74-75 rear deck vent grills
Thread Starter
Burning Brakes
Joined: Aug 2004
Posts: 856
Likes: 2
From: Tyler Texas
74-75 rear deck vent grills
All 74-75 coupes had rear deck vent grills installed behind the rear window. Do 74-75 coupes with air conditioning have plates installed bocking off the grill openings?
I think coupes without air conditoning do not have block off plates installed.
I think coupes without air conditoning do not have block off plates installed.
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
For that matter, all 68-75s had the deck vents. For AC cars, on some model years, the vents inside the car are supposed to open and exhaust interior air out through the vents as part of th Astro-Ventilation system. With the AC on cool, the inside doors are suppose to close.
Thread Starter
Burning Brakes
Joined: Aug 2004
Posts: 856
Likes: 2
From: Tyler Texas
Mike, You are correct regarding 68-75 cars, but I think (not 100% sure) all 74-75 coupes w/air cond had actual block off plates (painted flat black) installed directly under the rear deck vent grills. In other words, the rear vents were completely non functional on 74-75 year coupes with AC.
Thread Starter
Burning Brakes
Joined: Aug 2004
Posts: 856
Likes: 2
From: Tyler Texas
Lon, Your car should have two rubber vent drain hoses. One on each side; one for each grill. Look in the area behind your seats. You should see the two rubber drain hoses. They exit into the top rear fender well. See corvette central Part No. 333060 for a photo.
Pro
Joined: Jan 2000
Posts: 741
Likes: 47
From: Indianapolis IN
Originally Posted by 72vette_454
My 72 convertible a/c car has blockoff plates in the Astro ventilation ducts in the back of the baggage area. It is original.
There is nothing under the vent grills on the decklid.
There is nothing under the vent grills on the decklid.
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Team Owner
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From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
...my '74 non A/C has the open vents, my "used to be A/C" 1975 has the block off plates.
Instructor
Joined: Jul 2006
Posts: 223
Likes: 0
From: Rhineland MO
Originally Posted by Lon Wayne
Does anybodys vents have water drains in them and would it be hard to Put them in ? Its A pain wash and dry go for A ride Runs over the back deck .
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
It wouldn't take much to fit a small drain hose to the block off plates ...
but I've never done it.
I would use a screw-on tire valve stem, remove the valve core, remove
the "inner" rubber washer, cut a groove through the inner portion to
drain flush, and install in the recesses (drilled hole).
Mount with some RTV (on/around "outer" rubber gasket on interior side) to
prevent interior leaks. Then run a small rubber hose to the side (rear
inner fender), where another stem is mounted to exit into the wheel
well. Clamps on the hoses, obviously.
Done.
Stems:
http://www.jegs.com/images/photos/30...306-2900-4.jpg
but I've never done it.
I would use a screw-on tire valve stem, remove the valve core, remove
the "inner" rubber washer, cut a groove through the inner portion to
drain flush, and install in the recesses (drilled hole).
Mount with some RTV (on/around "outer" rubber gasket on interior side) to
prevent interior leaks. Then run a small rubber hose to the side (rear
inner fender), where another stem is mounted to exit into the wheel
well. Clamps on the hoses, obviously.
Done.
Stems:
http://www.jegs.com/images/photos/30...306-2900-4.jpg
Last edited by NHvette; Nov 16, 2006 at 05:12 PM.
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
Originally Posted by NHvette
It wouldn't take much to fit a small drain hose to the block off plates ...
but I've never done it.
I would use a screw-on tire valve stem, remove the valve core, remove
the "inner" rubber washer, cut a groove through the inner portion to
drain flush, and install in the recesses (drilled hole).
Mount with some RTV (on/around "outer" rubber gasket on interior side) to
prevent interior leaks. Then run a small rubber hose to the side (rear
inner fender), where another stem is mounted to exit into the wheel
well. Clamps on the hoses, obviously.
Done.
Stems:
http://www.jegs.com/images/photos/30...306-2900-4.jpg
but I've never done it.
I would use a screw-on tire valve stem, remove the valve core, remove
the "inner" rubber washer, cut a groove through the inner portion to
drain flush, and install in the recesses (drilled hole).
Mount with some RTV (on/around "outer" rubber gasket on interior side) to
prevent interior leaks. Then run a small rubber hose to the side (rear
inner fender), where another stem is mounted to exit into the wheel
well. Clamps on the hoses, obviously.
Done.
Stems:
http://www.jegs.com/images/photos/30...306-2900-4.jpg
Pro
Joined: Jan 2000
Posts: 741
Likes: 47
From: Indianapolis IN
Originally Posted by Lon Wayne
Does anybodys vents have water drains in them and would it be hard to Put them in ? Its A pain wash and dry go for A ride Runs over the back deck .
Instructor
Joined: Sep 2006
Posts: 187
Likes: 1
From: Sioux Falls SD
I have used a piece of brass tube from the local hobby store, flaired it and drilled a hole down in there and used a countersink so I could get the pipe low enough to get all the water out. Then used some silicone to seal it. and put some on the rubber hose so it won't slide off. I've also done this on trunks too that have a habit of not draining. Copper tube works too. Steel brake line rusts out.
Safety Car
Joined: Sep 1999
Posts: 4,930
Likes: 11
From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by 72vette_454
My 72 convertible a/c car has blockoff plates in the Astro ventilation ducts in the back of the baggage area. It is original.
There is nothing under the vent grills on the decklid.
There is nothing under the vent grills on the decklid.
Same for my 71 w/ac.
