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Water in my floorboard

This is a discussion on Water in my floorboard within the Classics forums, part of the General Discussion category; Its coming from the two bolts in the cowl (maybe three) that seem to disappear into the firewall, Is there ...

  1. #1
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    Question Water in my floorboard


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    Its coming from the two bolts in the cowl (maybe three) that seem to disappear into the firewall, Is there supposed to be a diamond shaped rubber gasket that goes there, they are both leaking at each coner. I am punning in new padding and a mat and wat it to be water tight and this is a new leak for me. Its not the windshield I know that, its where the cowl bolts up and do I have to remove the dashpad?

    Thanks

    Jesse
    1986 Chevy C-10 Short box!

  2. #2
    Real 4x4s' Rust ryan_thompson87's Avatar
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    Re: Water in my floorboard

    Sounds like the cowl is rotted out.

    '87 K30-355 Vortec TBI/TH350/208/Dana 60F/12B(14B Soon)/4.56s/37"Bogger/36"TSL/Ult.TBI Mods/XtremeFI FPR with vac. reference/EP241 Pump/LS1 Fans
    GMPP/Melling/Flowtech/Dynomax/Tuff Country/Motive/Hella

    07 GMC Sierra Classic - Stock.. for now


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    Re: Water in my floorboard

    I think the cowl is ok, the truck was restored last year so I don't think its rusted out but I am going to check it out tomorrow, It should be easy with my glove box removed.

    Wlll update and thanks for the reply

    Jesse
    1986 Chevy C-10 Short box!

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    Re: Water in my floorboard

    Ok, the heater box has a big crack around it so I sealed that up and no water but there is some on my drivers side too!

    Help?

    Jesse
    1986 Chevy C-10 Short box!

  5. #5
    TXX
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    Re: Water in my floorboard

    Its your heater core,it sits right behind the glove box...had the same problem..and replaced it and its all better..

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    Real 4x4s' Rust ryan_thompson87's Avatar
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    Re: Water in my floorboard

    How are you sure the windshield seal is good? These trucks are bad for it. Water will leak in come down the firewall and get the floor wet. Mine used to do it. May sound gross, but taste it. If it's sweet, you've got anti-freeze on the passenger side, but it's definantly water coming in somewhere on the drivers.
    Last edited by ryan_thompson87; 02-13-2010 at 12:12 PM.

    '87 K30-355 Vortec TBI/TH350/208/Dana 60F/12B(14B Soon)/4.56s/37"Bogger/36"TSL/Ult.TBI Mods/XtremeFI FPR with vac. reference/EP241 Pump/LS1 Fans
    GMPP/Melling/Flowtech/Dynomax/Tuff Country/Motive/Hella

    07 GMC Sierra Classic - Stock.. for now


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    TXX
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    Re: Water in my floorboard

    Quote Originally Posted by ryan_thompson87 View Post
    How are you sure the windshield seal is good? These trucks are bad for it. Water will leak in come down the firewall and get the floor wet. Mine used to do it. May sound gross, but taste it. If it's sweet,
    That is awesome....am pretty sure if you dont know what anti-feeze smells like you shouldn't own a truck!!! Yuppies

  8. #8
    Real 4x4s' Rust ryan_thompson87's Avatar
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    Re: Water in my floorboard

    Most people don't. Everyone SHOULD know what it tastes like but hardly anyone does. Your gonna get a message to resize your sig soon, so you might as well do it now.

    '87 K30-355 Vortec TBI/TH350/208/Dana 60F/12B(14B Soon)/4.56s/37"Bogger/36"TSL/Ult.TBI Mods/XtremeFI FPR with vac. reference/EP241 Pump/LS1 Fans
    GMPP/Melling/Flowtech/Dynomax/Tuff Country/Motive/Hella

    07 GMC Sierra Classic - Stock.. for now


  9. #9
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    Re: Water in my floorboard

    heater cores are notorious for leaking on these trucks. My 74 77 84 and 91 K5's all drenched the carpet on the passenger side and rusted everything to hell.

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