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10-17-2020, 08:02 PM
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#1 |
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Registered User
Join Date: Nov 2015
Location: Hewitt, Tx
Posts: 386
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Heater core replacement
Hey guys I am working on restoring my under hood heater box and I had a question. I replaced the heater core but need to know what everyone uses to seal up the holes where the heater core nipples come thru the box. Anyone know? This is an old picture before restoration.
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10-17-2020, 10:19 PM
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#2 |
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Registered User
Join Date: Nov 2015
Location: Hewitt, Tx
Posts: 386
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Re: Heater core replacement
Never mind. I just realized my gasket kit included seals for them.
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10-17-2020, 10:25 PM
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#3 | |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,321
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Re: Heater core replacement
Quote:
Dumb Dumb/Dum Dum or strip caulk. Available at hardware or automotive parts stores. Some electrical supply places carry it too. It is a clay like sealer that doesn't harden. https://www.amazon.com/3M-08578-Blac...000PEZ1L4?th=1 LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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10-18-2020, 08:24 AM
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#4 |
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Registered User
Join Date: Apr 2015
Location: East Tn (In the heart of the Smoky Mtns)
Posts: 1,846
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Re: Heater core replacement
I used a thick bead of Black Silicone caulk
It filled the gap nicely and won’t harden and fall out |
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10-18-2020, 10:23 AM
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#5 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,947
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Re: Heater core replacement
I recently bought a box of 3M strip caulk from a local parts store. Not everyone carries it anymore but it's what I used to use 40 years ago. Wow. It's gotten expensive. $27 for one box and it was a pain to use. I won't buy that one again.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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10-18-2020, 10:30 AM
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#6 |
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Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,135
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Re: Heater core replacement
I use the 3m black for everything like this much better than the grey string robe also by 3m .
The black is a butyl tape so it sticks well . To everything I even used it on all the bed seams on the stepside.
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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