C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Heater core removal

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Old May 30, 2003 | 09:39 PM
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Default Heater core removal

My heater core sprung a leak. Darn! Is this a big job? Where can I find instructions on removing and replacing and most reasonable place to purchase a new one? Thanks :)
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Old May 30, 2003 | 09:41 PM
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Default Re: Heater core removal (pole-shed)

Some say its a HUUUUUGE job requiring disassembly of most of the dashboard. Fastguy says not at all and to just remove the passenger seat (so you can lay down there), the hush panel, the ECM and then the core. :)
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Old May 30, 2003 | 10:03 PM
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Default Re: Heater core removal (scorp508)

Are we all sure that all 84/90 cores are mouted up in there the same?
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Old May 31, 2003 | 06:13 AM
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Default Re: Heater core removal (pole-shed)

forum member Scoob provides this most excellent info:

Brace yourself: http://temp.corvetteforum.net/c4/scoob//c4heater01.jpg http://temp.corvetteforum.net/c4/scoob//c4heater02.jpg http://temp.corvetteforum.net/c4/scoob//c4heater03.jpg http://temp.corvetteforum.net/c4/scoob//c4heater04.jpg
Thanx Scoob!!!!!




[Modified by 89 Paul in Cal, 3:16 AM 5/31/2003]
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Old May 31, 2003 | 08:27 AM
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Default Re: Heater core removal (89 Paul in Cal)

Maybe its just me, but I can't read the text at all. Is there anyway to blow this up so its readable? I'm probably being stupid and missing something. Wouldn't be the first time.
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Old May 31, 2003 | 08:38 AM
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Default Re: Heater core removal (vettedude85)

Those are full sized photos. Right click on each link and save them to your hard drive. Then open them with a program like http://www.irfanview.com and you should be able to see them clearly. :cheers:
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Old May 31, 2003 | 12:24 PM
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Default Re: Heater core removal (ShawnZR-1)

Thanks for the great info guys. This is going to be a real challange. I think I will just reroute the lines back into themselves at the firewall and do the job this winter so I can drive the car now. The thing is I just bought this car over E-Bay from a small dealer in utah who claimed it was a 9+ car. I had it shipped to Wi. the first time I drove it 1 mile the clutch was slipping very bad so I had to have it replaced now the heater core. The odd thing is the service records show it was replaced 7/18/2000 at 44,070 mi. the car now has 63,044 mi. (cost 217.00 labor 94.53 core) sounds reasonable . The car is a 87 vert with a traco racing motor nothing real hot (374 at crank) but does have a good balanced sound. Thanks for your help, this is a very good forum with decent members. Jim :)
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Old May 31, 2003 | 05:58 PM
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Default Re: Heater core removal (pole-shed)

The part # for the heater core is 00000001. They built the car around it. With the right toolsits not a bad job. Just takes some time. Make sure you keep your screws in order cause some look the same but have diffrent tread pitch. :)
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Old May 31, 2003 | 06:01 PM
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Default Re: Heater core removal (corvette0096)

Hopefully Fastguy will chime in, he did his in a couple hours.
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Old May 31, 2003 | 09:01 PM
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Default Re: Heater core removal (scorp508)

So are we going with the Fastguy method or the Corvette Fever method?Has anybody else done the repair?
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Old May 31, 2003 | 11:25 PM
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Default Re: Heater core removal (montie98)

A couple of hours??? The main tool must have been a hatchet. It took me three days on my '84. I know I'm not fast, but a first timer, hobbiest, is unlikely to get it done in less than a day, at least on an '84. Good luck, and...

RACE ON!!!
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Old Jun 1, 2003 | 05:39 AM
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Default Re: Heater core removal (scorp508)

Hopefully Fastguy will chime in, he did his in a couple hours.
Fast guy method might be doable with us guy who done it once before. For people who never done this before (like me last year) then YES GM build the car around the heater core.
So Fast guy method is 2 hours and all other 8-10 hrs. either way DIY so you know that you did put all the screws back and which part did you broke :rolleyes: . If you let someone else do the job, you never know homay screws he left out and how many platic pieces he broke :eek: .
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Old Jun 1, 2003 | 08:43 AM
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Default Re: Heater core removal (89 Paul in Cal)

forum member Scoob provides this most excellent info:
89 Paul -

...You been watchin' too many Bill and Ted movies... :D

...But mucho gracias for the links!... :thumbs:
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Old Jun 1, 2003 | 08:53 AM
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Default Re: Heater core removal (scorp508)

Fastguy says not at all and to just remove the passenger seat (so you can lay down there), the hush panel, the ECM and then the core. :)
Scorp -

Any idea what year Fastguy has??? I've been up in my ECM area quite often, and I don't recall even seeing the heater core...
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Old Jun 1, 2003 | 01:12 PM
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Default Re: Heater core removal (Rich B.)

Any idea what year Fastguy has??? I've been up in my ECM area quite often, and I don't recall even seeing the heater core...
1988 Coupe
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Old Jun 1, 2003 | 01:13 PM
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Default Re: Heater core removal (Rich B.)

I found his old post...
http://forums.corvetteforum.com/zerothread?id=531792
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Old Jun 1, 2003 | 05:09 PM
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Default Re: Heater core removal (scorp508)

I found his old post...
Thanks! I think I know why I didn't see it...There's something else in the way...(a door control module???)...

...Plus the usual zillion wires, ducts, brackets, and hoses... :rolleyes:


[Modified by Rich B., 5:10 PM 6/1/2003]
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