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Old 10-06-2019, 10:24 AM
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ftwmlp ftwmlp is offline
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Join Date: May 2007
Location: Fort Worth, TX
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Quote:
Originally Posted by pilot737 View Post
I'm about to attempt to replace the heater core. Any advice is welcome.

Shop manual says remove glove box and disconnect control cables.
Remove six nuts from heater assembly.

Also says may not be able to access one of the nuts without cutting a hole in fender skirt... but someone mention before that shouldn't be necessary.

Anyone with experience of this remove/replace please offer help.

Reason for change is previous owner capped off core so I suspect it leaks. I asked him and he said "no" but he lied about other things so I don't trust him.
I hope others with more knowledge will contribute to this thread, there at least a couple of others I recall that address this topic. My personal experience with a 66 GTO was the outboard nut (above the inner fender skirt) could not be reached with any combination of socket extension/body contortion that I came up with. Rather than cut a whole I chose to remove the fender completely. Others have reported they were successful without doing either the hole or fender removal.
Good Luck.
Mike Pearson

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Fort Worth/Dallas TX area
1966 GTO Fontaine Blue
389 CID Carter AFB
Muncie 4 speed (orginally an automatic car)