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'71 wiper door

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Old Apr 15, 2013 | 05:38 PM
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Reginold's 454's Avatar
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From: goshen indinana
Default '71 wiper door

My wiper door opens 30-60 seconds after turning the engine off. When i push it closed and start the engine the next time it stays down just fine. Using the over-ride switch it will function correctly. This "weird" opening doesn't happen all the time. 60 to 80% of the time. Ideas?????????
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Old Apr 15, 2013 | 08:02 PM
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I have found that the open cell foam square filter at the end of your wiper door vacuum solenoid...(located under your tach) is missing. This causes for a much faster bleed off of vacuum and allows the actuator relay to move the door to the open position. I make mine out of foam and lightly glue them WITHOUT getting glue in the end of the black nipple fitting. Everything I do this...it fixes the problem. Be patient when trying to create a hole on the foam so it fits good. Being in a hurry will only tear the foam and might not give a positive result.

DUB
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Old Apr 15, 2013 | 08:04 PM
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Usually caused by a bad check valve.
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Old Apr 15, 2013 | 08:14 PM
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Originally Posted by wombvette
Usually caused by a bad check valve.
that is what my poor memory is telling me
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Old Apr 15, 2013 | 08:24 PM
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Usually the check valve.

You can verify by blowing through it.
Should only pass air one direction.
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