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  • 1 Post By plano-doug
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post #1 of (permalink) Old 12-15-2018 Thread Starter
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Water Passenger Side Floorboard

Past few days we've had a good amount of rain, yesterday morning the ol lady texts me that she found a puddle of water in passenger front and rear floorboards.

Today I try to troubleshoot the obvious things, like the cover by the cabin filter, check sunroof, and nothing; everything looks just how it should be. I mean there was at least about 1/2 inch -3/4 inch of water sitting in the floorboard when I pulled the seats and rolled back the carpet. Actually had one of my amps and crossovers under that seat since the amp can't really fit in the trunk, amp got wet, it's toast :-( Furthermore, the carpet/padding towards the front of the firewall on the passenger side is dry!

I put a water hose on the roof and let it run down onto the windshield to see if I could see where it's coming from, even moved it to let it run over the sunroof and also over the passenger side door/window, nothing. I could'nt see anymore water in the floorboards. Trunk area seems fine. I' at a loss on what else it could be.

Any ideas? Could it possibly have something to do with the A/C?
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post #2 of (permalink) Old 12-15-2018
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Originally Posted by 2007Imp850 View Post
Any ideas? Could it possibly have something to do with the A/C?
That was my thinking. Running the defroster would have the compressor running, so you could indeed have some condensation. And, if there's a clog in the drain line, it would run over and get the floor wet.

I also wonder if cold weather might contribute to the clogged drain.

I've never had to fix one of these, so I can only repeat what I've seen in the past. I'm thinking a stiff wire inserted into the drain end might unclog it. But be careful - you don't won't to poke a hole in the hose nor damage the evaporator. A coat hanger might work, but take care to bend the kinks out - make it smooth.

HTH.

Doug

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A coworker had a similar situation with the floor constantly getting wet. He was told by the shop for his Bonneville it was the moon roof drains we're plugged. I found this video and think it may be a good source for checking the drains further. I would get a bottle of water and try the rest with the roof open to be sure.

https://youtu.be/L7S0E4xYdqU


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post #4 of (permalink) Old 12-15-2018 Thread Starter
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Thank you both!

After I read Doug's post I ran back out and took the car on a few errands with the a/c and defroster on, I had at least the defrost or a/c on the entire drive and drove for at least 20 minutes. When I got back home I checked the carpet, no new water. Then I looked under the car towards the firewall area and could see water dripping down like it normally would after running the a/c.

Next up I'm gonna double check the sunroof drains, that's the only thing I haven't really checked yet other than running the water hose on the sunroof while it was closed while I was inside checking for water.
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I had this exact same problem with my 2002 Impala, puddle of water in passenger footwell.
I know it's one Gen older than yours, but in my case it was the windshield leaking.

Just thought it worth mentioning in the off chance it helps.

Hope you find your leak.
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Quote:
Originally Posted by Keller View Post
I had this exact same problem with my 2002 Impala, puddle of water in passenger footwell.
I know it's one Gen older than yours, but in my case it was the windshield leaking.

Just thought it worth mentioning in the off chance it helps.

Hope you find your leak.
Thanks!

I have tried checking the windshield/seals around the windshield and haven't seen anything yet. I still have to check the sunroof drains as I didn't have time yesterday. I'm gonna be sure to update with what I find, if I can find it.
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