The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-17-2020, 08:02 PM   #1
03BlkZ
Active Member
 
Join Date: Nov 2015
Location: Hewitt, Tx
Posts: 167
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.
Attached Images
 
03BlkZ is offline   Reply With Quote
Old 10-17-2020, 10:19 PM   #2
03BlkZ
Active Member
 
Join Date: Nov 2015
Location: Hewitt, Tx
Posts: 167
Re: Heater core replacement

Never mind. I just realized my gasket kit included seals for them.
Attached Images
  
03BlkZ is offline   Reply With Quote
Old 10-17-2020, 10:25 PM   #3
LockDoc
The Original Thread Killer

 
LockDoc's Avatar
 
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 21,037
Re: Heater core replacement

Quote:
Originally Posted by 03BlkZ View Post
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.

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
LockDoc is offline   Reply With Quote
Old 10-18-2020, 08:24 AM   #4
custom10nut
Registered User
 
custom10nut's Avatar
 
Join Date: Apr 2015
Location: East Tn (In the heart of the Smoky Mtns)
Posts: 1,364
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
custom10nut is offline   Reply With Quote
Old 10-18-2020, 10:23 AM   #5
Boog
laying low
 
Boog's Avatar
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 9,866
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.
__________________
Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
2 GMCs and 1 Tahoe
All GM..'nuff said,
Member of Jr Nation 88

I stand for the flag and kneel at the cross
Boog is offline   Reply With Quote
Old 10-18-2020, 10:30 AM   #6
72c20customcamper
Registered User
 
72c20customcamper's Avatar
 
Join Date: Jul 2018
Location: Napanoch new york
Posts: 2,739
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.
__________________
Mark
72 c20 custom camper Husky edition,66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark
1969 AMX ,
1968 c20 stepside
1977 Suburban sold
68 anniversary.
72c20customcamper is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:44 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com