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Old Aug 30, 2005 | 12:35 PM
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Default Heater core replacement

OMFG! Whomever designed the heater core system and or the thought process to build a car around a heater core must have been out of their mind. This is the second Vette I have replaced a heater core in. The 77 was much worse but this still sucks. It took 2 hours just to get this far. I have a new core/ gaskets/ doors/ expansion tank ready to go in.






Last edited by Cali,68,L-79; Aug 30, 2005 at 05:28 PM.
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Old Aug 30, 2005 | 05:27 PM
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Old Aug 30, 2005 | 05:32 PM
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Just be glad it isn't an A/C car.
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Old Aug 30, 2005 | 05:35 PM
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Originally Posted by big_G
Just be glad it isn't an A/C car.
The 77 was an A/C car. If the 68 was i'd keep the heater core permanently bypassed and just wear a coat if it ever got cold (cold in San Diego is < 70 degrees).

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Old Aug 30, 2005 | 05:43 PM
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on my 75 (4 speed no AC) I replaced it on the engine side of the firewall...took about 1hr.
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Old Aug 30, 2005 | 05:52 PM
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Originally Posted by flood
on my 75 (4 speed no AC) I replaced it on the engine side of the firewall...took about 1hr.
same on my 73
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Old Aug 30, 2005 | 11:16 PM
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Yeah one hour unless your replacing all the door seals and cleaning up all the inner outer heater core boxes.
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Old Aug 30, 2005 | 11:27 PM
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Why do you need a heater core in Cali?? Come on!!!

Les

What's up David?
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Old Aug 31, 2005 | 12:36 AM
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Not sure if you noticed, or not (apparently no one else did)...there seems to be a small dog stuck in your vent system. Try removing the dog first before attempting further repairs...

Originally Posted by Cali,68,L-79
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Old Aug 31, 2005 | 08:50 AM
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I agree it is a PITA but I have had to replace heater cores in various other vehicles. and they were all different however all still a PITA.
It will be nice when you are done.
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Old Aug 31, 2005 | 10:13 AM
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Originally Posted by TonySinclair
Not sure if you noticed, or not (apparently no one else did)...there seems to be a small dog stuck in your vent system. Try removing the dog first before attempting further repairs...
Actually, I was thinking that the dog has the same expresion on its face that my wife gets when I talk about repairs.
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Old Aug 31, 2005 | 01:52 PM
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On f#$% day two and the boxes are all sanded down and ready for paint, all I have to do is clean-up the engine bay and interior and throw it together by friday and off I go.

I'm not sure how the dog got in the car but I was shooting the engine bay and saw Chief's face and thought it was cute.....
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Old Aug 31, 2005 | 03:34 PM
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Originally Posted by TonySinclair
Not sure if you noticed, or not (apparently no one else did)...there seems to be a small dog stuck in your vent system. Try removing the dog first before attempting further repairs...
Your car is a real DOG
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Old Aug 31, 2005 | 03:43 PM
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After replacing all the heater box seals, you should notice a cooler interior. While you are down there, take a look at the astro vent doors behind the kick panels, those seals are a major source of interior heat. Just make sure the dog is out before sealing it up.
BTW, nice car!
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Old Aug 31, 2005 | 09:37 PM
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Originally Posted by Red 69
After replacing all the heater box seals, you should notice a cooler interior. While you are down there, take a look at the astro vent doors behind the kick panels, those seals are a major source of interior heat. Just make sure the dog is out before sealing it up.
BTW, nice car!
Yeah, if the dog 'vents' it's definitely not fresh air!

Rick B.
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Old Sep 1, 2005 | 11:28 PM
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Been there-got the T shirt - Did not enjoy it, but felt like THE MAN when I finished !
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Old Sep 2, 2005 | 03:55 AM
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Default Expansion tank

David,

I see a new expansion tank in the box......do not lose the old one if you still have it, they are date coded and match the car.

Cheers,
Joe
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Old Sep 2, 2005 | 10:05 AM
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Having fun huh! LOL... Doing the same thing here but with (Air). Needless to say, the engine is out... I did replace the actuator on the Heater box aswell!!!! Well, tried to, the new one would not hold pressure on one side,and had to send it back!!!! Can u believe that!!!! ummm, Now I'm waiting on another one.... Don <~~~ tapping foot...
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Old Sep 2, 2005 | 05:09 PM
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I just got about 10 feet of buytl tape and\before I install everything I'm going to seal all the surfaces that GM didn't and hopefully get a really sealed system.
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Old Sep 4, 2005 | 12:28 AM
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Just got done. Five days later.
All new butyl seals plus I doubled up the butyl tape on all connections to the inner heater box.

New expansion tank


It took 4 hours to get the guages and sterio in. Whomever designed the 2 bolts that come off the bottom of the guage clutster and bolt down to the center shifter console should also be shot, there is absolutely no way to get access to them unless you have a lillipution living with you.

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