C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Rear windshield drains

Thread Tools
 
Search this Thread
 
Old May 5, 2015 | 08:43 PM
  #1  
Franks73's Avatar
Franks73
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2013
Posts: 366
Likes: 19
Default Rear windshield drains

I think I would like to delete the louvered area behind the rear windshield of my 73. Do not think I want water hoses running through my interior. Opinions? Thanks Guys
Reply
Old May 6, 2015 | 05:26 AM
  #2  
Haggisbash's Avatar
Haggisbash
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Default

I have the rear vents open permanently to help with interior ventilation, the drain hoses were perished so I replaced them with flexible electrical conduit instead of the rubber replica pipes, it was a lot cheaper and will last a lot longer. If you don't use the vents I can't see any reason why you couldn't delete them if that is your preference, I quite like the detail they add to that area of the body.
Reply
Old May 6, 2015 | 12:06 PM
  #3  
Franks73's Avatar
Franks73
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2013
Posts: 366
Likes: 19
Default Rear louvered drains

Originally Posted by Haggisbash
I have the rear vents open permanently to help with interior ventilation, the drain hoses were perished so I replaced them with flexible electrical conduit instead of the rubber replica pipes, it was a lot cheaper and will last a lot longer. If you don't use the vents I can't see any reason why you couldn't delete them if that is your preference, I quite like the detail they add to that area of the body.
I do not think there is a ventilation effect with this. It looks to me like it just takes water that might accumulate behind the rear glass, and allows it to drain behind the rear tires. Am I missing something? Interesting thought on the detail it adds to that area. Thanks for the input.
Reply
Old May 6, 2015 | 12:31 PM
  #4  
joewill's Avatar
joewill
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
Default

this is your astro-ventilation. the vent there is for ventilation pass thru that is open when your temp is set to cold. it just so happens that the vent will collect water when it rains and that water needs to flow out. I am sure there is a wind-tunnel-buffeting theory for the reasoning of this system. closing it off may give you unintended effects.
Reply
Old May 6, 2015 | 01:49 PM
  #5  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,274
Likes: 4,366
From: Westminster Maryland
Default

Hi Frank,
First off, does your car have a/c?
If it does the vents are closed off at the interior of the car (but not the drains).
If your car doesn't have a/c then the vents are part of the astro ventilation system as jw described.
To remove the grills and fill the rear deck, or simply block the flow of air under the grills, would likely be more difficult and more costly then replacing the 2 hoses (if they even need to be replaced, and they rarely do.)
So pour some water through each grill and look for leaks in the interior.
If you don't see any you're done!
Regards,
Alan
Reply
Old May 6, 2015 | 03:37 PM
  #6  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
Default

Originally Posted by Franks73
...Do not think I want water hoses running through my interior. Opinions?...
The hoses only carry away water (rain, car wash, etc). Have you had a leak? You could crawl underneath and disconnect the plenum end of the hoses. Water will still drain but not through the body.
Reply
Old May 6, 2015 | 05:29 PM
  #7  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,274
Likes: 4,366
From: Westminster Maryland
Default

Hi,
I believe you'll find that the drain hoses are in the rear compartment on coupes but behind the rear bullhead on convertibles.
Regards,
Alan

This is a coupe, right side.

Last edited by Alan 71; May 6, 2015 at 05:31 PM.
Reply
Old May 7, 2015 | 09:25 AM
  #8  
Franks73's Avatar
Franks73
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2013
Posts: 366
Likes: 19
Default Rear Louvers

Originally Posted by Alan 71
Hi Frank,
First off, does your car have a/c?
If it does the vents are closed off at the interior of the car (but not the drains).
If your car doesn't have a/c then the vents are part of the astro ventilation system as jw described.
To remove the grills and fill the rear deck, or simply block the flow of air under the grills, would likely be more difficult and more costly then replacing the 2 hoses (if they even need to be replaced, and they rarely do.)
So pour some water through each grill and look for leaks in the interior.
If you don't see any you're done!
Regards,
Alan
Hi Alan, yes the car is factory AC. I guess I will just put in new hoses. I had pulled the original ones that were toast. I closed off the drain ports in the wheel well planning on deleting the drains. Will be easy to open them back up. Thanks for the input sir!
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old May 7, 2015 | 10:11 AM
  #9  
Joebrick's Avatar
Joebrick
Instructor
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2008
Posts: 233
Likes: 9
From: Marietta Ga
Default

I just replaced mine a few weeks ago. It's not too bad and requires a drill and a rivet gun assuming your wheel well plates aren't too rusted. Mine looked OK, but upon looking closer they were well rotted. The end of the tube is actually a flange gasket that sits under the round drain port.
Reply
Old May 7, 2015 | 04:19 PM
  #10  
oldgto's Avatar
oldgto
Safety Car
10 Year Member
 
Joined: Feb 2012
Posts: 4,705
Likes: 983
From: Orlando FL
Default

Originally Posted by Franks73
Hi Alan, yes the car is factory AC. I guess I will just put in new hoses. I had pulled the original ones that were toast. I closed off the drain ports in the wheel well planning on deleting the drains. Will be easy to open them back up. Thanks for the input sir!
Another idea for the vents is to epoxy some fiberglass window screen to the bottom of the vent trims to help keep leaves & dirt out of the plenum area too.
Reply

Get notified of new replies

To Rear windshield drains





All times are GMT -4. The time now is 06:31 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE