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Old 06-20-2018, 08:06 PM   #1
TimT
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1996 SW2
Default Water leak

1996 SW2 . I am replacing the carpet in my wagon and when I pulled it up I found water on the passenger side floor board under the carpet. It looks like it is coming from behind the sound deadening pad o the firewall. Anyone have any ideas on where this is coming from?

Tim

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Old 06-20-2018, 10:44 PM   #2
Chub
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1995 SC2
Default Re: Water leak

Two most likely culprits:

1) the smile joint between the firewall and the spaceframe

2) your A/C drain is clogged and the condensation is draining into the car

To fix option 1, it is a pain in the neck but you will have to reseal the firewall seal that has now rotted. For option 2, stick a pencil or other object into the A/C drain and check that it doesn't have crud in there clogging it up. Try option 2 first and check for a proper drain / puddle under car. If you think it is option 1, I tacked this repair and I can give you some tips but it is anything but fun or easy.

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Old 06-21-2018, 08:40 AM   #3
ErikTande
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Default Re: Water leak

Does it smell like coolant by chance? If so it might be a leaky heater core.

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Old 06-21-2018, 09:10 AM   #4
Cheyne
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2000 SL2
Default Re: Water leak

Check the oval-shaped foam gasket/screen on the fresh air intake located on the cowl on the passenger's side under the hood.

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Old 06-21-2018, 09:40 AM   #5
TimT
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1996 SW2
Default Re: Water leak

Where is the AC drain? Will check the gasket. And look at the fire wall.
Does not smell or look like coolant it is definitely water.
Thanks again
Tim

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Old 06-21-2018, 11:26 AM   #6
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2002 SC2
1998 SL2
Default Re: Water leak

Quote:
Originally Posted by TimT View Post
Where is the AC drain?
Tim, meet our good friend, richpin

https://www.youtube.com/watch?v=W0VdFRDdgvA

He has a metric tonne of Saturn-specific videos.

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Old 06-24-2018, 11:34 AM   #7
TimT
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1996 SW2
Default Re: Water leak

Update on the water leak. Checked the AC drain and it's clear. Ran a brush and a long zip tie up it. Thanks for the richpin link. The firewall seal looks good. The fresh air seal was dry rotted and there is a hole next to it that at one time was sealed with silicon. The hole was not sealed and the plug fell out. So I made a new seal out of rubber insulation I got at Home Depot and used the old screen. I then got a rubber plug from Pep Boys and put that in the hole with some silicon . Time will tell if I got it worked out.

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Old 06-24-2018, 04:23 PM   #8
Cheyne
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2000 SL2
Default Re: Water leak

The gasket at the fresh air intake was most likely the cause. Your repair will work if you didn't use the really thin material where the water could overrun it. I keep a roll of EPDM in the shop as it has many uses.

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Old 06-26-2018, 03:26 PM   #9
hholbein
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1997 SW2
Default Re: Water leak

Quote:
Originally Posted by Cheyne View Post
The gasket at the fresh air intake was most likely the cause. Your repair will work if you didn't use the really thin material where the water could overrun it. I keep a roll of EPDM in the shop as it has many uses.
+1 on that. The foam screen sandwich that vents the cowl area is a pretty flimsy design and a frequent source of passenger-side floor leaks. The peel&stick adhesive goes first, and then the foam starts to disintegrate. I think I ended up refabricating it and gluing it in place with silicone. Must be 8+ years on the repair, and no problems since.

Another weird sort of leaks can be the rubber drains in the firewall for the cowl. Over the years tree droppings and dirt can plug them up, especially the ones under the wiper motor/transmission assembly. The buildup over decades can be significant, so removing/cleaning/replacing these is another quick fix.

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