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Old 05-02-2019, 08:18 AM   #1
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Water leak behind drivers seat

2002 986 checked vents that we know about and cleared them but after a heavy shower we checked and there was still water coming in the carpet down the back right at the bottom where it meets the floor carpet was soaked any ideas ?
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Old 05-02-2019, 08:25 AM   #2
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any leaks in the top?

If you take the seats out to dry the carpet I would suggest getting a waterproof ECU case. Easy to install and worth the $.

https://www.ecudoctors.com/porsche-996-boxster-waterproof-immobilizer-case-enclosure.html
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Old 05-02-2019, 08:50 AM   #3
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doesn't appear to be any leaks in the top but can't understand where it could be coming in from ?
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Old 05-02-2019, 08:57 AM   #4
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doesn't appear to be any leaks in the top but can't understand where it could be coming in from ?
Have a friend sit inside the car, top up, while you're outside using the "shower" mode on your hose... have the friend scout for leaks. Stuff a towell behind the seat to mitigate the water under the seat. That should nail it down.

Good luck.
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Old 05-02-2019, 09:54 AM   #5
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The rear drains could be plugged, could be a tear in the rain tray (especially near where the roof pivots/seat belt spools).
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Old 05-02-2019, 10:25 AM   #6
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excuse my ignorance but is the rain tray easy to get to ?
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Old 05-02-2019, 11:16 AM   #7
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excuse my ignorance but is the rain tray easy to get to ?
IIRC It's what the drain sits into. Big plastic piece. Can't miss it. Collects water and funnels it to the drain hole. One each side.
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Old 05-02-2019, 01:09 PM   #8
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Yes, clean out the drains. You could put a chamois behind the seat until you find the problem to mitigate moisture going under the seat. You can also use Damp-Rid in the car to get rid of moisture, itís available at hardware and marine stores.
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Old 05-08-2019, 12:36 AM   #9
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just to say thank you for all your replies however this is still a mystery as the vents seem clear,the rain trays are not ripped but went out to car after overnight rain and the towel put in was soaked and the water was definitely coming down the lower back wall behind drivers seat so frustrating !!!!
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Old 05-08-2019, 04:22 AM   #10
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Ways I've seen water get into the cabin
1) Clogged drain
2) Hole in top. Either in the canvas but usually the window
3) Hole in rain tray. Usually caused by a broken control arm stabbing it.
4) Rear top flap torn or not connected
5) Water getting past bolt holes in rain tray. This happen to a car I bought for my wife. During heavy rain events water was getting past where the top frame bolts attach to the roll bar. The rain tray is sandwiched between the top frame and roll bar. I moved the frame out of the way and caulked the area before reattaching the frame.
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