Water leaks from car when reversing

Tiny
RCOGZELL75
  • MEMBER
  • 2010 HONDA CIVIC
  • 1.8L
  • 2WD
  • MANUAL
  • 8,500 MILES
When I reverse the car, there is a trail of water leaking.
I bought the car in February. This leaking has only started in the last 2 weeks.
Also, where do I top up the car with water? I can't see a clear or plastic water tank, other than the windscreen wash.
Saturday, June 25th, 2022 AT 8:43 AM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,752 POSTS
I suspect you're seeing the "condensate" from running the air conditioning system. That's the condensation that forms from the humidity in the air being cooled by the AC system. That water runs down into a plastic pan, then out of the vehicle through a tube. On most cars that tube has a rubber hose with a 90 degree bend in it hanging down from the passenger side of the firewall, under the hood. That dripping water is normal. In fact, it's removing that humidity that creates the most comfort from AC systems. Home dehumidifiers work the same way.

When you have a problem is when you don't see that dripping water. That's due to the drain tube being blocked by leaves or other debris. The symptoms include water dripping onto the front passenger side of the floor, and sometimes the sound of water splashing in the dash area. To fix that, the rubber hose is removed, then something like a pencil works well to poke into the tube to dislodge the debris.

What's probably happening is the water level hasn't gotten high enough to reach the drain port, but when you back up, the water sloshes into it and onto the ground, like it's supposed to.
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Saturday, June 25th, 2022 AT 4:38 PM

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