Vent Windows NOISE
 

my orig vent windows were old and original, but the truck was quiet, occasionally a whisper on a windy day.. Now unbearable.. are there tricks to fix wind noise on these trucks? 67 c20.. My vents are a recent rebuild..
Is it an aftermarket seal thing? what is the general experience with these, i dont want to go one piece i think its part of the charm of these trucks..
thank you
Zach

Re: Vent Windows NOISE
 

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It depends on what replacement rubber gaskets were used with the rebuild. Some seal a lot better than others. Do you have trouble getting your vent windows open and closed? Does it look like the rubber is bunching up in the bottom corners?

LockDoc

Re: Vent Windows NOISE
 

They are precision seals , they open and close ok, its both sides the same.. Not a whistle but a full blown loud wind noise even on side roads.. prob should have left them alone, they were fine sounding with the old somewhat cracked weatherstrip.. I also got a few versions of door seals around the doors from precision, including the latest version a month ago, and you have to slam the doors to get them closed.. Do folks have issues with precision ? is there another alternative? I had Honda seals in there and thought that they were the cause of the wind noise so i tried the new precision ones, now that i know its coming from the vent windows i will put the honda seals back in i guess and get rid of the precision door seals..

let me know what the consensus is on this if anyone knows.. Its literally ruining the truck drivability, i can't hear my girlfriend talking which has become an issue, sometimes that is..

Re: Vent Windows NOISE
 

Are you talking about the vent window seal or the door seals? Try taping the wing windows around the seal with some duct tape and do a test run. It should help you pin point where the noise is originating from.
I have had problems with the wing window hinge flexing so I don't open the wings anymore.

I remember back in the day both sides of the old man's K20 had folded match books under the wing window latches to keep them from whistling. :lol:

Re: Vent Windows NOISE
 

I rebuilt my wing vents and they were extremely noisy. Using tape to figure out where the noise was coming from, I finally figured out it was the wing vent seal to the door itself, not the glass to rubber in the wing vent. For now I have black tape sealing it, almost unnoticeable, but will need to figure out something when I finally get paint.

Re: Vent Windows NOISE
 

My Precision seals make noise in the same place. I stuffed some 3M caulk strip behind the seals in that spot and it made it about 50% better.

Re: Vent Windows NOISE
 

I did the tape thing last week from advice on here. It’s all coming from the glass seal for the vent. Not the frame. Precision actually rebuilt these for me and it was not a cheap thing. Where on yours is it exactly leaking from pjmorelland .?

Re: Vent Windows NOISE
 

Mine is leaking between the seal and the door frame from the bottom to the vent hinge. Initially it was making a shrill whistling noise, but now it is a dull noise with the caulk strip in there. I'm wondering if people have had good luck with brands other than Precision.

Re: Vent Windows NOISE
 

See if this thread helps at all. If you don't have time to read the whole thing start with post #29.

http://67-72chevytrucks.com/vboard/s...d.php?t=660294

Like I mentioned earlier all vent window seals are not created equal.....

LockDoc

Re: Vent Windows NOISE
 

Thank you, LockDoc. Those seals do look nicer. I wonder if they are better in terms of wind noise as well.

Re: Vent Windows NOISE
 

I don't remember getting much wind noise in the truck I used them on but I didn't drive it much before I sold it. You might PM Highwinger (the OP of the thread) and check with him.

LockDoc

Re: Vent Windows NOISE
 

Will do. Thanks!

Re: Vent Windows NOISE
 

are the vent windows themselves different in 67 vs 68..

curious how they are different.. i thought it was really just the handle..

thanks...

Re: Vent Windows NOISE
 

67 and 68 are only different as fas as the handle. [AFIK] 67s, the handle pivot is part of the frame -- carries over from the 60 - 66 style. 68s, [thru to 72] there is a 1/2'' hole in the glass for the vent window handle to pivot in.
Glass is shaped the same, so the gasket should not have to change. But I haven't re-gasketed my vent windows on the 67 or 68, so I could be wrong.
Not sure if it's pertinent to this discussion, but as I recall the '67 glass doesn't have the hole.

Re: Vent Windows NOISE
 

I sent a PM to Highwinger, but I never got a reply. I was nervous about experimenting with the classicparts.com vent window seals without feedback from someone who has used them, so I bought a set of NOS seals instead. I installed the driver side today, and as you'd expect, it is nice and quiet. It popped into the front frame of the door in a way the Precision seals never did. I did buy a set of the classicparts.com seals too, and they look and feel more like NOS than the Precision seals do.

Re: Vent Windows NOISE
 

Thanks for the followup Patrick. Nice to know they are still selling the same seals.

LockDoc

Re: Vent Windows NOISE
 

Highwinger replied today, and he said he hasn't noticed any wind noise with the classicparts.com vent window seals.

Re: Vent Windows NOISE
 

Good deal. I guess he hasn't been on the board for a while.

Thanks for the follow-up.

LockDoc

Re: Vent Windows NOISE
 

Bumping this to the top for comments on current performance. Last year I put new vent window seals in my truck along with new windshield and rear window rubber. It was Precision brand. I thought precision was considered a top seal supplier (at least for the windshield).

Anyway, my vent window make a loud rushing sound (no whistling). They fit great and look great, but you can hear the noise with the windows down a 60mph. I find my 1000 watt stereo almost useless due to these vent windows.

My questions:
1) Has anyone "fixed" a set of vents with Precision seals and what is the fix?
2) Are there any recommended aftermarket brands of complete window assys?
3) If I have to buy new seals, what brand is recommended?

Thanks in advance.

Re: Vent Windows NOISE
 

I tried to fix a set of Precision seals in my '68 C/10 by stuffing 3M caulk strip behind them along the door frame. It helped a little bit, but it didn't solve the problem, so I replaced the seals with NOS seals which did fix the problem.

I recently installed a set of the Classic Parts seals recommended by LockDoc on my '71 K/10, and they fit and sealed just as well as the NOS seals. The Classic Parts seals were slightly more difficult to get popped into the corners of the frame, but they did eventually go in. https://classicparts.com/1967-72-ven...w-weatherstrip

Re: Vent Windows NOISE
 

sbd

Re: Vent Windows NOISE
 

Click on the link I posted in post #9 of this thread.... There is a lot of good information in that whole thread.
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Re: Vent Windows NOISE
 

Yes, I read thru that post. On a side note, do you still think the repop fuzzies are the best/only brand to use?

PS> Classic industries is now selling a brand Parts Unlimited Interiors. So I'll have to find repop from a different distributor.

Available from H&H:

https://hhclassic.com/i-13715385-win...tegory:1180619

Re: Vent Windows NOISE
 

Subscribed. Good info!

Re: Vent Windows NOISE
 

It's been a few years since I have bought any and with all of the Private Equity groups buying up all of the manufacturers and distributors there is no guarantee on the quality of any parts any more.... :(

Classic Industries used to handle them. I would also check with Summit.
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