be easily removed and fitted to the housing on the later style blowers? Alternatively, are there any other motors (Porsche or VW) that will fit?

Or...does anyone have a good condition working motor they want to sell? It could be the single output type since I could simply swap the motor the Y-adapter.

[Root_Werks]

Some motors will interchange with some housings. The show stopper will be plastic or metal housings. Motors from plastic housings mount just a little different than the ones from the metal housings. Nope, you can't just swap the fans around and drill holes to make it work either. The fans on both types mount differently. So if you can find a good used fan with the same type housing (plastic or metal, 911 or 914 or VW doesn't matter), then you can swap out the motor. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Done it tons of times.

Oh yeah, if you can find the motors that are bigger, usually the 911 motors, grab those. Better motor.