C3 Resealing heater box - NCRS Discussion Boards

C3 Resealing heater box

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  • bruce11495

    C3 Resealing heater box

    I removed the heater box to replace the heater core. It had never been apart since the factory. What product did they use to seal the box to the firewall? It was such a mess I scraped it off. Did they use "dum dum" or was it some form of caulking?
    Is there a product available now that will look the same? I noticed it is no work of art the way it is applied.....
    Thanks in advance
  • Joe C.
    Expired
    • August 31, 1999
    • 4598

    #2
    Re: C3 Resealing heater box

    Bruce:

    There is a foam rubber seal to the firewall. Far as I know, the "slop" was only used if the seal leaked during test, in which case, the sealant was very sloppily applied. It was not "dum dum". Recommend urethane windshield sealant if your heater box seal is a leaker.

    Joe

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