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7/1/08 6:22am - Original Message: 'Blower fan exhaust'
terntes
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Little Rock, AR - USA

Vette(s):
1982 Collector Edition

Joined: 7/10/2007
Posts: 116

  I'm not sure what to call it.....but in the area below the windshield, where the fan intake and exhaust screens are.......this area in question; my passenger side blows air when the blower is on so I assume this is excess air exhaust, the driver side must be intake? I guess my question is should it blow air our when the blower fan is on? I would just as soon have any excess air blowing inside the car as it seems my AC outlets blow a little weak compared to a new vehicle. Any thoughts?

terntes
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7/3/08 11:18am - Reply: 'Blower fan exhaust'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
If I understand correctly, it sounds like your flaps inside the heater box might not be moving properly, or sealed properly.  There are seal kits, and vacuum line kits for cars with AC.  You might also have a vacuum actuator not functioning.

Good luck
Larry


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7/3/08 2:01pm - Reply: 'Blower fan exhaust'
terntes
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Little Rock, AR - USA

Vette(s):
1982 Collector Edition

Joined: 7/10/2007
Posts: 116
Larry,
  Thanks, I didn't know there were flaps inside. I can see the squirrel cage, after I got rid of the leaves, but I guess I need a vacuum diagram because there is a vacuum line in that area that disappears behind the passenger fender just in front of the door.
Terry.
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7/4/08 6:09pm - Reply: 'Blower fan exhaust'
acplus
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, - Canada

Vette(s):
1972, 1980

Joined: 6/23/2008
Posts: 558
In a 1972 Vette...I took a blower fan from a 1993 Cadi with a larger cage and built a round (same pattern as the fan) 3/4" spacer (good sub box board, painted flat black) between the fan and the housing, you need to make the spacer or the fan cage will hit inside...this made a great improvement for the air flow. Other Gm fans will work, s10 blazer, trucks, Suburbans etc...make sure that the cage grills are cupped the same way and the fan direction is the same.
 
A/C PLUS AUTOMOTIVE REPAIRS Orillia ON CAN


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1972 CORVETTE CONVERTIBLE BRYAR BLUE
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7/13/08 9:23am - Reply: 'Blower fan exhaust'
gurtz
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baton rouge, LA - USA

Vette(s):
1981 dark metallic blue, dark doeskin leather interior, mirrored glass T Tops, 330hp/350ci GMPP crate engine, billeted aluminum serpentine system, Dewitts with dual spalls

Joined: 8/12/2006
Posts: 391
AC Plus,
 
What do you mean by the spacer and box?  I have often wondered about installing a different blower.  My only complaint on my A/C is the volume.  A buddy has a Blazer totaled out and I was thinking of taking the blower out of his Blazer and sticking it in the vette!
 
Thanks, gurtz


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7/13/08 11:06am - Reply: 'Blower fan exhaust'
acplus
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, - Canada

Vette(s):
1972, 1980

Joined: 6/23/2008
Posts: 558
Take your blower motor out and compare it to the Blazer one see if the mounting/housing is the same and that the cage fins are cupped in the same direction...and MAKE sure that the motors go in the same direction. the spacer I mentioned goes between the motor and the heater box, to keep the motor about 3/4" out so that the cage doesn't bottom out, get some good press board and a jig saw and cut the shape of the blower motor housing where the motor mounts to the heater box, and then a round inside circle for the cage to go through...MAKE sure that nothing rubs or is to close.


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1972 CORVETTE CONVERTIBLE BRYAR BLUE
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7/13/08 1:29pm - Reply: 'Blower fan exhaust'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
acplus is right about using other GM blowers for Sharks. Most people have adapted the later, C4 blowers to use in Sharks, with the spacer, for the same reason. Waaay more air volume, as the squirrel cage is wider, and the fins on them are angled to provide more air volume, at the same blower speeds. The only issue is the cage is about 3/4" wider than the cages on a Shark, therefore you need some way to space the whole assy out a little.

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7/14/08 6:15am - Reply: 'Blower fan exhaust'
fp_vetter72 Lifetime Member
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COPPERAS COVE, TX - USA

Vette(s):
1972 corvette stingray convertible 2007 coupe

Joined: 7/6/2002
Posts: 412
Her is a link on info for changing the blower, I did mine and it works great.
 
http://home.comcast.net/~chadwick.robert/ventilation.htme This wont work, try the next link.
fp_vetter722008-07-14 03:20:32

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7/14/08 6:18am - Reply: 'Blower fan exhaust'
fp_vetter72 Lifetime Member
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COPPERAS COVE, TX - USA

Vette(s):
1972 corvette stingray convertible 2007 coupe

Joined: 7/6/2002
Posts: 412
http://home.comcast.net/~chadwick.ro...entilation.htm sorry try this one.

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7/14/08 8:15am - Reply: 'Blower fan exhaust'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
Nice info, Fred!

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Joel Adams
C3VR Lifetime Member #56    
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(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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7/14/08 7:24pm - Reply: 'Blower fan exhaust'
acplus
Former Member
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, - Canada

Vette(s):
1972, 1980

Joined: 6/23/2008
Posts: 558

Hey Fred, nice vette..I believe I have the sister vette...1972 Corvette convertible, 350, 4sp, black interior with black roof..was white roof, Bryar Blue exterior, I am about two weeks away from completion frame off resto. I would post some pics but I can seem to cut and paste...any help on posting pics???

THX


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1972 CORVETTE CONVERTIBLE BRYAR BLUE
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 Forums -> C3 Cooling and Heating Systems
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