LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Heater Box/Core/Unit Questions. Pics Inside.

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Old Apr 2, 2007 | 09:47 PM
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Default Heater Box/Core/Unit Questions. Pics Inside.



Thats what my heater box looks like. Its like that to clear my longtubes, my old builder decided that was the best option to fit them in

Anyway, would this gapping hole cause me to not get heat into the car? I hda the heater on with the 396ci in the car and it wasnt blowing at all, i figured that this hole was the problem. The plan was to put some sheetmetal over it if i ever use the car again.

I still have all the heater lines etc..

So, why am i not getting heat?

Tony.
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Old Apr 2, 2007 | 09:54 PM
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Just break the rest of it out.
I love people that "fix" things with Hammers.
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Old Apr 2, 2007 | 10:17 PM
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My thoughts on why no heat, is because the hole is causing too much outside air to enter the HVAC system which is dropping the inlet temperature so much that the heater core isnt large or hot enough to heat that much air.

That is my thoughts, mainly because I am doing Thermodynamics homework hahahaha
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Old Apr 2, 2007 | 11:28 PM
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i have all thoes parts for sale if you need anything. i mean EVERYTHING, lol.
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Old Apr 2, 2007 | 11:54 PM
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Well I dont want to take the box out because I need the heater, and if i ever want the AC back i wont have to do anything major.

Im just wondering if the solution to the heat problem is as easy as sealing up that hole.

Tony.
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Old Apr 2, 2007 | 11:58 PM
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I honestly think it might fix it, from a theoretical standpoint I am almost certain thats what it might be
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Old Apr 3, 2007 | 01:04 AM
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fiberglass it
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Old Apr 3, 2007 | 01:11 AM
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Originally Posted by daniel6718
fiberglass it

How would you recomend going about that sir?

Tony.
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Old Apr 3, 2007 | 01:35 AM
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break it until you know youll have enough clearence...maybe a little more even with the firewall, closer to the actual ""radiator"" (heater core)
sand it up with some 80 grit nice and rough...around all the edges...cut out some fiberglass cloth to the size you need...then start paintbrusing on resin...do another layer after that...when youve got 2 layers...sand it smoothe...(or use an air grinder)
then use a little bondo to get it extra sexy smoothe...and paint it black...
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Old Apr 3, 2007 | 02:31 AM
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Very nice, very nice indeed.

Tony.
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Old Apr 3, 2007 | 09:26 AM
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will hooker LT's fit without smashing the box like that?
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Old Apr 3, 2007 | 09:58 AM
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Originally Posted by 94Pontiac
will hooker LT's fit without smashing the box like that?
My jethots fit fine. They are just a copy of Hookers pretty much.
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Old Apr 3, 2007 | 10:07 AM
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I suggest the fiberglass idea also. You can get the fiber cloth, resin...etc at your local hardware store. With the system like it is now...you will be breathing fumes from the engine bay with the heater on.
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Old Apr 3, 2007 | 10:36 AM
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my pacesetters fit without no mods to it.
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Old Apr 3, 2007 | 10:46 AM
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I think he had the Hedman headers which require the heater box to be modded.
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Old Apr 3, 2007 | 12:07 PM
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Yeah, cover that hole sould do the trick. But I noticed that the heaters in are cars never worked that great.
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Old Apr 3, 2007 | 02:03 PM
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Originally Posted by Tony Shepherd
With the system like it is now...you will be breathing fumes from the engine bay with the heater on.


I will be going to the store tommorow to see what i can come up with. My only concern is that the header will be so close to the fiberglass and it will mess with its strength and make it fall apart.

Tony.
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Old Apr 3, 2007 | 06:09 PM
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get it nice and scuffed up before you put on the fiberglass...i did it to my heater box bc the prevous owner cracked it...
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Old Apr 3, 2007 | 06:24 PM
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isn't that a custom weight reduction mod??

lol
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Old Apr 3, 2007 | 06:29 PM
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Originally Posted by revtime
Just break the rest of it out.
I love people that "fix" things with Hammers.
AKA the BFH mod
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