C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old May 18, 2023 | 05:53 PM
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Default Heater core

How much do I need to remove to replace heater core,I’m doing my 80k interior upgrade,so already have all seats out,carpet and console and removing instrument panel and I’m assuming glove box,so will dash have to be removed to get heater core out,any special tools besides tiny hands. 😝
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Old May 18, 2023 | 06:24 PM
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No, the dash can remain in place. You just remove to the ducts and loosen the right lower corner of the dash just to give it a inch more clearance. Nothing special needed. It's not a bad job to do.
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Old May 18, 2023 | 06:36 PM
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Hi Golferdad, help us out with what year and a/c or no a/c and we'll provide better guidance. Thanks! Paul
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Old May 18, 2023 | 06:51 PM
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Originally Posted by Hopper12
Hi Golferdad, help us out with what year and a/c or no a/c and we'll provide better guidance. Thanks! Paul
I believe he has an 81 with A/C
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Old May 18, 2023 | 06:54 PM
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Originally Posted by Fly skids up!
I believe he has an 81 with A/C
Ahhh - thanks. In that case, I'll leave this one to you and others with later C3s and a/c. Appreciate it! Paul
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Old May 18, 2023 | 09:01 PM
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No special tools…but leak test it before installing including after bending the pipes to conform to bracket.
Lots threads on heater cores
for mea pretty tedious job and tight spaces with brittle plastic. Get the seal kit as well.
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Old May 18, 2023 | 09:25 PM
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I have posted on my profile several times,not sure why it doesn’t show up. It’s a 1981 with 80k original miles,and was stock about a year ago but since have E street aluminum heads,Edelbrock intake,AVS carburetor,and added a comp cam 262,and replaced oil pump,new bearings.and have a 200-4R transmission to replace the th350,and Monday should be receiving a new 3.54 differential to replace the original 2,87 gears.
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Old May 18, 2023 | 09:27 PM
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The body and paint are in great shape,I think it was painted within the last 20 years.

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Old May 18, 2023 | 09:30 PM
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Old May 18, 2023 | 10:02 PM
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You might want to put the valve cover on facing the correct way as you put it back on.
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