replacement 12v heater blower motor

[blueskies]

Here's an update on my heater blower motor.

I bought this motor on ebay, listed as a Dodge '86-'97 Van heater motor. It looked about the same size, and it was only 12 bucks. I took a chance, and bought it.

The sticker on the side of the motor reads: Unimotor 14560 12v 01134. Made in Canada. The motor will run in either direction, depending on which wire you put to ground.

I pulled apart the front of my '50 to get at the heater blower, which is right behind the grill. The blower is a squirrel cage fan, and the housing connects to the heater core box under the hood.

I wrangled the motor out, and checked it with the new one for comparison. It looked like it was going to work just fine.

The old motor has a three bolt shoe on it, and the new one has two bolts sticking out of it, so I just drilled two new holes in the housing plate, and mounted it up. I put a foam plumbing washer in between the motor and plate to space the motor away from the plate similar to the original.

Turns out that the shaft of the motor is an exact match for the old one, so the fan cage fit perfectly.

The housing and motor are held in place on the radiator support, by a clamp. Even the clamp fit just right on the new motor. The new motor has a hole in the side, so I stuck a piece of dynamat over it, to keep the weather out.

All stuffed back behind the grill, it works far better than the old 6v motor did, and has two speeds on the dash switch.

After I got it all buttoned up, I had another look at the old motor. Turns out, the three bolt shoe on the motor mounts to the motor with the same two bolts that the new motor has. If I had been paying attention, it would have been a direct swap, no drilling required... DOH! I could have just put the three bolt shoe on the new motor and been done with it.

Now that I know this motor is such a great fit, I'm going to try and find another one for the defroster motor.

I'm amazed at how well this heater works, it's very comfy in the car on a 20 degree day like today. And, since the blower is behind the grill, the system is nearly silent. All that can be heard is a bit of air blowing out of the under dash duct.

Pete

[Quagmire1947]

Looks like one I put in 47 WC truck heater except mine was 6 volt, cost me about 60 bucks at our local Carquest store.....

[48mirage]

This info needs to be put either in the parts folder or the Tech folder for future reference.

[Don Coatney]

Looks good Pete;

I wonder if that is the same motor as is in my P-15? I also need to replace my heater motor with a 12 volt unit.

[blueskies]

Looks good Pete;

I wonder if that is the same motor as is in my P-15? I also need to replace my heater motor with a 12 volt unit.

Don-

Where is the blower motor on a P15? Under the dash? Does your heater have a squirrel cage fan, or a propellor blade fan?

I didn't take any measurements while I was at it, but I can measure the shaft on the old motor and it's case diameter for you for comparison. The shaft on the new motor was exactly the same as the old one. The case was slightly smaller in diameter. You can see in the pic above where the two are side by side, that the old motor has a "bump" in the case, where it gets larger in diameter. The new motor is about the same diameter as the smaller part of the old motor.

Pete

[Heavy Flat Head]

Thanks Pete for coming up with something that is easy.

You have been kind of scaring me with your war stories lately.

Ed.

[BobT-47P15]

Here's a pic of this style heater.....i forget the model number. They do

have a squirrel cage fan. Attach with 3 bolts thru the retaining ring.

Under dash on passenger side.

[Young Ed]

I believe Don has this style heater. Similar motor with an actual fan attached. The fan still attached with a set screw I believe.

[blueskies]

Here's a pic of this style heater.....i forget the model number. They do

have a squirrel cage fan. Attach with 3 bolts thru the retaining ring.

Under dash on passenger side.

The motor in this diagram looks just like the one that came out of my heater, with the three bolt flange on the base of the motor.

I believe Don has this style heater. Similar motor with an actual fan attached. The fan still attached with a set screw I believe.

I would guess that the motor for the other type is the same, but don't know for sure.

Pete

[blueskies]

Thanks Pete for coming up with something that is easy.

You have been kind of scaring me with your war stories lately.

Ed.

I guess all the easy stuff is done on my car... just down to the head scratchers now...

Pete

[Young Ed]

Pete I believe that my heater like that has a 2 bolt piece like your replacement one. The only issue would be height. Don I believe I still have one of these heaters apart at home I could measure.

[Merle Coggins]

The new motor has a hole in the side, so I stuck a piece of dynamat over it, to keep the weather out.

I believe that hole in the motor is to allow it to breath for cooling. If it's blocked it may overheat.

[blueskies]

I believe that hole in the motor is to allow it to breath for cooling. If it's blocked it may overheat.

Could be, but the end of the motor that faces the fan has holes in it too for air circulation.

The big hole that I covered is about the size of a quarter. Since original application for the new motor was inside a van, and the '50 mount loctation is right behind the grill and exposed to the driving rain, etc, I decided it was better to seal it up a bit.

Pete

[Don Coatney]

Pete I believe that my heater like that has a 2 bolt piece like your replacement one. The only issue would be height. Don I believe I still have one of these heaters apart at home I could measure.

I believe Don has this style heater. Similar motor with an actual fan attached. The fan still attached with a set screw I believe.

Ed;

You are on the money. Measure away and let me know. I have never disassembled my heater but your pictures are correct for my heater.

[later]

That hole in the motor is a condensation drain. I was lucky enough to get a Dodge van without the drain. The motor died in the middle of winter because the moisture in the heater box from the outside air intake would collect in the motor after it was shut down. I was able to get a warranty replacement. It may not be a problem inside the cabin, or if you only drive in warm weather.

[blueskies]

Just surfed through the Napa Online website, and found what looks to be the same motor that I bought on ebay.

Says retail $41.00. Also, it lists all the spec's for the motor, if you want to measure for your application.

Pete

[Andydodge]

What's a heater?...............andyd in Sunny South Grafton........lol.......actually tho' the preceeding how-to & explanation are the sort of thing that makes this site one of the best I've found, I don't need the heater info(don't have one in the Plymouth and have rarely used the one in the Dodge) but I've learnt something.........thanks, andyd

[blueskies]

What's a heater?...............andyd in Sunny South Grafton........lol.......actually tho' the preceeding how-to & explanation are the sort of thing that makes this site one of the best I've found, I don't need the heater info(don't have one in the Plymouth and have rarely used the one in the Dodge) but I've learnt something.........thanks, andyd

I wish I didn't need the heater...

Round here, there is winter and July. And, sometimes, it snows in July... Having a good heater extends the driving season by several months.

Pete

[Young Ed]

As promised for Don I measured the motor in my spare heater. Sorry it took a bit Don-turns out this heater was still in one piece! And of course the motor is like the last piece to come out. Plan to remove the unit from the car to swap motors. Anyway the motor is 4.75in long the fan shaft is 1in of that. And the 2 mounting studs are 2 3/8s apart.

[Don Coatney]

Thanks Ed;

Replacement of this motor is on my to-do list.

[blueskies]

As promised for Don I measured the motor in my spare heater. Sorry it took a bit Don-turns out this heater was still in one piece! And of course the motor is like the last piece to come out. Plan to remove the unit from the car to swap motors. Anyway the motor is 4.75in long the fan shaft is 1in of that. And the 2 mounting studs are 2 3/8s apart.

Ed-

Your motor looks a bit shorter than mine... I looked at the spec's again for the new motor in the NAPA link above, and it is 4 1/16" long overall, but the mounting face to mounting face is 3 5/16". Looks like it will work to me... The extra length in the overall dimension is a bump in the case between the mounting face and the base of the shaft.

Pete

[Young Ed]

It looks like it will work to me too. Of course only really way to know is buy one and try it which is a little more involved in Dons car. The motor is the second to the last piece to come apart. Once removed from the car its a pretty easy job though.

[falconvan]

Bob,

Your dash is the color my wife and I are looking to paint the coupe when it's done. Very sharp! You wouldn't have a picture of the full dash and a code for the paint, would you?

[amdthunderbird]

Just an update. The 12v Unimotor part number may have changed. I found the Four Seasons motor has a 35591 part number. It's a direct bolt in replacement with one exception. The original motor uses 8-32 mounting bolts & the new motor has 10-32 studs. It's a simple matter of opening the holes in the mounting plate/flange. The Orange wire would be Negative for correct rotation.

[Sniper]

http://www.yourolddad.com/blower-motor