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Pontiac Bonneville Water Leaks

101 messages,  Last post on Nov 21, 2009 at 5:26 PM

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What is this discussion about? Pontiac Bonneville, Sedan


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#1 of 101
Water Issues by patval4582
Oct 24, 2007 (7:00 pm)
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I have a 2000 Bonneville SSE-I and we just got a huge amount of rain here in Cincinnati and my rear driver floor board is accumulating water and no where else.
 
I can not find wet spots on the roof or door area. Get this I vacuumed it up this morning at a Car Wash paid a couple bills maybe 15 minutes later AFTER cleaning it real good BAM again an inch if water same area and no water marks anywhere.
 
I know under the driver and passenger seats there are vents maybe from there please give me some light on this.
 
Thank you,
 
Paul
#2 of 101
Re: Water Issues [patval4582] by imidazol97
Oct 25, 2007 (4:35 am)
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Replying to: patval4582 (Oct 24, 2007 7:00 pm)

Those leaks seem to be related to
 
1) door seal inside door which is a plastic sheet held by a butyl-like sticky caulk that sometimes loosens or is not replaced during a repair and lets water in
2) sunroom drain lines not draining properly and water gets into floor area
3) a trunk leak
 
I have sent some more information about leaks to your carspace email account here on Edmunds. Click on the grey bar word "Mailbox" in the top of this page and read the email from there.
#3 of 101
Re: Water Issues [imidazol97] by patval4582
Oct 25, 2007 (4:58 am)
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Replying to: imidazol97 (Oct 25, 2007 4:35 am)

I am dumbfounded by this issue because I do not see water stains anywhere and get this all the seals are beautiful because before I got it was a garaged car so the seals and whole car look brand new.
 
I did not get an email from you I opened the email box and the pop screen came up I pressed check email and nada.
 
Thank you,
 
Paul
#4 of 101
Re: Water Issues [patval4582] by imidazol97
Oct 25, 2007 (5:10 am)
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Replying to: patval4582 (Oct 25, 2007 4:58 am)

I just checked my carspace email page and it says it was sent at 5:39 am (Pacific time). I jsut resent a copy and a carbon came back to me at my account.
#5 of 101
Re: Water Issues [patval4582] by feedex
Nov 15, 2007 (1:32 pm)
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Replying to: patval4582 (Oct 25, 2007 4:58 am)

Hi, I have the same issue with my 1999 Bonneville. Were you able to find the cause? Thanks.
 
C. J.
#6 of 101
Water issue by steve167
Nov 16, 2007 (6:18 pm)
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Recently purchased 2003 Bonneville SLE. Discovered rear floor on driver's side was wet. Dried it out completely. Took it through the car wash a couple of times, had a little rain, never saw evidence of leaking anywhere. Rear floor again extremely wet!! Front slightly wet. Removed drivers seat, took all carpet out, the floor slopes to the back. No obvious holes or cracks in floor. Can't figure it out. Has happened three times in the last month.
 
Would appreciate any suggestions.
#7 of 101
Re: Water Issues [feedex] by steve167
Nov 16, 2007 (6:25 pm)
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Replying to: feedex (Nov 15, 2007 1:32 pm)

Just curious...do you have a sunroof?
#8 of 101
Re: Water issue [steve167] by imidazol97
Nov 16, 2007 (6:44 pm)
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Replying to: steve167 (Nov 16, 2007 6:18 pm)

You're right about sunroof. Sunroof drains can block up. They come out behind the front wheels IIRC from another site where this is discussed a lot.
 
Also, the water shield inside the front doors can be loose especially if the door has ever been serviced for window problems. The plastic is glued to the metal frame with a butyl caulk. This lets water through that drains into the door around the windows and then it gets onto the floor. Also check the rubber seals around the perimeter of the door.
 
Do you have water in the bottom of the trunk in the spare well?
#9 of 101
If by imidazol97
Nov 16, 2007 (7:01 pm)
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If you have a sun room pour water into the trough and watch for it to come out under the car or back up as you pour it in rather than go through one of the 4 drains.
 
If you have possible door leaks, spray them with a garden hose and then inspect for water running down the plain metal at the bottom of the doors.
 
I have picture help for both of these. I can send articles to your carspace email address here on edmunds if you activate those. Or you can send an email to my address in my profile. Click on the use name that shows who posted to see their info and profile; one of my emails is there.
 
Or send to my carspace email which is my user name plus the "at" sign and carspace.com
#10 of 101
Re: Water issue [imidazol97] by steve167
Nov 17, 2007 (5:53 am)
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Replying to: imidazol97 (Nov 16, 2007 6:44 pm)

Found the problem-after removing carpeting and wiping up the floor, I ran the hose on the sunroof and water came in the car right behind the emergency break pedal. Becauase of the slope of the floor to the back it runs down the channels in the floor pan and pools on the back seet floor. The sunroof drain tube comes down the left side of the windshield behind the plastic molding, through a hole in behind the dash. It's supposed to drain outside of the car but wasn't.
 
So far no water in the spare well.
 
Thanks for the info!

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