Converting burb rear ac housing

[87dieselburb]

Ok well here's the deal I have a 89 burb im using primarily as a plow truck it doesn't have rear defrost and it becomes a bitch plowing and not being able to see out the back and there is no guts in the rear ac housing so I was woundering if it's posible to splice into the heater hoses and plumb it to the rear and put a blower in that housing so it puts hot air directly on the back windows someone please tell me if this is at all possible or if I'm just dreaming of the impossible

 

[PrairieDrifter]

It could be possible with some type of heater grid or something, but I don't think you'll be able to get coolant to flow all the way to the back and to the front again, at least not very easily of course.

 

[yevgenievich]

It can be set up similar to factory. Replace ac hoses with coolant. Put heater core inside housing with a fan blowing towards the back doors.
Factory heater was on the floor, this would just move everything to the top

 

[bucket]

This was brought up before, the issue is coolant level being higher than the radiator cap. Even newer vehicles with heater outlets up high in the rear, it's just ductwork with the heater core mounted down low near the floor.

 

[Georgeb]

Why not something like this mounted so it blows on the back windows. Less trouble than messing around with coolant....

 

[87dieselburb]

That's a good idea were did you find that

 

[Georgeb]

That's a good idea were did you find that

I just searched for 12 volt window defroster....

 

[yevgenievich]

Electric does sound like a way to go. I did not think about the radiator cap, but it is possible to mount heater core on the floor part of AC cover and use blower fan

 

[87dieselburb]

doesn't it use height pressure to move coolant thought the lines and heater core?

 

[87dieselburb]

Doesnt it use height pressure to move coolant thought the lines and heater core?

 

[yevgenievich]

I was thinking of factory heater set up at the floor level blowing through the AC cover ducting to the top. But electric would be easier and faster to set up regardless. Plus, the AC blower wires and control switch can be used to turn it on.

 

[Georgeb]

I was thinking of factory heater set up at the floor level blowing through the AC cover ducting to the top. But electric would be easier and faster to set up regardless. Plus, the AC blower wires and control switch can be used to turn it on.

Provided they will handle the amperage. That 250 watt heater will pull over 20 amps at 12 VDC.

 

[GTME94]

Relay, but then you still have to run another set of power lines back there.

 

[Georgeb]

Relay, but then you still have to run another set of power lines back there.

And that is still easier than coolant hoses.

 

[yevgenievich]

The factory blower wire is right around 12awg.