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Heater Core Failure

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Old Oct 9, 2012 | 01:09 PM
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From: Royse City Texas
Default Heater Core Failure

So it seems after owning my first Vette for 2 months the heater core has decided to kick the bucket. Tale-Tale Signs?
1) Orange Stickey Liquid under the passenger side of the car.
2) Soaked Passenger Carpet
3) Damp Drivers Carpet.
4) Pulled the carpet back by the BCM and saw liquid running down the inside of the foot well


I bypassed the heater core, that way testing if it was still leaking. I did take the BCM out immediately, open it up and make sure it was dry. I have checked the utters and the HVAC drain on the upper side of the firewall. I have not checked the 2 lowers.

Someone on here commented that they would recommend have the new heater core tested before it was installed. I figured why not use that idea to check the old one just to make sure. Pressure dropped rather quickly.



I have read pretty much every post in the forum about replacing the heater core. As per the repair manuel it seems a daunting task. I am not a total novice under the hood of a car but nervous of ripping out the entire dash of my C5. Still trying to decide if I'm up for the task. Are there any trustworthy Corvette mechanics in the Dallas area? just in case. Thanks and sorry for such a long post.
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Old Oct 9, 2012 | 01:51 PM
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there are a a lot of great people/shops in TX; Dallas Performance is right there, but I would think they stick to mostly performance builds, give them a call and see

I've never seen a heater core failure on the C5; I've pulled dozens of dashs and stripped out the HVAC from a few cars, looks fun
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Old Oct 10, 2012 | 12:33 PM
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Unless you have been around the block many times with this type of repair take it to a pro.
Not only are you going to remove the heater core but you will also have to remove the AC evap. core.
I replaced mine in my 98 this last winter, the service manual sucks but will give you a general idea.
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Old Oct 10, 2012 | 01:17 PM
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Originally Posted by Chanda's Vette
So it seems after owning my first Vette for 2 months the heater core has decided to kick the bucket. Tale-Tale Signs?
1) Orange Stickey Liquid under the passenger side of the car.
2) Soaked Passenger Carpet
3) Damp Drivers Carpet.
4) Pulled the carpet back by the BCM and saw liquid running down the inside of the foot well


I bypassed the heater core, that way testing if it was still leaking. I did take the BCM out immediately, open it up and make sure it was dry. I have checked the utters and the HVAC drain on the upper side of the firewall. I have not checked the 2 lowers.

Someone on here commented that they would recommend have the new heater core tested before it was installed. I figured why not use that idea to check the old one just to make sure. Pressure dropped rather quickly.



I have read pretty much every post in the forum about replacing the heater core. As per the repair manuel it seems a daunting task. I am not a total novice under the hood of a car but nervous of ripping out the entire dash of my C5. Still trying to decide if I'm up for the task. Are there any trustworthy Corvette mechanics in the Dallas area? just in case. Thanks and sorry for such a long post.
Haven't lived in the DFW area for over 7 years, but I had excellent service at Mid City Classics in Hurst.
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