Originally Posted by WiredForStereo
Discovered today my rear heater pump is disconnected, just sitting there with the hoses cut.
However, on my way home from buying it, the heater worked quite well. Got real toasty warm real quick when I turned it on.
Are these pumps necessary? Do I want to fix/put it into service again?
I do want to retain the stock heaters for heating while driving, though I'll probably set them up with thermostatic fans and probably replace the radiators with something that fits the application better. Maybe add some radiant floor heating, because why not.
Apparently it is not necessary! Mine does not have one. Perhaps it would take stress of the motor's water pump?
If you are doing floor heat, think about a Webasco. Not that I know anything about them, except they can preheat your engine's coolant when it is freezing outside, and/or keep your interior warm (with radiant floor heating) when parked.