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Author Topic: Heater fan upgrade  (Read 1742 times)

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Offline vangremlin

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Heater fan upgrade
« on: March 12, 2012, 10:10:53 PM »
Gronk has mentioned a couple of times of the benefits of swapping to a heater fan motor from a Chevy Blazer.  I came across this "How To" for installing it in a Jeep, it may have some good info if you're planning to do the swap on an Eagle also.  Good luck!

http://www.jeeptech.com/body/heater.html
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1972 Gremlin X 304
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Offline 85AmCfreak

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Re: Heater fan upgrade
« Reply #1 on: March 12, 2012, 10:22:29 PM »
Can this be done in an eagle? Its not really the same thing.
I Don't know why. But everybody's always talking about their STI or That guys EVO, I think I'll stick with my old, but reliable AmC. Did I ever tell you I was Full blooded Eagle?

Offline vangremlin

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Re: Heater fan upgrade
« Reply #2 on: March 12, 2012, 10:48:37 PM »
1981 Kammback 258 - "Pepe"
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390

Offline MortenB

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Re: Heater fan upgrade
« Reply #3 on: January 30, 2013, 09:20:29 AM »
I just got a heater motor for a 1984 K5 Blazer, but it is completely different than the Eagle motor.  The mount is not round, the blower cage is much deeper than the Eagle, the motor sticks a ways into the heater box, so even if I use the original cage, it would stick out much farther than original.

Any ideas?   The jeep page says to use a motor from a 1973 Blazer.  I haven't tried this yet. 

I could use some more exact information.

It costs me $50 in postage to get a heater motor to Norway, so I'd rather not try too many times.

Morten.
1980 Eagle wagon (first 29 years spent in Arizona)
1983 Eagle SX/4, 6cyl 5 speed
1970 Camaro (undergoing restoration)
1966 Ford Country Sedan wagon (30000 miles original)
1964 Lincoln Continental Convertible
1992 Chevrolet Blazer EV conversion; 100% ELECTRIC car, daily driver
1996 VW Golf Citistromer; 100% ELECTRIC car, daily driver

Offline vangremlin

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Re: Heater fan upgrade
« Reply #4 on: January 30, 2013, 11:05:51 PM »
I just got a heater motor for a 1984 K5 Blazer, but it is completely different than the Eagle motor.  The mount is not round, the blower cage is much deeper than the Eagle, the motor sticks a ways into the heater box, so even if I use the original cage, it would stick out much farther than original.

Any ideas?   The jeep page says to use a motor from a 1973 Blazer.  I haven't tried this yet. 

I could use some more exact information.

It costs me $50 in postage to get a heater motor to Norway, so I'd rather not try too many times.

Morten.


I would suggest sending a PM directly to Gronk, he seems to be the most knowledgeable on the swap.  Good luck!
1981 Kammback 258 - "Pepe"
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390

Offline carnuck

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Re: Heater fan upgrade
« Reply #5 on: January 31, 2013, 10:23:22 PM »
Definitely '73 to '82 WITHOUT A/C!
FOR SALE
'87 Comanche 4.0L AW4/NP242 3.73 gears, lifted 5" on near new 33" tires $3500 obo
'82 Eagle Wagon (Brown Betty) 4.2L/727/NP229 and soon 8.25 rear axle and non-vacuum 3.08 front to match. 235/75/15 tires. It's down to minor body work (someone creamed my driver's door but I have another in good shape) almost rust free and interior work (seats are worn and carpet torn). $2000 but about to go up due to more work being done.

Pics of my other for sale stuff http://tinyurl.com/jimsclads

Offline txjeeptx

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Re: Heater fan upgrade
« Reply #6 on: January 31, 2013, 11:37:21 PM »
Just did this swap in my YJ, havent tested it(still finishing engine swap), but the 73-82 Blazer(nonAC) blower motor has much larger magnets and windings than stock Jeep, which is the same size/shape as my '82 SX/4's blower. I had to enlarge the hole on the firewall for the motor with an air-saw, but a small die grinder cutoff disk could to the trick, too. Paint the cuts! If its a good swap/mod, I'll do it on the Eagle when it needs a heater core(hopefully never, banking on never at the rate I'm working on getting it finished up.).
'82 Eagle SX/4 "Golden Eagle", '89 YJ rock-crawler, '79 Jeep Cherokee Golden Eagle "FSJ", 'o7 F150 Supercrew FX/4 daily driver, 'o8 Solara Convertible - and a very happy wife - she left me, total surprise, her loss.

Offline MortenB

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Re: Heater fan upgrade
« Reply #7 on: February 14, 2013, 01:47:57 PM »
Ok, now I've tried it with a motor from a '73 Blazer.  First problem, the new motor rotates the wrong direction.  And, the mount is different.  I could make a spacer/adaptor, but see little point since the motor runs the wrong way.

Has anyone out there actually done this to an Eagle?  Gronk has done them to Jeeps, but they are apparently not the same.
1980 Eagle wagon (first 29 years spent in Arizona)
1983 Eagle SX/4, 6cyl 5 speed
1970 Camaro (undergoing restoration)
1966 Ford Country Sedan wagon (30000 miles original)
1964 Lincoln Continental Convertible
1992 Chevrolet Blazer EV conversion; 100% ELECTRIC car, daily driver
1996 VW Golf Citistromer; 100% ELECTRIC car, daily driver

Offline carguy87

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Re: Heater fan upgrade
« Reply #8 on: February 14, 2013, 07:01:04 PM »
Easy fix, take the leads out of the connector, and reverse them, and whoolah, it will spin the other direction :hello2:

Offline MortenB

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Re: Heater fan upgrade
« Reply #9 on: February 15, 2013, 01:46:39 AM »
It's a single wire blower motor.  The whole case is ground.  If I insulate it with a spacer I could make the wire ground and the whole case positive. 

1980 Eagle wagon (first 29 years spent in Arizona)
1983 Eagle SX/4, 6cyl 5 speed
1970 Camaro (undergoing restoration)
1966 Ford Country Sedan wagon (30000 miles original)
1964 Lincoln Continental Convertible
1992 Chevrolet Blazer EV conversion; 100% ELECTRIC car, daily driver
1996 VW Golf Citistromer; 100% ELECTRIC car, daily driver

Offline 68AMXGOPAC

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Re: Heater fan upgrade
« Reply #10 on: February 17, 2013, 08:27:07 PM »
Easy fix, take the leads out of the connector, and reverse them, and whoolah, it will spin the other direction :hello2:

Isn't that only the case in AC voltage 3 phase motors ??
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1995 Cadillac Seville STS Norstar 32V 310 H.P. V8
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Offline carnuck

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Re: Heater fan upgrade
« Reply #11 on: February 18, 2013, 03:42:38 AM »
Easy fix, take the leads out of the connector, and reverse them, and whoolah, it will spin the other direction :hello2:

Isn't that only the case in AC voltage 3 phase motors ??


Nope. DC reverses polarity. I just had fun when I took my power window motor apart. I tried it before bolting it to the door and it worked backwards! There is a universal fan motor that has reversible leads, but I think XJ fans turn the same way
FOR SALE
'87 Comanche 4.0L AW4/NP242 3.73 gears, lifted 5" on near new 33" tires $3500 obo
'82 Eagle Wagon (Brown Betty) 4.2L/727/NP229 and soon 8.25 rear axle and non-vacuum 3.08 front to match. 235/75/15 tires. It's down to minor body work (someone creamed my driver's door but I have another in good shape) almost rust free and interior work (seats are worn and carpet torn). $2000 but about to go up due to more work being done.

Pics of my other for sale stuff http://tinyurl.com/jimsclads

Offline txjeeptx

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Re: Heater fan upgrade
« Reply #12 on: February 19, 2013, 12:01:53 AM »
I had a look at my Eagle, and it has a different blower motor mounting flange than the YJ, so the Blazer motor "upgrade" isn't for our Eagles. Can post a comparison pic for any naysayers.

Teaser: The blower motor looks similar to the one in my FSJ, though. It is probably the same part, and not an "upgrade" to a bigger blower motor, like the Jeep YJ/CJ to Blazer motor swap. I'll take a closer look sometime soon.

Nice try, yall. Good idea to have a look into an upgrade if you have the heater core out, although it looks like the Eagle blower motor can be replaced without blowing the dash apart, ie, it looks like it can be removed from under the hood. On the YJ/CJ, you have to pull the entire heater core/ducting housing to get at the blower motor, so when doing a heater core, its a great time to have a look at a newer blower motor on those Jeeps. YJ/CJ owners note, the Blazer motor upgrade requires you to enarge the blower motor hole in the firewall!
'82 Eagle SX/4 "Golden Eagle", '89 YJ rock-crawler, '79 Jeep Cherokee Golden Eagle "FSJ", 'o7 F150 Supercrew FX/4 daily driver, 'o8 Solara Convertible - and a very happy wife - she left me, total surprise, her loss.

Offline carnuck

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Re: Heater fan upgrade
« Reply #13 on: February 19, 2013, 01:58:05 AM »
I used a Chev fan in my FSJ
FOR SALE
'87 Comanche 4.0L AW4/NP242 3.73 gears, lifted 5" on near new 33" tires $3500 obo
'82 Eagle Wagon (Brown Betty) 4.2L/727/NP229 and soon 8.25 rear axle and non-vacuum 3.08 front to match. 235/75/15 tires. It's down to minor body work (someone creamed my driver's door but I have another in good shape) almost rust free and interior work (seats are worn and carpet torn). $2000 but about to go up due to more work being done.

Pics of my other for sale stuff http://tinyurl.com/jimsclads

 

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