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Water coming through my passinger side firewall..

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JohnnyFresno, Oct 16, 2002.

  1. JohnnyFresno

    JohnnyFresno 1/2 ton status

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    Well I replaced my heater hose a week ago or so and since then I have noticed water leaking underneath the passenger side.. Also my carpet is wet like a mofo and up in the firewall?? area it is soaked as well.. what the [censored] is wrong here? and how can I fix it ,, thanks.
     
  2. MJF

    MJF 1/2 ton status

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    You probably damaged your heater core.
     
  3. fulltopblazer

    fulltopblazer 1/2 ton status

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    The heater core is probably leaking. kinda a PITA to change but not that bad.
     
  4. JohnnyFresno

    JohnnyFresno 1/2 ton status

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    Thanks for quick response I thought it was that at first but wasnt sure.. I will try replacing it asap..

    Thanks
     
  5. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Hehehe Well if it's rain water it's a leak in the cowel box. Open the hood and look at the fire wall. You will see a seam running the width of the truck and it goes under the AC/blower box. The water coming in from the vents at the base of the windsheild will leak through the seam into the A/C/Blowe box and get into the inside box from there.
    Skigirl had a heck of a time tracing this problem down and that's what she found. I'm not sure what she used to seal the seam but I'm sure she will see this post and fill you in.
     
  6. TX Mudder

    TX Mudder 1/2 ton status

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    Just be glad you're the driver.

    /forums/images/graemlins/tongue.gif

    Replace the heater core.
    If it'll be awhile before you can do that and you need to drive the truck now, you can easily bypass the heater core. Instead of running one line to the core and one line back from the core, just hook one line from the water pump back to itself. Pretty cheap too.
    -- Mike
     
  7. imiceman44

    imiceman44 1 ton status

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    Grim could be right, make sure it's not rain water first, and then if it is te heater, try the radiator sealers first, it worked with mine, and saved me the hastle of changing it /forums/images/graemlins/smile.gif
    It's only a couple of bucks and then if it doesn't work, you will change it.
     
  8. Skigirl

    Skigirl 1/2 ton status

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    Yea, that was a pain. Wouldn't have found it without Grimmy's help either. I sealed the cowl with a silicone sealer that remained fexible and was waterproof, found at home depot. But I think there's probably better stuff out there at auto shops. At some point I'll go over it again, just to be anal. /forums/images/graemlins/thumb.gif
     

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