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06-06-2020, 12:09 PM
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#1 |
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Registered User
Join Date: May 2016
Location: Knoxville, TN
Posts: 24
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Firewall leaks-Help
Gents: I have developed some leaks in my 78 K25. On the passenger side, it is leaking into the cab floor through the 2 heater box hose holes; and along the top/side in front of windshield under the black grate. It leaks there around the side into the large vent hole on side of cab. It is coming in under the plastic cover. Anyone had this issue and/or know the fixes? Are there any grommets or something that originally plugged the space around the hoses?
Thanks, Marvin Posted via Mobile Device Last edited by 1977ChevGMCK2025Fan; 06-06-2020 at 01:25 PM. |
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06-08-2020, 05:25 PM
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#2 |
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Senior Member
 
Join Date: Jun 2015
Location: Atlanta, GA.
Posts: 737
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Re: Firewall leaks-Help
for the space around the hoses, there is something under the box that has surely deteriorated by now. I would head down to the auto parts store and get some of the black tar like stuff that goes around the lines on an A/C truck. I don't know the official name of this stuff but it would work great in this application. At least until your ready to pull the heater box and fix it.
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Jay Gesner Atlanta, GA 1985 C10 Long Bed 4X2 LS 5.3, 4L60E Father/Daughter Project |
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06-08-2020, 05:27 PM
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#3 |
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Senior Member
Join Date: Jun 2015
Location: Atlanta, GA.
Posts: 737
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Re: Firewall leaks-Help
...this is an old box I have. Numbers may have changed since I bought this.
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Jay Gesner Atlanta, GA 1985 C10 Long Bed 4X2 LS 5.3, 4L60E Father/Daughter Project |
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06-08-2020, 06:07 PM
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#4 |
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Registered User
Join Date: Jun 2014
Location: CO
Posts: 749
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Re: Firewall leaks-Help
I would say your heater core needs replaced
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79 Chevy 2wd BIG10 350 TH400 |
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