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Fri Aug 15, 2003 10:14 pm

keifernet, thanks for the pointer on the vent removal! Any ideas on options if they bust?

Sat Aug 16, 2003 7:37 pm

74SuperDriver wrote: The vents are kinda aimed the wrong way to accomplish that. They are more like scoops.

keifernet wrote: Superman, you may be right but I think the force would push air in the vents, particularly in the winter when the windows are closed...

It seems that I had seen a drawing with airflow to reflect this, I believe it was on www.vw1303.com but I can't find the picture now. This drawing was the only thing that lead me to believe this to be true but in fact that may not be correct. I'll post the picture if I find it.

Anyhoot, my Super has A/C :D

Sat Aug 16, 2003 8:43 pm

I can setup a test...
1. Tape a streamer on either side by the vent
2. Run on the freeway with the windows closed, and dash vents only open.
3. Take someone along to watch and see which way the air goes.
4. A smoker might help, but we do not do that in my car.

Of course, This all assumes that the crescent vents are clear... In my case someone already put bondo on the body in that area...

Matt

Sat Aug 16, 2003 8:56 pm

LOL! Ok Ok.... I agree with superman... on the let's not over analyize the function of the vents! :P

I really don't know for sure anymore than anybody else, that I AM sure of.... except for superman his thing about the vents/diagram does ring a fuzzy bell in my head...

but that is a cool idea... streamers... :roll:
maybe start a new trend? :wink:

Sun Aug 17, 2003 3:35 am

Okay, and I'm just spit-balling here, there are no drain holes* incorporated into that system therefore that more leads me to believe they (the outter vents) are exit holes. If I could only find that picture, that is also fuzzy in my mind but I 'know' I've seen it. In fact, it's on my hard drive somewhere within 2,000 pictures. The streamer/smoke idea is a very good one and would put an end to this debate, use a incense instead of a cigarette.

* tomorrow in the day light I will pull the plastic out and look more into the design

Sun Aug 17, 2003 2:18 pm

Okay, I looked at the vent design today. The inward angle of the body and downward pointing of the vents suggest to me that it would create a vortex to suck air out. This along with the fact that there are no drain holes make my personal conclusion that they are exit holes.

Then again I always could be wrong (CYA). :lol:

Sun Aug 17, 2003 2:34 pm

ach60 wrote: The crescent vents were for flow through ventilation.
You had new vents in the dash & the crescent vents.
High pressure at the hood vent & low pressure at the crescent vents did the trick.

I just read this thread again and ach60 answered the design question several posts ago. The vents create low pressure (due to the inward design) and are not actual scoops (they would have to be outward for that).

Oh and...

Superman wrote: Any way we are nit-picking this to death and it can be sumed up that they suck.

Sun Aug 17, 2003 3:01 pm

Superman wrote: keifernet wrote: I think they were more for venallation of the rear window area to aid in defogging :?: Why else would the 3 plastic vents be there( on the inside ) blowing air twords/on the rear glass?

The air is not coming in the car there, those vents (on the inside) are the exit as air flows out to the vents on the outside of the car. Any way we are nit-picking this to death and it can be sumed up that they suck.

I re read all this and after looking at it myself too I was wrong they do work the way you and ach60 describe... I still contend that besides overall improved venting of the interior it has something to do with aiding the rear defogger.

and once again ... THE DESIGN SUCKED! it caused alot of rust problems!

Tue Sep 02, 2003 3:44 pm

seeing how these vents are ugly and worthless
made a template of the crescent, cut out the patch from an old door, and mig welded it into place then we grinded it down and applied some zgrip fiberglass filler as directed on the can in thin layers and sanded with 80 and reapplyed until it is level and then finished it with 150 till it was glass smooth , you cant tell they vents were ever there and the zgrip will last forever. All thats left now is maybe a light coat of glazing and some more sanding. then she will be ready for prime and paint. ill post some pics of the job so you can see how we did it soon.

Tue Sep 02, 2003 8:56 pm

That's good to physically get rid of them on the car but this does not remove the rust threat. The rust comes from behind and around the vent where the sound padding in the body holds mositure. You've successfully covered the vent exit holes but unless you do something with what's actually behind the panel on the inner part it will still rust. I seen a guy do what you did and within 2 years the whole area was full of rust bubbles from underneath.

Mon Mar 05, 2007 7:28 am

Sorry to dig up ol' bones, and I'm not here to re-start some function argument. It does not look like damnquick had staying power with the full 4 posts, I was looking forward to his pictorial. Anybody got a walk-through of this repair procedure? Hopefull with pics. I've just purchased the same problem in a '74 Standard. Any direction would help. Are there patch panels available for these two areas?