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Topic: defroster vent

in Forum: C3 Cooling and Heating Systems


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defroster vent

Posted: 9/4/08 11:37am Message 1 of 10
78silver
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burleson, TX - USA
Joined: 8/30/2008
Posts: 58
Vette(s): 78 silver anniversary L82 black int
I am cleaning and resealing all the components of my duct system.  When I reached the defrost vent connection there is about a 1/2 inch gap between the defrost vent connection and the controler portion of the heater box. Both pieces are secured. No way to connect them they just line up with each other. I know this is the way it came from the factory.
Is this correct or do I have a piece missing???  Im fabriating a piece to close the gap but would like to know if for some reason they aren't supposed to connect completely.



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defroster vent

Posted: 9/5/08 10:13am Message 2 of 10
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aceinthehole
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Manteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed
I've got 2 '78s but haven't paid any attention to that area yet. but I'm goin with you're gut feeling 'cause any gap in that ducting can't be correct. Obviously less efficient defrost.


Jimmy B.
Just can't wait to get on the road again.

 
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defroster vent

Posted: 9/5/08 11:50am Message 3 of 10
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rraider1
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Woodland, WA - USA
Joined: 10/14/2003
Posts: 1171
Vette(s): 1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion
Do you have a picture of this area, it has been a long time but when I was in that are of my 77 I noticed a gap I wrapped it with duct tape. now that you bring it up I to would like to know what is supposed to be there.


defroster vent

Posted: 9/5/08 12:39pm Message 4 of 10
78silver
Former Member
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burleson, TX - USA
Joined: 8/30/2008
Posts: 58
Vette(s): 78 silver anniversary L82 black int

To late for a pic.  I dont have that much patients. I fabricated a thin piece of plastic, foam insulation and pop rivits.  Im glad some else saw what I saw though and I hope the gap wasnt there for a reason.




defroster vent

Posted: 9/5/08 5:38pm Message 5 of 10
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kstyer
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
Don't make me swear to this.  I could be wrong.   I think there was a very thick piece of foam stuck to one part with adhesive.   I believe it was done that way for assembly ease.  


defroster vent

Posted: 9/5/08 7:52pm Message 6 of 10
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
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
My somewhat fuzzy rememories agree with Ken's...matter of fact, Imma thinking a 1/2" gap is prolly closer than normal!! I've seen some of the ductwork up there with gaps large enough to stick yer hand in.
All that being said, an AIM manual would be the best way to find out for sure if there was a foam seal there...anyone got a '78 AIM they care to look in? Anyone? Anyone?? Bueller?   Bueller?


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defroster vent

Posted: 9/5/08 8:14pm Message 7 of 10
mkapp7879
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Joined: 10/21/2003
Posts: 1220
No gap in the AIM. Nor foam. Looks like they just fit together. mkapp78792008-09-05 20:16:48


defroster vent

Posted: 9/5/08 8:28pm Message 8 of 10
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kstyer
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
I believe the foam was attached to the part as new, so no separate parts listing.


defroster vent

Posted: 9/5/08 8:41pm Message 9 of 10
mkapp7879
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Joined: 10/21/2003
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It does show foam seals on the other duct connections, but only like a gasket within the slip joint. Nothing very large to bridge a gap. mkapp78792008-09-05 20:45:10


defroster vent

Posted: 9/5/08 9:44pm Message 10 of 10
78silver
Former Member
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burleson, TX - USA
Joined: 8/30/2008
Posts: 58
Vette(s): 78 silver anniversary L82 black int
Mine was just a gap. No evidence of any foam or adheisive


in Forum: C3 Cooling and Heating Systems


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