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Old 06-17-2013, 07:17 AM   #1
kevo420
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Default Water leaks into car

Hi,

Last week I had my interior out and found the passenger side floor pan had a considerable amount of water in it. There was a grey foam type material in the footwell running up the firewall that was pretty saturated. It seems logical that the water is entering either behind that foam or higher up the firewall.

I didn't have a chance to try and remove that foam but with all the rain we've been having lately I know there's probably more water making its way into the car and need to takle the leak.

Do these cars have a common place they let water ingress into the car?

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Old 06-17-2013, 07:49 AM   #2
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Default Re: Water leaks into car

If you have a sunroof, the drains like to clog up and build up water. The front ones are behind the outer kickpanels, you have to remove the door-jam cover and pull out a rubberish plug with a wire harness on it to get to the drain and then pull the drain out to clean it (while allows the water to drain).
Another common spot if the water is from the middle of the car is a leaking heater core (accompanied by a sweet/coolant smell) or the A/C drain. The A/C drain is around where the shifter cable(s) come through the firewall, located in the engine bay. A pipe cleaner or maybe a pencil works for cleaning it.

My '96 leaked water and air around the windshield, I put some RTV on the gap between the windshield & roof...solved both problems in one go

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Old 06-17-2013, 11:12 AM   #3
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Default Re: Water leaks into car

Another place to check is around the condensate drain for the air conditioner.

It is sealed with the same foam rubber you saw and it deteriorates over time. I resealed mine with rtv between the drain tube and the firewall.

So far so good.

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Old 06-17-2013, 11:19 AM   #4
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Default Re: Water leaks into car

Yet another common source is the cabin air inlet under the hood up near the windshield on the passenger side. It should have an elliptical donut seal on it. It this is cracked, dry rotted or missing, the cabin will take in water.

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Old 06-17-2013, 06:07 PM   #5
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Default Re: Water leaks into car

+1 fetchitfido. Check your coolant level. And pull the sunroof drain hoses out of their fitting, if you have them. I've had both leak on me.

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Old 06-17-2013, 08:27 PM   #6
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Default Re: Water leaks into car

Quote:
Originally Posted by BV22 View Post
Yet another common source is the cabin air inlet under the hood up near the windshield on the passenger side. It should have an elliptical donut seal on it. It this is cracked, dry rotted or missing, the cabin will take in water.
This would be one of the first and easiest items to check, and a very common failure point given the adhesive dries out on the foam donut/mesh sandwich of the vent cover. Easy to fix too -- just reglue with something more permanent, like clear silicone caulk.

The other posts are also very real possibilities but involve a bit more work/sleuthing around.

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Old 06-18-2013, 05:59 AM   #7
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Default Re: Water leaks into car

Thanks for the pointers, I believe I found the problem last night.

Quote:
Originally Posted by BV22 View Post
Yet another common source is the cabin air inlet under the hood up near the windshield on the passenger side. It should have an elliptical donut seal on it. It this is cracked, dry rotted or missing, the cabin will take in water.
This seal was missing. I likely knocked it off when I swapped my motor a couple weeks ago. Thankfully I have a parts car that still had this seal, I RTV'd it to the body. Rained last night and i didn't feel much dampness on the carpet, but the plastic-like coating on the underside of the carpet makes it hard to tell. I'll have to remove the carpet this weekend and see.

Thanks

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