Question about 2004 Pontiac Grand Prix

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Water on floorboard caused by heavy rain. possible drain plugged up. How hard is it to fix myself.

Heavy rain caused water to enter the car and saturate the passenger floorboard

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  • yadayada
    yadayada May 11, 2010

    there is no generic place the water leaks in, have the dealer leak test the car.

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  • 53 Answers

The plastic cowl that goes between the windshield and the air intake inlet for the cabin blower motor needs a seal added to it. Go to a hardware store and get a thin 3/16" thick or less weatherstripping seal and place this on the plastic cowl piece. There might already be some there from the factory but it is most likely hard and cracked. This will keep the majority of the water from running into the air intake box. Also there is suppose to be a rubber seal on the edge of the sheetmetal just above the air intake. Make sure that weatherstripping piece is in place and not torn in any way.

Posted on Jun 04, 2009

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Check the seal on the cabin air filter.there is a gasket that sits infront the will leak if its not in place

Posted on May 27, 2009

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1 Answer

Water on drivers side floorboard . Why?


If you have a sunroof it could be the drain that follows the front pillar letting out under the front fender. These hoses are known to plug and crack open releasing water into the floorboards.

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Why is there water on passanger floor after a heavy rain?


Check for leafs that are blocking drain holes on both ends . Air inlet cowl in front of wind shield. This blockage would cause water to back up and enter the Hvac air inlet.

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Water leak after rain, rear floorboards soaked? HELP!


a couple things to look at if it has a sunroof the sun roof would have drain hoses that run down in each corner next you need to look at the cowl this is the section in front of the windshield that has a drain on it as well if you find nothing there the next step would be to remove the seats and carpet and sit in the car while running water over it either way you should remove the carpet and make sure it is dry all the way threw or mold will start to grow and you will never get ride of it not good for your heath other key spots to look at is if the windshield was ever replaced it could be a poor seal

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1 Answer

Water leaks onto the passenger floorboard during heavy rain


Floor plug or plugs have fallen out most likely.There Should be some plastic plugs under the floor board outside. Look to visualy check to insure they are still in one piece.

A busted heater core will flood the passenger side floorboard when the heat is turned on.

Feb 22, 2011 | 1997 Ford Escort

2 Answers

After heavy rain I seem to be getting water in the drivers side footwell, have you any ideas what the cause maybe, I havent looked myself yet as I am a female living alone and not up on these things...


Most floor leaks that show up after sitting in the heavy rain are leaking windshields...have you had your windshield replaced before? (The windshield installation should be under warranty...at least 1 year:) If you are driving and the floorboard is filling up...the floorboard itself must have a hole or plug missing...The VW usually has floor drain plugs located under the carpet...from your description, the windshield is probably the cause...are there any window trim pieces missing? This is an annoying problem...you can also test the windshield by having someone run a garden hose on the outside while you look inside for the penetration spot or spots...Hope this helps. A glass shop might do a free inspection...

Feb 21, 2011 | Volkswagen Golf Cars & Trucks

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Plugged Drain Holes? Does anyone know where the drain holes are located on a 2004 cayenne? After leaving car outside in heavy rain, water accumulates in passenger side floor. In lighter rain, I hear a...


hello there
the drain plugs should be under your carpets 1cm round,the cause could be that your water drain hoses are plug-up.It is part of the drain from sunroof.

proporsche

Dec 17, 2010 | 2004 Porsche Cayenne

2 Answers

Water leak


sounds like you have a window seal leak.  The only other way water will leak into the car is a leaky heater core or a clogged A/C drain.  Do you have a sun roof that could be leaking?  As they have drains too. 

Apr 05, 2009 | 2006 Chevrolet Cobalt

1 Answer

Everytime it rains really hard rain gets in the car. There is a 2 or 3 inches in the passenger side floor board.


I have the same problem with my 91' 318. Water is coming in from the outside air intake at the base of the front windshield, under the black vent covers. If the basin fills up, water enters the vent system throught the outside air intake. Solution: there is a drain line at the fire wall, easily accessible between the firewall and engine block. It drains water from the basin. It becomes clogged with dirt, and prevents water from draining. However, after further inspection of mine I noticed that during periods of HEAVY rain, even a clean drain line is inadequate to drain that volume of water and the same happens. See attached link. Good Luck

http://e30.bmwdiy.info/passenger-water-leak/index.html

Jul 31, 2008 | 1993 BMW 3 Series

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