I've always hated the rain... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-22-2010, 10:16 PM   #1
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Default I've always hated the rain...

Well as I've been reading, I'm not the only one with problems when it comes to rain leaks. Recently I've been pulling gallons of water out of the rear passenger side floorboard. Fed up with this I pulled the carpet up finding it not only wet there it was wet pretty much everywhere.

So I threw out the under padding which is ruined, and sat in the car with my buddy hosing it down. We discovered 3 leaks so far, the front passenger side door, the rear passenger side door and the front drivers side down the firewall.

The first two are pretty straightfoward, I've been using silicone caulk to seal up where I think the water is getting in and using the weather stripping as a hose to drain into the cab. I also took off the weather stripping, cleaned it, and reapplied it with this rubber cement.

The drivers side fire wall has me a little puzzled however. I'm not quite sure how to approach it. My buddy is convinced that the water is getting in here, where the previous owner decided to run cables for a system through. Is this a likely cause, or is there another possible reason I may not be aware of yet?

I know my fixes may seem a bit ghetto, but I'm new to car ownership as well as being poor (having sunk most of my money into this car already) and unemployed. Can anyone throw me any suggestions?

Also I forgot I had a couple other questions. Where can I purchase replacement under padding for when this ordeal is over? And can someone recommend something better to use for reapplying the weatherstripping as I'm not sure that rubber cement is going to do any good.

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Old 01-22-2010, 10:22 PM   #2
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One thing that can drain in to that side of the car is the EVAP drain. Check in tech info about EVAP cleaning and you will find a reference to the drain tube.
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Old 01-22-2010, 10:45 PM   #3
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Alright, Thank you very much. I will look into this drain asap. Generally speaking whereabouts is it located? And what is your recommended approach to cleaning it? I apologize for my noobishness, but your write up focused mainly on the core.
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Old 01-22-2010, 10:49 PM   #4
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As I said, it only references it. But it will show you where to look. Bottom of the EVAP, just run a small wire threw it to clean it out.
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Old 01-22-2010, 10:53 PM   #5
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Ok, will do. Thanks again.
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Old 01-23-2010, 01:16 AM   #6
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Quote:
Originally Posted by Dutch Schultz View Post
My buddy is convinced that the water is getting in here, where the previous owner decided to run cables for a system through. Is this a likely cause, or is there another possible reason I may not be aware of yet?
Do you have a Sunroof? If you do, looking at the picture it looks like I see wire run through what looks like the sunroof drain. Not sure though. If you have a sun roof, pour a little water in the left front drain hole with the sunroof open and see if water comes out at that location.
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Old 01-23-2010, 02:39 AM   #7
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Quote:
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Do you have a Sunroof? If you do, looking at the picture it looks like I see wire run through what looks like the sunroof drain. Not sure though. If you have a sun roof, pour a little water in the left front drain hole with the sunroof open and see if water comes out at that location.
Sorry, I don't have a sunroof. Strictly hardtop. To clarify, that picture is from under the hood not from the interior. Thanks for the input though.

While I'm posting, does anyone have a link to detailed instructions on taking off the door panels? I want to cover all my bases on this and peeking in through the cracks it looks like the plastic sheet liner inside the door isn't secured.

I found this for a 93 Bonneville, It should be the same for my 96 right?

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Old 01-23-2010, 11:08 AM   #8
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Front Door Panel Removal
1992-99 Bonneville
Yea, I think your covered.

I noticed in the article they didn't mention anything about the door lock or speaker wire connectors. Pop the door lock/window switch out of the panel. Use a flat head screwdriver and pry up at the bottom to lift it out, disconnect it and set it aside. This will facilitate removing the panel easier.
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