'74 heater core seals
Thread Starter
Pro
Joined: May 2010
Posts: 737
Likes: 3
From: Pennington NJ
'74 heater core seals
Heres a real quick question- I'm rebuilding my heater box right now on my non-ac 1974, and the instructions sent with the kit say to "seal the lower channels under the heater core with butyl tape, which will use 8" per side. I did the top and bottom, which used about 8", but since it is not square and it says it needs 8", I am hesitant about using up the butyl tape that was included if I dont need it. Should I seal with the butyl tape all around the heater core, or just the top and bottom? Will I still have enough (it says 53") to do the firewall seal with it?
Will
Will
Thread Starter
Pro
Joined: May 2010
Posts: 737
Likes: 3
From: Pennington NJ
Will
Terrorizing Orange Cones
Joined: Oct 2007
Posts: 2,572
Likes: 17
From: Northern CO
I also have a non-AC car.
This is my inside heater box after rehab. The kit I purchased included the gasket that is in 2nd image.
You are asking about perimeter of the engine-side box then, correct? This is the quickest shot I could find of that piece.
Whatever length it takes to fill in the perimeter, I suppose. Again, the kit I had came with a premeasured gasket and I simply peeled and stuck before mounting.
Hope that helps.
This is my inside heater box after rehab. The kit I purchased included the gasket that is in 2nd image.
You are asking about perimeter of the engine-side box then, correct? This is the quickest shot I could find of that piece.
Whatever length it takes to fill in the perimeter, I suppose. Again, the kit I had came with a premeasured gasket and I simply peeled and stuck before mounting.
Hope that helps.
Terrorizing Orange Cones
Joined: Oct 2007
Posts: 2,572
Likes: 17
From: Northern CO
Found this picture to show layout of the perimeter.
Here's mine as it was removed. You can see the outline of where the factory laid down the original tape or gasket.
( Note the hand written datestamp of "10-8" inside box; my car's BD is alleged to be 10-13-1971 according to the door jamb tag. )
Mo' better?
Here's mine as it was removed. You can see the outline of where the factory laid down the original tape or gasket.
( Note the hand written datestamp of "10-8" inside box; my car's BD is alleged to be 10-13-1971 according to the door jamb tag. )
Mo' better?
Last edited by Dustup7T2; Apr 30, 2012 at 04:51 PM. Reason: add text
Thread Starter
Pro
Joined: May 2010
Posts: 737
Likes: 3
From: Pennington NJ
Found this picture to show layout of the perimeter.
Here's mine as it was removed. You can see the outline of where the factory laid down the original tape or gasket.
( Note the hand written datestamp of "10-8" inside box; my car's BD is alleged to be 10-13-1971 according to the door jamb tag. )
Mo' better?
Here's mine as it was removed. You can see the outline of where the factory laid down the original tape or gasket.
( Note the hand written datestamp of "10-8" inside box; my car's BD is alleged to be 10-13-1971 according to the door jamb tag. )
Mo' better?
I also have a non-AC car.
This is my inside heater box after rehab. The kit I purchased included the gasket that is in 2nd image.
You are asking about perimeter of the engine-side box then, correct? This is the quickest shot I could find of that piece.
Whatever length it takes to fill in the perimeter, I suppose. Again, the kit I had came with a premeasured gasket and I simply peeled and stuck before mounting.
Hope that helps.
This is my inside heater box after rehab. The kit I purchased included the gasket that is in 2nd image.
You are asking about perimeter of the engine-side box then, correct? This is the quickest shot I could find of that piece.
Whatever length it takes to fill in the perimeter, I suppose. Again, the kit I had came with a premeasured gasket and I simply peeled and stuck before mounting.
Hope that helps.
Here is what I'm talking about. I already have the seals in the one set of channels, but do I also need it on the ridges that are purpendicular to the seals that are already installed or does it look good as is?
Heres the codes in my blower box....do they mean anything to you guys? My car is a 1974 built September 19, 1974.
Thanks,
Will
Terrorizing Orange Cones
Joined: Oct 2007
Posts: 2,572
Likes: 17
From: Northern CO
Ohh... dat one...
Yours is looking very nice!
After I removed the box, here's where the factory had any sealant or gasket. Bottom is the right side of first photo. I see what appears as (black?) sealant along the left side and along the top and approximately, a third down the right side and almost nothing along the bottom:
When I placed the heater inside, I only used a couple of 4" long strips of foam insulation along top and bottom to keep the core from rattling. I imagine that is the goal: to keep the heater from rattling against the box.
This is just prior to heater install.
Yours is looking very nice!
After I removed the box, here's where the factory had any sealant or gasket. Bottom is the right side of first photo. I see what appears as (black?) sealant along the left side and along the top and approximately, a third down the right side and almost nothing along the bottom:
When I placed the heater inside, I only used a couple of 4" long strips of foam insulation along top and bottom to keep the core from rattling. I imagine that is the goal: to keep the heater from rattling against the box.
This is just prior to heater install.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Pro
Joined: May 2010
Posts: 737
Likes: 3
From: Pennington NJ
Ohh... dat one...
Yours is looking very nice!
After I removed the box, here's where the factory had any sealant or gasket. Bottom is the right side of first photo. I see what appears as (black?) sealant along the left side and along the top and approximately, a third down the right side and almost nothing along the bottom:
When I placed the heater inside, I only used a couple of 4" long strips of foam insulation along top and bottom to keep the core from rattling. I imagine that is the goal: to keep the heater from rattling against the box.
This is just prior to heater install.
Yours is looking very nice!
After I removed the box, here's where the factory had any sealant or gasket. Bottom is the right side of first photo. I see what appears as (black?) sealant along the left side and along the top and approximately, a third down the right side and almost nothing along the bottom:
When I placed the heater inside, I only used a couple of 4" long strips of foam insulation along top and bottom to keep the core from rattling. I imagine that is the goal: to keep the heater from rattling against the box.
This is just prior to heater install.
It looks like what I have is what I'll go with. Like you said, it is really only to stop it from rattling.
Thanks for all of the help with this, I'm off to go finish the heater box.....
I'll post back once it is done.
Will
