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2008 Toyota Tundra Water Leak

Discussion in 'General Tundra Discussion' started by EdgeWater175, Dec 7, 2015.

  1. Dec 7, 2015 at 9:04 AM

    EdgeWater175 [OP] New Member

    Dec 7, 2015
    2008 Toyota Tundra 4x4 - CrewMax Limited
    I have 2008 Toyota Tundra CrewMax Limited 4x4 that has a water leak somewhere. When I turn to the right, and only the right, I can hear water gushing (sounds as if someone is pouring a glass of water) in the floor board

    The carpet is wet under the passenger seat only and if I lift the plastic step against the door, there is some water in both the front and back passenger side. In addition, I can see water dripping from under the truck on the passenger side (where the external frame connects and forms a bit of lip (the drain plugs are just to the right of this and I have removed those without any water dripping out.

    I sealed the third break light with silicon based on the Toyota dealer stating this was the source of the leak.

    I am at a loss as to where the source of the leak is. Based on my non-mechanical description, does anyone have any input and recommendation based on my issue? Thanks for any help!
  2. Dec 7, 2015 at 9:13 AM

    Sean266 #ThinBlueLine Staff Member

    Jan 5, 2014
    Welcome to the forum! Check out our "Ask a Toyota mechanic" thread under general discussion.
  3. Dec 7, 2015 at 2:31 PM

    mtntop New Member

    Jul 14, 2015
    My 2004 had a heavy leak on the passenger side when it rained. There is a screw among others which holds down the grill near the front window. The screw sits right over the intake for the fan on the passenger side and it had a rubber grommet around it, the rubber cracked and water would leak into the fan housing and then run onto the floorboards, heavy rain = a lot of water in the truck on the passenger side, and the fan housing has a rubber seal around it so it would hold water too. Jace had a good idea, apply water at specific points so you can determine where it is entering the truck. It took me a couple of days to find the leak from this one screw!
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