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While under my baby I noticed something I can only assume isn't stock configuration. My rad cowl has a flapper door for lack of a better description. It's approx 4x8 inches and is hinged. If it isn't stock someone did a hell of a nice job cutting it out. ? is this stock? Anyone else see this before?
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I won't be at Carson City meet but bring it over and let the guys take a look at that thang.
Flapper door...... for what purpose ??
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22715
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
"Flapper door?!?!? HUH? 
Where exactly is this piece? I can't say that I've ever seen anything like that on the front of a 'Vette, up in the radiator area.
Now...on the passenger side of the cowl/firewall, down the side of the fender, there IS a hinged, "flapper door" that is the fresh air intake for the HVAC system, and it is about the size you describe. Could this be what you are looking at?
If what you are asking about is in the front, radiator area, can you get a picture of it? Ya got me curious now!
Where exactly is this piece? I can't say that I've ever seen anything like that on the front of a 'Vette, up in the radiator area.
Now...on the passenger side of the cowl/firewall, down the side of the fender, there IS a hinged, "flapper door" that is the fresh air intake for the HVAC system, and it is about the size you describe. Could this be what you are looking at?
If what you are asking about is in the front, radiator area, can you get a picture of it? Ya got me curious now!
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Send PMManteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold
1975 L48 4 speed
Mine have a rectangular cutaway about the dimensions you described. Maybe some one was reinforcing the shroud design ?
Jimmy B.
Just can't wait to get on the road again. 
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It may be there so you can remove the shroud without having to remove the water pump first.
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Former Member
Send PMManteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold
1975 L48 4 speed
Right on Darrell. That makes perfect sense. I've had them out several times without giving it a thought.
Jimmy B.
Just can't wait to get on the road again.
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Like this? These flapper shrouds were only used on 79-80 Vettes with air conditioning and the L82 motor. Electric auxiliary fan is also included with that setup. Very hard to find a replacement and expensive when you do find one.
Also part of this setup for 79 were the rubber extensions on the lower front spoiler.
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Yep that's the One!!!! Obviously it is stock! Thanks for the research now I just have to re-rivet the hinges where they are extremely loose.Be the first to like this post
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in Forum: C3 HVAC, Fuel, Emissions, and Exhaust
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