C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

ac heater core

Thread Tools
 
Search this Thread
 
Old Nov 24, 2009 | 08:00 PM
  #1  
63two's Avatar
63two
Thread Starter
Advanced
15 Year Member
 
Joined: Nov 2006
Posts: 64
Likes: 1
From: Western mass
Default ac heater core

Hi -Help my 73 has a heater core with a bad leak . Has any one out there tried to replace one. ? What kind of a mess should I expect Thanks in advance Steve B Western Mass
Reply
Old Nov 24, 2009 | 08:22 PM
  #2  
wnmech's Avatar
wnmech
Drifting
10 Year Member
 
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
Default

I did my heater core on my 77 a few years back. It's not too bad of a job. You have to remove the passengers side dash pad and I think the center gage cluster has to come loose also. Once you get into it there are I think clips that hold the box together and they have a nut on the under side of your hood on the evaporator box if you have A/C. here is a link to replaceing it also.
http://www.corvettemagazine.com/tech...x-rebuild.html
Reply
Old Nov 25, 2009 | 08:09 AM
  #3  
Paul L's Avatar
Paul L
Team Owner
15 Year Member
 
Joined: Aug 1999
Posts: 30,995
Likes: 98
From: Ontario
Default

Do a search of the archives. There are a number of threads with pics on this subject.

Yes, I have done that job. It's cruel and unusual punishment.

Reply
Old Nov 25, 2009 | 09:47 AM
  #4  
jdp6000's Avatar
jdp6000
Melting Slicks
10 Year Member
 
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Default

Originally Posted by 63two
Hi -Help my 73 has a heater core with a bad leak . Has any one out there tried to replace one. ? What kind of a mess should I expect Thanks in advance Steve B Western Mass
Search for threads as suggested. I did it on my 82. Wasn't that bad for me. Center guage cluster has to come out and dash pad on passengerside. Hoses going to the core on the engine side have to come off or be cut off at the core. Everything else is just nuts and bolts to remove.

For now you could always cut the hoses off at the core and link them together bypassing it. Of course thats if you don't need heat.

Don't cheap out on the core. Some after market ones don't fit perfectly. Bending the parts to get them to fit may cause the new core to leak. Get one that fits perfectly.

Jim
Reply
Old Nov 25, 2009 | 12:25 PM
  #5  
TopGunn's Avatar
TopGunn
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
Default

I've done my 75 and I agree with Paul. It does give you a chance to check the heater door seals and other claptrap in the heater/ac box. As long as you take your time and don't get too frustrated it's not a bad project. Beer helps ease the pain
Reply
Old Nov 25, 2009 | 01:13 PM
  #6  
Paul L's Avatar
Paul L
Team Owner
15 Year Member
 
Joined: Aug 1999
Posts: 30,995
Likes: 98
From: Ontario
Default

Originally Posted by TopGunn
I've done my 75 and I agree with Paul. It does give you a chance to check the heater door seals and other claptrap in the heater/ac box. As long as you take your time and don't get too frustrated it's not a bad project. Beer helps ease the pain
A tip! This is the external firewall stud/nut/fastener that can cause a lot of grief if you don't know it's there.

Reply
Old Nov 28, 2009 | 06:56 PM
  #7  
AT-82Collectors's Avatar
AT-82Collectors
Instructor
Supporting Lifetime
15 Year Member
 
Joined: Jan 2005
Posts: 172
Likes: 2
From: Cumming GA
Default

Originally Posted by TopGunn
I've done my 75 and I agree with Paul. It does give you a chance to check the heater door seals and other claptrap in the heater/ac box. As long as you take your time and don't get too frustrated it's not a bad project. Beer helps ease the pain
Well the heater core on my ’82 has started leaking. After reading many of the posts on this subject the one thing I have not found is a ballpark number on how many 12 ounce adult beverages it will take to complete this project. For me I believe the cost to have it done will be less than the cost of the heater core, parts I break and refreshments.

Reply
Old Nov 28, 2009 | 08:29 PM
  #8  
Willcox Corvette's Avatar
0Willcox Corvette
Former Vendor
 
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Default

At-

It's really not that hard of a job if you know what to take out. Look over past threads and you should get a good grasp of how it's done.

On your car you can't take out the passenger side dash pad, but it is a job you can do from under the pad. Takes us about 3 hrs. I'm not positive, but it takes us about three hours start to finish to install the core on your car. Earlier 77 and back cars can actually be done a little faster.

Willcox
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Nov 28, 2009 | 09:08 PM
  #9  
TopGunn's Avatar
TopGunn
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
Default

Originally Posted by AT-82Collectors
Well the heater core on my ’82 has started leaking. After reading many of the posts on this subject the one thing I have not found is a ballpark number on how many 12 ounce adult beverages it will take to complete this project. For me I believe the cost to have it done will be less than the cost of the heater core, parts I break and refreshments.

Well, honestly it's cheaper to start drinking AFTER the core is replaced as a reward for a job well done. Drinking during replacement is hazardous to your car's health Like Willcox says, it's really not too bad.
Reply
Old Nov 28, 2009 | 11:38 PM
  #10  
WhiteC3's Avatar
WhiteC3
Racer
 
Joined: Nov 2009
Posts: 289
Likes: 0
From: Franksville Wisconsin
Default

I need to do this too! I just looped hoses together bypassing the heater for now. I only drive it in warm weather so will wait awhile....
Reply

Get notified of new replies

To ac heater core





All times are GMT -4. The time now is 12:54 PM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE