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Rear window washer fluid leak

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06 Sep 2018 10:12 - 06 Sep 2018 10:13 #195730 by Bosanek
I have such a stupid issue that it makes me smile and sick at the same time. I don't know if I should consult a mechanic, an electrician or perhaps a plumber!



When I drive uphill up a significant incline, or when I park uphill, most of my windshield washer fluid leaks (sprays) out from the rear window washer nozzle.

When I am on a flat ground, both front window washer nozzles and the rear window washer nozzle work just fine - they spray with good force when I command them to, and they stop spraying as soon as I cease the commands.

I have been driving without windshield washer fluid for a few months now because it is almost pointless to pour it in the canister - I lose most of it whenever I climb up a hill ....

Does anyone have an idea what could be faulty here and what are the most accessible points in the vehicle to start checking them?
Last edit: 06 Sep 2018 10:13 by Bosanek. Reason: Better explanation

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06 Sep 2018 11:05 - 06 Sep 2018 11:06 #195734 by facade
There is a small spring loaded one way valve inside the rear door in the pipe to the washer jet.
The spring has gone, the valve is a couple of pounds from Halfords etc.

The pressure from the pump forces water through, and when it stops pumping the spring closes the valve and stops it syphoning out the tank. It also keeps the water from running back-not that it would.

You can simply fit another one in the pipe where you can get at it under the bonnet, you may find then that the water in the pipe dribbles out down the door, and it takes a couple of seconds to start squirting.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
Last edit: 06 Sep 2018 11:06 by facade.

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