Not Happy---Damn Heater Core!!!! - Team Camaro Tech
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post #1 of 21 (permalink) Old Oct 20th, 14, 05:11 PM Thread Starter
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Not Happy---Damn Heater Core!!!!

Took the Camaro for a little spin today, got back and smelled antifreeze and there it was leaking from the heater core all over the inside of my car!!!! I know what I am doing on Tuesday, glad I have the week off, lol

1967 camaro, 327, 9.7 CR, comp cam xs274solid, vortec cylinder heads, edelbrock vortec performer rpm, 750 annular carb, HVH 2" spacer, msd pro billet w/6A box, turbo 350 trans, 3500 stall, 4:10 gears, caltracs suspension, m/t drag radials.
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post #2 of 21 (permalink) Old Oct 20th, 14, 08:59 PM
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Re: Not Happy---Damn Heater Core!!!!

Well at least you found out before the winter freeze set in. Grab a bag of playground sand at Homedepot to soak up any antifreeze on the floor/toeboards then sweep it up with a wisk broom into a brownpaper bag, seal it up and throw it out in the trash, the sand should meet the requirements for safe disposal without the cost of speedy-dry.

Rug is another situation all together. If you have a little green machine you can quick wash it out but if its been there a while it may discolor lighter carpet and turn black carpet a purple hue. Depends on the antifreeze color and strength.

Hope it is an easy swap for you and there are no surprises in your core waiting for you to uncover.


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post #3 of 21 (permalink) Old Oct 20th, 14, 09:18 PM Thread Starter
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Re: Not Happy---Damn Heater Core!!!!

Heater core has been in there a while, done the BB conversion when it was installed, I had dynamat on the floorboard and it has started to bubble from the antifreeze, there was a couple puddles of antifreeze and the black carpet got a little wet, but not bad.

1967 camaro, 327, 9.7 CR, comp cam xs274solid, vortec cylinder heads, edelbrock vortec performer rpm, 750 annular carb, HVH 2" spacer, msd pro billet w/6A box, turbo 350 trans, 3500 stall, 4:10 gears, caltracs suspension, m/t drag radials.
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post #4 of 21 (permalink) Old Oct 20th, 14, 09:34 PM
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Re: Not Happy---Damn Heater Core!!!!

So far so good.


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post #5 of 21 (permalink) Old Oct 21st, 14, 07:31 AM
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Re: Not Happy---Damn Heater Core!!!!

I had this happen a couple of seasons ago to my small block 69 right around this time of the year. I removed the heater core and was surprised to find it didn't look very old, certainly not the original. There were some labels on it that I used the info from to search and find it was a Canadian manufactured core. I placed it in a pail of water, blocked one connection tube and applied air pressure to the other and found the only problem was where the connection tubes were soldered to the tank, there was minimal solder there and definitely not enough to prevent a failure as had occurred.

I cleaned up the area around both connection tubes where they attach to the core tank and re-soldered both joints allowing a bit more solder to aid in there not being a repeat failure. Then I pressure tested it to way beyond the pressure level it would ever see in the vehicle and re-installed. Due to the challenge removing and installing the core it isn't a quick or easy job but it can be done. Just make sure you pressure test whatever core you are going to reinstall and make sure there are good strong solder joints between the connection tubes and the core tank. BTW, mine is still leak free, good luck with yours

69 Camaro Z/28 RS, original Azure Turquoise, M21 & 3.73 12-bolt posi. NOM 406ci, AFR 210 heads, Straub hyd. roller cam & Dynatech 1-3/4" > 1-7/8" headers, QuickFuel 750 Annular. Photos at:
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post #6 of 21 (permalink) Old Oct 21st, 14, 10:53 AM Thread Starter
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Re: Not Happy---Damn Heater Core!!!!

Got the heater core out, wasn't to bad, my 45 year old body doesn't bend in some places, lol Core is not leaking around the tubes, leaking around the bottom of core, called two radiator shops, they both said they cant be repaired better off to buy a new one.

1967 camaro, 327, 9.7 CR, comp cam xs274solid, vortec cylinder heads, edelbrock vortec performer rpm, 750 annular carb, HVH 2" spacer, msd pro billet w/6A box, turbo 350 trans, 3500 stall, 4:10 gears, caltracs suspension, m/t drag radials.
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post #7 of 21 (permalink) Old Oct 21st, 14, 11:08 AM
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Re: Not Happy---Damn Heater Core!!!!

Quote:
Originally Posted by rkmjbad67 View Post
Got the heater core out, wasn't to bad, my 45 year old body doesn't bend in some places, lol Core is not leaking around the tubes, leaking around the bottom of core, called two radiator shops, they both said they cant be repaired better off to buy a new one.
Try and find a quality replacement, do a search for the ones you want to avoid purchasing.

69 Camaro Z/28 RS, original Azure Turquoise, M21 & 3.73 12-bolt posi. NOM 406ci, AFR 210 heads, Straub hyd. roller cam & Dynatech 1-3/4" > 1-7/8" headers, QuickFuel 750 Annular. Photos at:
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post #8 of 21 (permalink) Old Oct 21st, 14, 12:53 PM
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Re: Not Happy---Damn Heater Core!!!!

Heartbeat city carries an excellent quality core line and may even be the manufacture since they own the surviving Harrison Radiator Division and the original heater cores were made by Harrison.

But if you are going over the counter at the parts places or on-line search here first as suggested as there was a really good post on core quality last year or so.


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post #9 of 21 (permalink) Old Oct 21st, 14, 02:01 PM
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Re: Not Happy---Damn Heater Core!!!!

Quote:
found the only problem was where the connection tubes were soldered to the tank, there was minimal solder there and definitely not enough to prevent a failure as had occurred.
This leak occurs usually because when the new core is installed, the pipes dont always line up exact with the heater casing... and get tweaked slightly.. thats all it takes.. and/ or again get bent putting the heater hoses on......and this may occur several weeks to yrs after install...
So when installing line up the pipes and hoses, if they need any realignment, do so, pull out and re heat/ solder those stressed solder joints.
I pull those original pipes out and solder in in new longer pipes, line up, resolder if need be.
The slightly longer pipes allow far easier fitting of hoses and jubilee clips, and best access is from under the car
I now have high pressure plumber compression 90 deg (or 45 deg, cant rem so long ago) fittings on the end of my hoses rather than slide on hose/ jubilee clips

My Spelling is not incorrect...it is creative

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post #10 of 21 (permalink) Old Oct 21st, 14, 03:39 PM
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Re: Not Happy---Damn Heater Core!!!!

Well mine had a slow drip coming though the bottom rivet on heater box,I took it out and it was a Harrison{ I replaced it back in 78 and replacement back then was original Harrison from parts store}.Looked OK so I pressure tested it in a bucket of water at 5lb 10lb 40lb and not one bubble. I did this many times.I looked at the old hoses I took off and came to the conclusion it must have been leaking past the hose clamp and dripping down the heater box though the firewall.Put back in,silicone around tubes on firewall just in case to make sure.Put back together and guess what...SAME STINKING LEAK...O'Reilly part number 399086 is a good replacement for small block. It is 2in thick where as part 399063 is 2.5 in thick.My Harrison was 2in thick.I just love doing things twice;it's easier the second time.

Last edited by Stainless dog; Oct 21st, 14 at 03:41 PM. Reason: correct spelling
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post #11 of 21 (permalink) Old Oct 21st, 14, 04:44 PM Thread Starter
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Re: Not Happy---Damn Heater Core!!!!

checked the local o reillys, they have a BB core for 41.99, my dad says leave the heater assembly out, you don't drive it in the winter anyway!!! He is all about losing weight and going faster, he is 71, lol

1967 camaro, 327, 9.7 CR, comp cam xs274solid, vortec cylinder heads, edelbrock vortec performer rpm, 750 annular carb, HVH 2" spacer, msd pro billet w/6A box, turbo 350 trans, 3500 stall, 4:10 gears, caltracs suspension, m/t drag radials.
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post #12 of 21 (permalink) Old Oct 21st, 14, 05:37 PM
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Re: Not Happy---Damn Heater Core!!!!

for the ones out there that have no idea how to change a heater core and because you need to change yours, you should make a video on it while you change it, just an idea
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post #13 of 21 (permalink) Old Oct 21st, 14, 05:52 PM
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Re: Not Happy---Damn Heater Core!!!!

Quote:
Originally Posted by rkmjbad67 View Post
checked the local o reillys, they have a BB core for 41.99, my dad says leave the heater assembly out, you don't drive it in the winter anyway!!! He is all about losing weight and going faster, he is 71, lol
I would leave it out especially if you plan to add AC in the future. The new AC systems don't use the stock heater core.

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post #14 of 21 (permalink) Old Oct 24th, 14, 08:49 PM Thread Starter
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Re: Not Happy---Damn Heater Core!!!!

Got a heater core from Autozone, the box looked like hell, opened it up and both tubes are bent to the right, doesn't even look like they were soldered and the bottom corner was smashed where the fins are, got another one coming, It better be good, or I will get my money back!!!!

1967 camaro, 327, 9.7 CR, comp cam xs274solid, vortec cylinder heads, edelbrock vortec performer rpm, 750 annular carb, HVH 2" spacer, msd pro billet w/6A box, turbo 350 trans, 3500 stall, 4:10 gears, caltracs suspension, m/t drag radials.
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post #15 of 21 (permalink) Old Oct 25th, 14, 01:06 AM
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Re: Not Happy---Damn Heater Core!!!!

I'm amazed at the stories of bad customer service and or lack of quality assurance big box auto parts stores have these days. I know now I sound like a geeeezzzzer with a capitol G, but really did the parts receiver put down their cell phone long enough while unloading the shipments to actually hold the damaged box in both hands and think maybe I should open it up and inspect it before we call the guy all the way down here to pick it up?


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