Heater Fan Motor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Andy4639 · 03-06-2006, 10:46 PM

I know this has been asked quit a few times but I have started taking the A/C out of my truck to fix the heater core. I remember a long time back some people where saying you could put a different fan motor in place of the stock to blow more air. Does anybody have the info and could you post it please. Thanks.

sdkid · 03-07-2006, 12:39 AM

I've heard of installing an A/C fan motor in a non-A/C heater box. Nothing about upgrading an A/C fan comes to mind. In any case, bump for you.

JimKshortstep4x4 · 03-07-2006, 06:51 AM

The AC fan usually moves a lot of air and if you are having low air flow there could be other problems. The vanes on the fan deteriorate over time and there is always a chance of leaves and debris building up inside the ducts. If the motor does not have a good ground it will run slow or it could be defective. The relay and wiring should be checked, also.

You will want to make sure that the door in the air switch box is working properly.

Jim

Andy4639 · 03-07-2006, 07:27 AM

Thanks guy's, no problem with the fan, just thought since I had to take it apart for the heater core a might as well change out the fan also. I thought it was a swap for the A/C motor. It must just be for the regular heater box.

wibilly · 03-07-2006, 01:42 PM

andy i read somthing on here about that too. i think it was mid 90's blower moter. maby it was just for non air trucks mine has air too and i thought while it is apart i would upgrade as well

Andy4639 · 03-07-2006, 02:21 PM

OK back to the orignal ? then is there a upgrade for our trucks. I thought I remember it being a caddy fan. I don't remember it that well though. Anybody have any idea's.

Rdub · 03-07-2006, 04:38 PM

not sure about fan upgrade.... I seem to recall something about a caddy fan also but don't remeber if it was for ac or non-ac. There's a great write up in the faq section on replacing a non AC h. core..... how about a write up (photos?) for faq on an AC heater core replacement?

4x4Poet · 03-07-2006, 04:58 PM

AFAIK, Classic Auto Air, Vintage Air, and Old Air all claim that their aftermarket 67-72 systems come with fan motors that move more air than stock. Maybe they offer oem replacement fan motors.

To save some $$, I would prefer to find the application for a superior than oem fan motor, so btt.

cdowns · 03-07-2006, 06:09 PM

just cleaning out 35years of crap in the heater housing will give you lots more air flow

rauto13 · 03-07-2006, 06:42 PM

on my 72, the piece that goes on the fan motor shaft was spinning inside the blower wheel, it was supposed to be firmly attached to the blower wheel, but was spinning almost freely, I had a very loud squeal and very little airflow, I bought a new fan motor and replaced it, come to find out, just the blower wheel itself was bad. I have plenty of airflow now.

just grab the fan motor shaft in one hand and the blower wheel in the other, the wheel obiously shouldn't turn with the shaft being held

Just a thought

roger0080 · 03-07-2006, 06:46 PM

Here ya go (again X 2):

http://67-72chevytrucks.com/vboard/s...d.php?t=166446

I have it bookmarked because I aim to do this as well.

HotRod71 · 03-07-2006, 09:13 PM

I have the Hypercool Air/Heat/Defrost system in my truck. This thing blows more air on medium than my 03 Dodge blows on high.

Andy4639 · 03-08-2006, 01:51 PM

Ok so a blower out of a 94 chevy extended cab will work and give more air flow. Thanks roger0800 for the link. I will check on this.
Sorry about the after thought of pictures, but I was getting my truck ready for a month long trip next week. Monday I will be out of town working so I need to get this done so I can take it and have it charged back up.

03-06-2006, 10:46 PM	#1
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Heater Fan Motor I know this has been asked quit a few times but I have started taking the A/C out of my truck to fix the heater core. I remember a long time back some people where saying you could put a different fan motor in place of the stock to blow more air. Does anybody have the info and could you post it please. Thanks. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-07-2006, 12:39 AM	#2
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	Re: Heater Fan Motor I've heard of installing an A/C fan motor in a non-A/C heater box. Nothing about upgrading an A/C fan comes to mind. In any case, bump for you. __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster

03-07-2006, 06:51 AM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Heater Fan Motor The AC fan usually moves a lot of air and if you are having low air flow there could be other problems. The vanes on the fan deteriorate over time and there is always a chance of leaves and debris building up inside the ducts. If the motor does not have a good ground it will run slow or it could be defective. The relay and wiring should be checked, also. You will want to make sure that the door in the air switch box is working properly. Jim

03-07-2006, 07:27 AM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Heater Fan Motor Thanks guy's, no problem with the fan, just thought since I had to take it apart for the heater core a might as well change out the fan also. I thought it was a swap for the A/C motor. It must just be for the regular heater box. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-07-2006, 01:42 PM	#5
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: Heater Fan Motor andy i read somthing on here about that too. i think it was mid 90's blower moter. maby it was just for non air trucks mine has air too and i thought while it is apart i would upgrade as well __________________ common sense isn't so common anymore

03-07-2006, 02:21 PM	#6
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Heater Fan Motor OK back to the orignal ? then is there a upgrade for our trucks. I thought I remember it being a caddy fan. I don't remember it that well though. Anybody have any idea's. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-07-2006, 04:38 PM	#7
Rdub Registered User Join Date: Feb 2005 Location: Portland OR Posts: 74	Re: Heater Fan Motor not sure about fan upgrade.... I seem to recall something about a caddy fan also but don't remeber if it was for ac or non-ac. There's a great write up in the faq section on replacing a non AC h. core..... how about a write up (photos?) for faq on an AC heater core replacement?

03-07-2006, 04:58 PM	#8
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	AFAIK, Classic Auto Air, Vintage Air, and Old Air all claim that their aftermarket 67-72 systems come with fan motors that move more air than stock. Maybe they offer oem replacement fan motors. To save some $$, I would prefer to find the application for a superior than oem fan motor, so btt. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

03-07-2006, 06:09 PM	#9
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Heater Fan Motor just cleaning out 35years of crap in the heater housing will give you lots more air flow __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

03-07-2006, 06:42 PM	#10
rauto13 saving one more Join Date: Sep 2005 Location: Pryor Creek, Oklahoma Posts: 3,066	Re: Heater Fan Motor on my 72, the piece that goes on the fan motor shaft was spinning inside the blower wheel, it was supposed to be firmly attached to the blower wheel, but was spinning almost freely, I had a very loud squeal and very little airflow, I bought a new fan motor and replaced it, come to find out, just the blower wheel itself was bad. I have plenty of airflow now. just grab the fan motor shaft in one hand and the blower wheel in the other, the wheel obiously shouldn't turn with the shaft being held Just a thought __________________ 72 Chevy longbed - now for parts 69 Chevy short fleet - needing some love 70 RS Camaro - needing more love driver - 96 GMC X-cab

03-07-2006, 06:46 PM	#11
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: Heater Fan Motor Here ya go (again X 2): http://67-72chevytrucks.com/vboard/s...d.php?t=166446 I have it bookmarked because I aim to do this as well. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

03-07-2006, 09:13 PM	#12
HotRod71 Short, Fleet, Slammed, V8 Club Join Date: Mar 2006 Location: Kingsport,TN Posts: 450	Re: Heater Fan Motor I have the Hypercool Air/Heat/Defrost system in my truck. This thing blows more air on medium than my 03 Dodge blows on high. __________________ Bill 71 Chevy SWB Fleetside (WIP) www.4x4grace.com

03-08-2006, 01:51 PM	#13
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Heater Fan Motor Ok so a blower out of a 94 chevy extended cab will work and give more air flow. Thanks roger0800 for the link. I will check on this. Sorry about the after thought of pictures, but I was getting my truck ready for a month long trip next week. Monday I will be out of town working so I need to get this done so I can take it and have it charged back up. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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