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1/31/09 10:04am - Original Message: 'I love the smell of antifreeze...'
T-Mans70,73 Lifetime Member
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Elma, WA - USA

Vette(s):
Red 1973 Convertible. L-48 Auto #'s matching Red 1970 LT-1 Convertible #'s matching

Joined: 6/25/2007
Posts: 692
So I take my 1st passenger in the 70.
Just a quick run into town in the dark. Now before I kinda, thought that maybe, just a little I could smell antifreeze in the corkpit but the head gaskets  seep just ever so slightly so I just "overlooked" it.

Getting on the freeway we take off like a rocket. I slam that LT-1 into 2 gear and we are going over 60. Lovin it.

Then it gets ugly. Big smell of antifreeze. Window fogs up to the point I can barley see. Even wiping the window every 30 seconds with the defrost off and the windows down we are almost driving blind. My friend Matt has antifreeze all over his foot. (Man I am glad it wasnt the wife!).I know its the heater core.

Now for the questions.
How hard is it to get up in there to replace that bad boy?

If I decide to have it done at a shop can I take the hose running from the water pump and put it to the motor so I am by- passing the heater core and not filling the corkpit with more fluid?
 
One should not overlook the ever so slight smell of antifreeze.
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1/31/09 10:15am - Reply: 'I love the smell of antifreeze...'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
Yes, you can bypass the core. I have never replaced one myself but have read posts from several members who have done it. If it is an A/C car it is certainly more difficult. It appears one needs a truck load of patience to accomplish the repair.

Scott


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1/31/09 10:23am - Reply: 'I love the smell of antifreeze...'
RADARB8 Lifetime Member
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Montesano, WA - USA

Vette(s):
had a really nice one. sold it to a good friend. Purchased 2004 custom coupe in Feb. 2009 did not tell anyone here until August 2009. BAD I KNOW.

Joined: 9/27/2003
Posts: 1931
oh my gosh john you are making me feel bad and look bad too, I am so sorry to hear about the heater core, I never, honestly,  had any signs of it being in need of repair.  Please let me know tje cost of the new battery so I can refund you that and let me know about the heater as well maybe I can slip you an extra hundred to help out. lets talk some time late next week.
Larry


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Okay its not a C3 but it is cool as hell.....
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1/31/09 11:42am - Reply: 'I love the smell of antifreeze...'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
Replacing a heater core is a bit of a pain, but only because yuo need to twist and reach in odd ways.  Most books tell you  that you need to remove the inside heater box, but I never do.  Just remove the under hood box, push the inner box in far enough to let you get at the bolts holding the core in place, and wiggle and jiggle until you get it out.  Jiggle in the opposite direction to reassemble.

And of course Scott was right about bypassing or plugging the heater hoses.  An emergency fix is to clamp a vice grip over each hose, squeezing it shut.

And remember, no matter what problems you might have, it is still a red LT1 Corvette.

Larry


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1/31/09 12:55pm - Reply: 'I love the smell of antifreeze...'
T-Mans70,73 Lifetime Member
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Elma, WA - USA

Vette(s):
Red 1973 Convertible. L-48 Auto #'s matching Red 1970 LT-1 Convertible #'s matching

Joined: 6/25/2007
Posts: 692
See I didnt know you could get to it from the engine side. I'll take a look at that but this maybe one of them deals I dont fix myself.

Too often I break other things while at the same time fixing things.

Now Larry, do I think for a second that you decided to sell the car because the heater core was about to let go? No I dont.

It does explain that whiff of steam that came out the defrost during the test drive.
I dont hold you responsible for the things that go wrong. But I will also leave it up to you as to your comfort level. I aint trying to make ya look bad, I just need advice as to how hard a job this is and where to go from here.


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2/25/09 8:20pm - Reply: 'I love the smell of antifreeze...'
JimmyV69 Lifetime Member
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Charlotte, NC - USA

Vette(s):
1969 Custom Modified, Hooker Header Side Pipes, 12 to 1 compression ratio, 355 CID,4 speed close ratio with hurst shifter, 370 rear, Recaro interior, Tilt hood, Hugger Orange and Black.

Joined: 2/4/2008
Posts: 83
You will have full access once you pull the passenger side dash panel and the center dash section loose, assuming you do not have A/C. Once my 69 sprung a leak and had it apart and found that the local auto parts store no longer have acces to the cores for a 69 non - A/C car - only Ecklers and Mid America to my research and based on their prices I decided to splurge and bought the Vintage Air setup instead. Now I have heat and A/C plus a flat fire wall - no more bulge - makes getting at that last header bolt a lot easier 

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2/26/09 1:27am - Reply: 'I love the smell of antifreeze...'
Norsky Lifetime Member
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Twin Lakes, CO - USA

Vette(s):
SOLD - "The Toy" - 1970 Convertible
SOLD - "The Beast" - 1990 ZR-1 (#682)
"BLKBRRD" - 1978 Trans Am, 400ci/285hp, 4 spd, Black w/black interior, Hurst t-tops

Joined: 1/23/2002
Posts: 6712
Check out this thread (Replacing Heater Core).  It's an oldie but a goodie!  In it is a reply from Juliet where she included a link to some pictures she took of the task.

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2/26/09 4:43pm - Reply: 'I love the smell of antifreeze...'
Aaron1976
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Vancouver, WA - USA

Vette(s):
1976 Corvette Stingray L-48 Automatic Black

Joined: 11/17/2007
Posts: 830
Hay John, Zip & Corvette Magazine have alot of Tech articles online for that kind of repair & more. www.corvettemagazine.com Down on the right under POPULAR ARTICLES "Heater Core and Box Rebuild" that should help you.Aaron19762009-02-26 13:47:01

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Aaron

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2/26/09 8:34pm - Reply: 'I love the smell of antifreeze...'
PP52
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Newland, NC - USA

Vette(s):
1. 75 coupe 383 stroker, trick flow heads, eldebrock performer intake, roller rockers, cam, and780 hollery. 2. 05 Coupe w/Z51 options

Joined: 11/18/2008
Posts: 19
Funny thing... my 75 heater core is out.  I have factory air.. I am in the process of replacing all with Vintage Air.  It has been a task so far.  I would have farmed this job out if I knew what I know now.  I was also in the process of pulling the speedo and tach when I discovered the leak on the heater core box .  So now I have the whole dash out once again.. lesson learned I should have replaced it all when I was restoring the car.  But as the story goes money was tight now I back doing what I should of done to start.  Have fun.
 
Phil


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2/26/09 9:22pm - Reply: 'I love the smell of antifreeze...'
T-Mans70,73 Lifetime Member
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Elma, WA - USA

Vette(s):
Red 1973 Convertible. L-48 Auto #'s matching Red 1970 LT-1 Convertible #'s matching

Joined: 6/25/2007
Posts: 692
Phil sorry to hear that.
I did farm out the heater core as with my skills I most likely would do more damage than good.
They wanted to have the original recored instead of a replacement. I guess the holes all line up kind of deal.

I am glad to hear you caught the leak BEFORE the passenger in your Vette got his feet full of antifreeze.

Good luck!
jt's732009-02-26 18:24:11

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3/19/09 4:10pm - Reply: 'I love the smell of antifreeze...'
manchestershark Lifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1895
I am familiar with your dilema. My passenger was the wife, and she did not like the HOT WATER. The core has been replaced, not to bad. BUT I am still trying to get the anti-freeze out of the carpet. That stuff NEVER dries. Idid the vise grip fix till the core came out.

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3/19/09 6:04pm - Reply: 'I love the smell of antifreeze...'
streetstock72
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, - Canada

Vette(s):
my wife had her 1979 Corvette since new,it was a demostration model on the lot she bought it from so it had 5000 KMS already.It it that very light blue with a L48 Auto

Joined: 1/25/2009
Posts: 13
Just a side note to this heater core thread,when I read that the former owner was concerned to the present owner and offered help in that department about the heater core I thought "Yes" this really is a good group to belong to.....I also belong to a Hotrod group that started in BC called the FlatBlackboard forum (mainly rat rodders ) and this happens all the time were some one needs a part and someone 250 miles away has it and then some one speaks up and is passing through that town picks it up for the other person and drops it off....with no money involved! This Saturday I have to go
  250 miles away to a race club meeting in Vernon BC(stock car racing) and I am taking up a 27T rad and shell to a fellow in Enderby BC about 20 miles north of the town I'm going to.I am also picking up two free 70 Chevy 1/2T grills for my stock car for free from this same small town and on my way back I pick up a 77 Chevy Van grill and front bumper from Kamloops BC for 2 different guys down here on the coast...All this stuff is done through this group for nothing but conversation on ones passion "there auto toy"Just thought I would bring this up here since I noticed it from these 2 Washington states guys to my south....is it just a west coast thing???
streetstock722009-03-19 15:05:04

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3/19/09 7:14pm - Reply: 'I love the smell of antifreeze...'
KeBo
Former Member
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Kendall Park, NJ - USA

Vette(s):
1981 - 59 Beige over Cinnebar leather. Edlebrock top end, 2200 stall w/shift kit, 3:55s, Mufflex maniback exhaust, nice stereo, 16 in AREs w/BFGs

Joined: 3/9/2005
Posts: 789
WOW - Deja Vu!  About 2 years ago im smelling maple syryp. Im wondering why am I smelling maple or butterscotch for 20 minutes...  Then ka-splash. Heater core!  I just jumped it in the engine bay. I never use the heat anyway..  I know theres a right way and a wrong way to jump it. I got the directions off of here actually.
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3/19/09 9:48pm - Reply: 'I love the smell of antifreeze...'
T-Mans70,73 Lifetime Member
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Elma, WA - USA

Vette(s):
Red 1973 Convertible. L-48 Auto #'s matching Red 1970 LT-1 Convertible #'s matching

Joined: 6/25/2007
Posts: 692
Paul, I would like to think its not just a Northwest or even a west coast deal.

I'd like to think thats just how friends work with friends who have a common interest.

Now for "The rest of the story".

I never took Larry up on his offer as I bought a used car and thats the way it goes. I know he had no idea that it was about to go.

I still havent got the car back but should have that bad boy back in my hands within the week.

I can see it now, 2nd gear, 5000rpm, 60mph, slam it into 3rd and NO ANTIFREEZE!

How cool will that be?Clap


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Anything worth doing is worth overdoing
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