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Thread: Water Leak-When it rains

  1. #1
    Senior Member Slimer86's Avatar
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    Default Water Leak-When it rains

    Car - AE86

    motor - 4ag

    use - Daily

    problem - Leaking water into drivers foot compartment

    occurs/started when - It rains? Can be parked and it still leaks, so not driving related.

    personal situation - Annoyed

    Water is running down the foot pedal area and collecting in the drivers foot well.
    Initially I thought it was the lack of floor plug, but replaced that, and used seam sealer and it still leaked.
    I have the feeling it is running through the join at the firewall join to the vent opening area?
    I have run water down that region, and it seems to dribble a little bit down inside, but it may have just been residual.

    So, next I am going to put talcum powder on the inside and flush water through that area to see if it displaces the talc.
    Now, what should I seal that seam up with? Generic seam sealer, and just place a fillet in the region?
    I watched an AE86 hot version vid at some point and they replaced the seam sealer on the door gutter region (roof join) with a white sealer in a silicon type dispenser tube.

    Does anyone know what the product is, and will it do the trick?

    The car is in pieces, the bonnet removed, lower windscreen shroud, front drivers guard removed, as I will be re-sealing up the front wheel area while I am at it.

    It has been raining quite a bit in Adelaide, and has got to the point that I am sick of driving with wet feet and goldfish.

    Any ideas, or recommendations on where else it may be coming from would be greatly appreciated.
    Thanks.
    Big up's for the North East Massiv'
    NSATB - New Skids Around The Block

  2. #2
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    my car and im sure most of these cars rust bad under the windscreen.

  3. #3
    Senior Member Dylan's Avatar
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    The windscreen may be leaking, generic seam sealer would be fine. The water drain isnt blocked, near the wipers?

  4. #4
    Senior Member Slimer86's Avatar
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    No, both sides are clear.
    Blowing talc on the inside and running water through the water drain (vent mesh area) appeared to highlight a dribble from the right hand guard panel/firewall/vent section.
    By the way, its a pain in the butt area to get too, its the between the join in the vent area and water drain hole (slot) on the drivers side.

    Ok, so if windscreen comes out, how does it come out, and am I better off getting a windscreen mob out to do it for me?

    I might just add, that it appears the water seeps through the firewall mat(fibrous waterlogged mat) and is wet from that corner to the steering column.
    This doesn't seem plausible to me, and makes me think it is coming in from somewhere else also.
    (talc didnt get displaced or wet in this area when I flushed the vent)
    Last edited by Slimer86; 26th August 2010 at 11:09 PM.
    Big up's for the North East Massiv'
    NSATB - New Skids Around The Block

  5. #5
    Senior Member Dylan's Avatar
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    Youll have to cut around the windscreen to break the seal. Not a particually easy job for the first time. I would get a windscreen mob to do it.
    I can't remember atm, but i'll have a look at mine tommorow to see where water might leak
    Last edited by Dylan; 26th August 2010 at 11:14 PM.

  6. #6
    Veteran biggo's Avatar
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    Maybe waith for day light and have a hunt for rust?

    Water in the cabin means theres a seal leaking somewhere.
    85' JDM TA63 GTTR sedan - Godlike
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