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Wiper door canister?

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Old 03-22-2017, 11:50 PM
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Duntov
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Default Wiper door canister?

Trying to troubleshoot some issues while away from the car. Should the front nipple hold a vacuum, or can it bleed down with no adverse effect. Currently when the car is started the door will open. I can close it with a handheld vacuum pump, but it doesn't hold vacuum. If it should hold is that something the rear pylon looking thing or the front plug will help?

My current canister also the front nipple make a 90 deg bend, while replacements are straight. Some used one I've found say they were off 1970 with straight nipple. Is the straight fitting a later design or where interchangeable during 1970 model year. I'm trying to do a correct driver, otherwise would not care,
Old 03-23-2017, 12:15 AM
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CanadaGrant
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Originally Posted by Duntov
Trying to troubleshoot some issues while away from the car. Should the front nipple hold a vacuum, or can it bleed down with no adverse effect. Currently when the car is started the door will open. I can close it with a handheld vacuum pump, but it doesn't hold vacuum. If it should hold is that something the rear pylon looking thing or the front plug will help?

My current canister also the front nipple make a 90 deg bend, while replacements are straight. Some used one I've found say they were off 1970 with straight nipple. Is the straight fitting a later design or where interchangeable during 1970 model year. I'm trying to do a correct driver, otherwise would not care,
The wiper door actuator changed from straight tube to curved mid year in 71. Both are available in reproductions. You have to figure out if the leak is the outer seals or the inner vacuum diaphragm between the two sides. If it's only the outer seals leaking you can buy new ones for about 15 bucks instead of $120 for the entire unit. Usually it's the outer seals leaking and mostly the rear one around the actuator shaft.
Old 03-23-2017, 10:29 AM
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Rescue Rogers
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Do they sell repair kits for canisters and how do they come apart. I have new looking one with a bent rod
Old 03-23-2017, 11:35 AM
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Alan 71
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Hi,
Bob Demmel in Texas rebuilds and restores wiper door and headlight door actuators.
He is able to replace the seal on the inner disc (don't know what it's called) too. (Un-crimp.)
He can do just a functional rebuild, just a cosmetic re-plate, or both.
His work is thought of pretty highly.
Regards,
Alan
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Old 03-23-2017, 04:57 PM
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0Willcox Corvette
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70-71 wiper actuators looked like this.

https://willcoxcorvette.com/corvette...actuator-70-71



Use the following to test and/or repair.


Last edited by Willcox Corvette; 03-23-2017 at 05:00 PM.
Old 03-23-2017, 04:59 PM
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0Willcox Corvette
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Originally Posted by Rescue Rogers
Do they sell repair kits for canisters and how do they come apart. I have new looking one with a bent rod
Mid 1971-1972 used the one with the bent nipple.

https://willcoxcorvette.com/corvette...actuator-71-72

Old 03-23-2017, 11:51 PM
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Duntov
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My canister is holding vacuum on both sides now. Trimmed the hose on the front and seems good. Also found that one of override switches had the vacuum lines disconnected. Didn't fire it up to see if the door operates yet.

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