Water Leak in Back Seat Passenger Floorboard - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-29-2004, 02:25 PM   #1
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Default Water Leak in Back Seat Passenger Floorboard

I have a 94SE with Sunroof. I know that my drain tubes are leaking as I will feel the headliner above the front seat doors slighly damp after a heavy rain.

Yesterday I noticed water had gotten into the back seat floorboard near the rear fllor mats. I can't tell exactly where it came in but it looks like it came under the plastic trim piece that covers the rear door sill.

Not knowing how the sunroof drain tube go toward the rear of the car, is this likely a sundroof drain tube issue or a rear door weatherstripping issue or something else?

I guess I'll have to sit in the car and let my wife run the garden hose around the door and sunroof to see if I can see water coming in.

Any other ideas?

Thanks,

Mike
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Old 10-29-2004, 02:57 PM   #2
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yea there are sunroof drains that run down the A pillars and drains that go down the C pillars. it is likely that the rear ones are plugged or disconnected. you can drop the headliner and see if they are disconnected, if that is the case take a compressor and blow them out. Even if they are connected it is good practice to blow them clear of debris
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Old 10-29-2004, 03:57 PM   #3
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My car also leaked quite badly in the rain though I do not have a sunroof.

In my case the front door seals had actually shrunk and would no longer fit the perimeter of the frame. In both top corners the seal pulled away from the door frame, this allow water to run down the B pillar and onto the rear floor, this being the lowest point.

My solution was to get a piece of matching door seal from the scrap yard and splice in a section on the bottom. As a point of reference, I needed to add 2" on the driver'* side and 3" on the passenger side. Once the seal was completely glued back in place I sealed the top edges with a flexible thermoplastic sealant to ensure water didn't get behind the seal.

Cheers,
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Old 10-29-2004, 04:25 PM   #4
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Quote:
Originally Posted by Foghorn
My car also leaked quite badly in the rain though I do not have a sunroof.

In my case the front door seals had actually shrunk and would no longer fit the perimeter of the frame. In both top corners the seal pulled away from the door frame, this allow water to run down the B pillar and onto the rear floor, this being the lowest point.

My solution was to get a piece of matching door seal from the scrap yard and splice in a section on the bottom. As a point of reference, I needed to add 2" on the driver'* side and 3" on the passenger side. Once the seal was completely glued back in place I sealed the top edges with a flexible thermoplastic sealant to ensure water didn't get behind the seal.

Cheers,
you know what my car did the exactly same thing on the drivers side
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