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Windshield Wiper Door Vacuum Control Valve

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Old Apr 6, 2011 | 06:43 PM
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Default Windshield Wiper Door Vacuum Control Valve

Does anyone have a picture of theirs installed. My car doesn't have one and there's nothing remaining of any bracket or evidence of where it's supposed to be. I have the new valve, but will be ordering the bracket and need to figure out how to get it in there. I'm tired of my wiper door closing on my wipers.

Thanks,
Scott


Last edited by shrekviper; Apr 6, 2011 at 10:07 PM.
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Old Apr 6, 2011 | 10:59 PM
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There was a bracket mounted to the cowl that this bracket mounted on. Scott, it riveted in place.

To my knowledge this part is not being made... but there should be plenty of junk cowls in scrap yards that would have this still on it. I don't have any 69-72 cowls left.. off all things< i tossed them about four years ago.. You might give contemporary Vette a ring..


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Old Apr 7, 2011 | 12:07 AM
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Thanks for the reply. I can always rely on your help and diagrams...I couldn't tell from the picture or my AIM where it actually mounted. Is the backing plate on the inside of the cowl (inside the car). What part of the right blade actually contacts the valve (arm, blade, actuator)

I saw the bracket for sale from another vendor (not to muddy the vendor waters) and was hoping it would work. I would just need to know where it would mount.

Last edited by shrekviper; Apr 7, 2011 at 12:09 AM.
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Old Apr 7, 2011 | 12:13 AM
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Originally Posted by shrekviper
Thanks for the reply. I can always rely on your help and diagrams...I couldn't tell from the picture or my AIM where it actually mounted. Is the backing plate on the inside of the cowl (inside the car). What part of the right blade actually contacts the valve (arm, blade, actuator)

I saw the bracket for sale from another vendor (not to muddy the vendor waters) and was hoping it would work. I would just need to know where it would mount.
Wow.. looks like I need to check this item and get it up on the sight.

yes, there is a pinch plate on the inside but you should see the holes where the plate was. If they filled the holes or painted over them, sand it lightly and you should find them.

I'll see if I can get this part on the site too..

Willcox
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Old Apr 7, 2011 | 12:23 AM
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The cowl area was painted so I'll do some light sanding to see if I can find any trace of the coverup. I'll fab a backing plate and see where it gets me.

Thank again.

If anyone has pics, they'd help me put it back together too.
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Old Apr 7, 2011 | 11:40 AM
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One thing to consider: The original switch had elongated mounting holes in it...so it could be moved up and down for final adjustment. The new switches (which don't last long, BTW), don't have this feature. So, you may have to use your Dremel to 'adjust' them so the switch is completely activated when the wipers are down.

Surely, someone has a photo of that part of the cowl so you can see what it looks like installed....
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Old Apr 7, 2011 | 02:56 PM
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You'll almost have to find someone with the door off to get a picture. I just went out to the shop and took a few but you can't tell squat from them.
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Old Apr 7, 2011 | 04:51 PM
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Hi sv,
I just tried too; got 2 very good pictures of nothing!
Regards,
Alan
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Old Apr 7, 2011 | 08:12 PM
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I figured as much. Thanks for trying guys. I'm pretty sure someone will find an old pic.

The bracket I found for sale has elongated holes on the side that mounts to the cowl, so maybe that'll work for the adjustment...
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Old Apr 8, 2011 | 09:52 AM
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I thought I had a better photo and I may have. I'll look. Hope the attached photo helps a little.

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Old Apr 8, 2011 | 12:35 PM
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OK. I'll try to verbally describe the location of that switch. It is located so that the 'head' of the switch is positioned under the right side wiper body, about 1 to 1-1/2 inches to the left of the hinge at the hub (the end of the wiper that fits over the splined driveshaft). The bracket needs to be positioned so that the switch is completely depressed by the wiper body when the wiper is in the 'parked' position. If the switch is not completely depressed, it will cause a partial leakage of vacuum and other operational symptoms will occur. That is why there needs to be some 'adjustment range' for movement of the switch.

Don't know if that helps or not...
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Old Apr 9, 2011 | 02:11 AM
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Originally Posted by 7T1vette
OK. I'll try to verbally describe the location of that switch. It is located so that the 'head' of the switch is positioned under the right side wiper body, about 1 to 1-1/2 inches to the left of the hinge at the hub (the end of the wiper that fits over the splined driveshaft). The bracket needs to be positioned so that the switch is completely depressed by the wiper body when the wiper is in the 'parked' position. If the switch is not completely depressed, it will cause a partial leakage of vacuum and other operational symptoms will occur. That is why there needs to be some 'adjustment range' for movement of the switch.

Don't know if that helps or not...
It's almost the impossible picture.. I thought I had an old cowl.. but tossed them out.. and you would know.. now I need one.
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Old Apr 9, 2011 | 09:36 PM
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I have my door off and I could take some shots but I dont know how to post them on here. If you send me your email I can email them to you.
Rodney
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Old Apr 10, 2011 | 09:55 AM
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Rodney, email them to Willcoxcustomerservice@willcoxcorvette.c om I'll post them up for you later today.
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Old Apr 21, 2011 | 12:34 AM
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Originally Posted by rod7515
I have my door off and I could take some shots but I dont know how to post them on here. If you send me your email I can email them to you.
Rodney
Thanks Rodney,

I've been out of town for the past week.

pm'd

Scott
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Old Apr 21, 2011 | 12:41 AM
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Originally Posted by Deacon Don
I thought I had a better photo and I may have. I'll look. Hope the attached photo helps a little.

Thanks Don,
I does help a lot for the hose routing. I got the bracket and switch now, so I just need to figure out where to mount it.

My cowl doesn't have any signs of previous holes...one more mystery to add to the list. The bracket has elongated holes where the switch mounts to it so I should be able to just bolt it to the cowl and adjust the switch at the end of the bracket.

Someone MUST have a good picture. Even when the door and vent are off, it's difficult to snap a photo

Scott
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Old Apr 21, 2011 | 12:52 AM
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Originally Posted by 7T1vette
OK. I'll try to verbally describe the location of that switch. It is located so that the 'head' of the switch is positioned under the right side wiper body, about 1 to 1-1/2 inches to the left of the hinge at the hub (the end of the wiper that fits over the splined driveshaft). The bracket needs to be positioned so that the switch is completely depressed by the wiper body when the wiper is in the 'parked' position. If the switch is not completely depressed, it will cause a partial leakage of vacuum and other operational symptoms will occur. That is why there needs to be some 'adjustment range' for movement of the switch.

Don't know if that helps or not...
7T1vette,
That does help. When I put my bracket and switch in the area, it isn't high enough to reach the wiper arm itself, but does reach the flat connecting arm underneath it. Is this what should push the switch closed? Also, I though the switch should be depressed halfway when the wiper is in the parked position.
A pic of mine.

Also, is this the right left wiper stop/bumper? Bubba's spent too much time on my car.

Scott
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To Windshield Wiper Door Vacuum Control Valve

Old Apr 30, 2011 | 10:06 PM
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anyone else???

Last edited by shrekviper; Apr 30, 2011 at 10:11 PM.
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Old May 2, 2011 | 09:32 PM
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Alan,
Do you have any pictures w/ a closeup of the valve?

I love seeing pictures of your car...
Scott
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Old May 3, 2011 | 03:06 AM
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If I remember correctly, the 68 cars didn't have the wiper safety switch. It came on '69 cars...but I'm not certain if that was a model year change or a 'running change' after the model year already began. You could have an early '69 without that switch, if it was a running change. Anyway, your positioning of that switch is pretty close. I think it should be cocked a bit, so that the switch is more perpendicular to the wiper blade body when in the parked condition. And, it needs to be fully depressed when the blade is parked...1/2 depressed will not get the job done.
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