I've tried to adjust the window tip-in on my 01 Coupe Twice. However, it doesn't seem to change the fact that the passenger window breaks its seal around 87-90 MPH. It is as if the pressure overcomes a threshold and the window all the sudden starts this hissing sound. It is very irritating.

Any other ideas? I followed the tip-in instructions from the Forum. The adjuster nut underneath the reflector is no almost all the way out.

 

Closer_2001,

I remember that someone had success by moving the rearmost blow-out clip from its original position, to the rear......to the next scew which holds the weatherstrip to the top.

As I recall they may have also bent the blow-out clip inward to reduce the clearance between the glass and the clip.

Sorry, I don't remember the poster......someone may have it in their files and chime in. Possibly it was Jochen....he has posted on window adjustments in the past, I believe.

In any case...take a look at the blow out clips and see if they have excessive clearance. At speed the pressure differential between inside and outside of the car will naturally pull the glass toward the clips.

Good luck.
Mark


[Modified by MDT, 10:41 AM 10/18/2001]

 

Closer,

I ran an archive search and found the following post by Jochen regarding the blow out clip.
http://forums.corvetteforum.com/zerothread?id=127950

Hope this helps.
Mark

 

I recall reading something about pressure release vents in the rear
that get clogged and make if very hard to close the rear lid unless
the doors are open or the window is cracked .

I wonder if you could adjust or mod this (useless) C5 item to help \
equalize the pressure? Has anybody messes with the vents? \

Sure would like to see some pictures.

My car is so tight I have to crack the driver door or window for my
wife to be able to close the passenger door. God help you trying
to close the rear deck lid with the doors closed and windows up.

 

Which top are you using on your coupe? Mine only does this with the clear top, the painted one is fine.

Eric

 

I only have the Clear.

I'd be interested in trying someone else's top to see if it makes a difference.

 

I did the window tip in and moved my blow out clip.

You can see how I did it by visiting my corvette site at http://www.johndennington.com and look under the "How To's"

Good Luck.

 

You should check the seals on the top where the meet the A-piller and b-piller. I have had problems similar to what you discribe because one the ends was curled and not meshing well with the weather strip it was mated with.

 

I too had the wind noise at higher speeds and it was from the side windows being pushed out from the weatherstrip. If you raise the hatch and reach around the pillar, you can push out on the top rear corner of the window and see when the glass moves away from the weatherstrip creating the wind noise. As you go faster, the air pressure builds up on the inside of the car while the air on the outside is being blasted around the windshield and crating a lower pressure area on the outside of the side windows. The two together will push the side windows out. Some forum members have adjusted the tip-in with some success, but if you get this over done, you may damage the weatherstrips when you roll the windows up. I would suggest correcting the problem with the blow-out clips. Originally on 97’s and early 98’s, the blow-out clips was positioned on the front or first screw of the weatherstrip retainer. Sometime in 98 they started putting the clip on the second screw of this strip. I have moved the blow out clip to the third screw and have adjusted it down near the glass so only a sheet of paper will slide behind it when the window is up. Compare the position of my blow-out clip in the picture to where your blow-out clip is located.



There are four screws that hold the weatherstrip retainer in place and the clip can be located on any one of them. I have had no wind noise since I have done this and the glass will not touch the clip when you open and close the door if the glass is properly positioned. You can do this yourself if you pay great attention to detail. The biggest risk is ending up with leaks because you don’t get the retainer or weatherstrip sealed properly to the top. After the dealer worked on mine twice, while I watched him, I took it home and sealed the weatherstrip properly, haven’t had any leaks or wind noise for the last 30,000 miles.

Good Luck with what you decide to do.



[Modified by alanh, 8:32 PM 10/18/2001]