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Old 08-14-2019, 04:16 PM   #1
SuperCookie
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Default Water leak in passenger area SC2

I though I fixed my leak problem but apparently not. Yesterday my car was dry. Then it rained last night and when i get in today there is a big puddle in the passenger foot well. I got my wet vac and sucked it up and the floor is mostly dry. But i have no idea how the water got in. After drying it i looked at all of the seals and they seem fine. I then got a gallon of water and poured it on the roof of my car near the passenger door. No water got through from what i can tell. the highest place that was damp was this hole next to the passenger door sensor button. (see picture) I have no idea what that is. Are there common spots of failure that can let water get in?


saturn passenger intierior.png

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Old 08-14-2019, 04:35 PM   #2
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Default Re: Water leak in passenger area SC2

Check the antenna base, and the oval foam thingie with the screen under the hood?

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Old 08-14-2019, 05:06 PM   #3
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by alordofchaos View Post
Check the antenna base, and the oval foam thingie with the screen under the hood?
Just went out to my car. Apparently i don’t have an antenna. Also it was a bit damp near that oval foam thing. what does the oval foam thing do?

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Old 08-15-2019, 08:05 AM   #4
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by SuperCookie View Post
Just went out to my car. Apparently i don’t have an antenna. Also it was a bit damp near that oval foam thing. what does the oval foam thing do?
The oval shaped foam gasket with screen on the passenger side just below the cowl within the engine bay is the HVAC fresh air intake. The foam keeps water from entering the HVAC and the screen keeps out critters and debris. If the foam is compromised then water will enter and it usually ends up in the passenger foot-well.

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File Type: jpg HVAC Intake.JPG (50.5 KB, 53 views)

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Old 08-15-2019, 10:14 AM   #5
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Default Re: Water leak in passenger area SC2

^ ^ ^ Yep, two good prospects to check.

Also, such a clean car!

The hole where the antenna base should be is another suspect area.

There is a mod for hidden antenna - it might be tucked under the A pillar. Whoever did that may not have done a good job of sealing the antenna hole, where the wire routes down under the dash to the radio.

I almost never listen to radio so was considering this for a rainy day, got nothing better to do, type of project.

Hasn't happened yet in near a decade

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Old 08-15-2019, 10:31 AM   #6
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by SuperCookie View Post
Just went out to my car. Apparently i don’t have an antenna. Also it was a bit damp near that oval foam thing. what does the oval foam thing do?
You might consider just making a substitute "foam thingie" from what you may already have around the house. Just glue together something like rubber foam strips (1/2" x 1/2") to make a box to go around the oval hole then glue a little nylon screening on top. Make it tidy. Glue your creation in.

Because of your post I will be making one for myself today due to having that "foam thingie" part missing.

Just a thought.

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Old 08-15-2019, 06:28 PM   #7
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by alordofchaos View Post
^ ^ ^ Yep, two good prospects to check.

Also, such a clean car!

The hole where the antenna base should be is another suspect area.

There is a mod for hidden antenna - it might be tucked under the A pillar. Whoever did that may not have done a good job of sealing the antenna hole, where the wire routes down under the dash to the radio.

I almost never listen to radio so was considering this for a rainy day, got nothing better to do, type of project.

Hasn't happened yet in near a decade
The last owner had this cheap rgb led radio in it. i think the kid thought it was ugly so he took the antenna off. this is the same person who put a fake hood scoop, beddy bop decals and other terrible decals on the car and removed the black saturn badge. I bought an antenna and i guess the foam thing is the culprit.

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Old 08-15-2019, 07:18 PM   #8
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by focusofheart View Post
You might consider just making a substitute "foam thingie" from what you may already have around the house. Just glue together something like rubber foam strips (1/2" x 1/2") to make a box to go around the oval hole then glue a little nylon screening on top. Make it tidy. Glue your creation in.

Because of your post I will be making one for myself today due to having that "foam thingie" part missing.

Just a thought.
as a stop gap could i put caulk or some silicon or heck even flex tape? I am leave for school Sunday and i have a funeral on Saturday and tomorrow i’m packing

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Old 08-15-2019, 09:14 PM   #9
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by SuperCookie View Post
as a stop gap could i put caulk or some silicon or heck even flex tape? I am leave for school Sunday and i have a funeral on Saturday and tomorrow i’m packing
After reading your post I created the solution to my problem using a triple layer of headliner material which was glued together using 3M spray glue - foam layer on outside.



I cleaned the area well then re-glued the screen piece I still had in the car, using Gorilla Super Glue Gel, to the metal. After that I glued the piece I had created to the screen.



cost was nothing as I already had the materials at home and it took about 10 minutes to create after allowing time for the headliner material glue to dry (about an hour).

P.S. I sew alot so this was easier for me to do than go purchase the rubber foam strips to use.

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Last edited by focusofheart; 08-15-2019 at 09:19 PM..

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Old 08-16-2019, 06:32 AM   #10
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Default Re: Water leak in passenger area SC2

Maybe I should re-glue, or make a new "foam thingy".... mine came off when I power washed the engine. I had no idea it would let water in.

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Old 08-16-2019, 08:46 AM   #11
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Default Re: Water leak in passenger area SC2

If you are making a new gasket the material used needs to be closed cell foam. After all, It's not supposed to allow water through.

In the case of a ripped/torn gasket I've used acoustic caulking to adhese and seal it all up again. It's messy but it works.

The other possibility would be the HVAC drain on the firewall is clogged. The A/C evaporator within the HVAC behind the dash has a drain that exits through the firewall. This allows any condensation from the evaporator to drip down and exit the interior and drip onto the ground. You can use a pen or pencil to poke into the drain and unclog it. You'd need to access it from under the car.

Here' a video >>https://www.youtube.com/watch?v=W0VdFRDdgvA and a photo of the drain location.

This post may be helpful too >>Passenger side floor is wet ...what should I look for?


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1999 SL2 MT (277,300 km @ 06/2019)
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2001 LW200 MT (3.5y)
1992 SL2 MT (5y)

:canada:

Last edited by trottida; 08-16-2019 at 08:53 AM..

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Old 08-16-2019, 09:57 AM   #12
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by trottida View Post
If you are making a new gasket the material used needs to be closed cell foam. After all, It's not supposed to allow water through.
Thanks for the insight. I will water proof that foam to be safe.

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Old 08-16-2019, 10:34 AM   #13
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Default Re: Water leak in passenger area SC2

I didn't know that little foam and screen piece did all that... Might ripped off last time I was cleaning under the hood. Guess I need to do something about it...

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Old 08-16-2019, 01:35 PM   #14
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Default Re: Water leak in passenger area SC2

Quote:
Originally Posted by trottida View Post
If you are making a new gasket the material used needs to be closed cell foam. After all, It's not supposed to allow water through.

In the case of a ripped/torn gasket I've used acoustic caulking to adhese and seal it all up again. It's messy but it works.

The other possibility would be the HVAC drain on the firewall is clogged. The A/C evaporator within the HVAC behind the dash has a drain that exits through the firewall. This allows any condensation from the evaporator to drip down and exit the interior and drip onto the ground. You can use a pen or pencil to poke into the drain and unclog it. You'd need to access it from under the car.

Here' a video >>https://www.youtube.com/watch?v=W0VdFRDdgvA and a photo of the drain location.

This post may be helpful too >>Passenger side floor is wet ...what should I look for?

well it only happens when it rains so i am more inclined to think it is the foam thing

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Old 08-16-2019, 03:43 PM   #15
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Default Re: Water leak in passenger area SC2

check the seal around the condensation drain line if you've been using the a/c a lot as well. the seal around it was bad and I just sealed the area between the drain and the firewall with some ultra black. Fairly easy to do but you do have to get under the car to see it.

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Old 08-18-2019, 09:37 PM   #16
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Default Re: Water leak in passenger area SC2

Great photos by Trottida !!

I think the Cowl vent drains are likely issue:
I ran with NO screen or dam around the HVAC entrance for several months with no ill effects.

The cowl vents get large quantity of both rain + debris.

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Old 08-18-2019, 10:22 PM   #17
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Default Re: Water leak in passenger area SC2

Mines been missing for several years I assume. It was never there for as long as I've had the car anyway. I've never seen water in the passenger foot well like a lot of others here do but I do sometimes hear water sloshing around in the passenger side of the dash after a heavy rain storm. It's always gone away the next day so I've never really worried about it. (although I probably should) I've had all the things needed to make a new screen for months now to. Maybe one day I will get around to fixing it...

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