1966 chevelle heater core replacement - Chevelle Tech
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Heating & Cooling Heating, cooling and air conditioning

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  #1  
Old Nov 26th, 11, 4:47 PM
jrockjr26 jrockjr26 is offline
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Default 1966 chevelle heater core replacement

I have a 66 chevelle SS convert. I need to replace my heater core. I was wondering if anyone had any helpfull hints or suggestions on the easiest way to do this? i never did a heater core before and im a little hestitant if I should do it myself or have a professional mech. do it. Also do i need to purchase a gasket kit? ANY FEEDBACK WOULD HELP, THANK YOU.
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  #2  
Old Nov 26th, 11, 5:31 PM
Tan66Elkie Tan66Elkie is offline
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Default Re: 1966 chevelle heater core replacement

Having just done this job this last summer, I can give you some of my thoughts. First, it helps to be a bit of a contortionist, as you have to do some of it from inside the car and some of it from under the hood. By all means, get a new gasket/seal kit for the heater...You won't want to do this job again for a long while and if the heater has never been rebuilt, the gaskets will be dry, brittle and in need of replacement. Also, plan on taking out the glove box door and liner...this will help provide access on the inside part. You will also need to remove the fender well/liner on the passenger side to get access to some of the case bolts. No real magic to it, just a PITA to get to some of screws and bolts. If all this scares ya...pay someone to do it for ya. One more thing, if you want to postpone the job for a while, go to NAPA and get a coupler for the two different size hoses, and bypass the core....no heat...but no leaks in the car either.
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Old Nov 27th, 11, 9:09 PM
jrockjr26 jrockjr26 is offline
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Default Re: 1966 chevelle heater core replacement

Ok, I got the heater core out. Now I have one more question, Should i replace the blower motor and the cage wheel ?
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Old Nov 27th, 11, 9:30 PM
MalibuSeaS MalibuSeaS is offline
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Default Re: 1966 chevelle heater core replacement

Quote:
Originally Posted by Tan66Elkie View Post
... just a PITA ...


Quote:
Originally Posted by jrockjr26 View Post
Ok, I got the heater core out. Now I have one more question, Should i replace the blower motor and the cage wheel ?
I have 2- '65s and they both have the original parts mentioned, so as long as the blower spins freely and it works OK, I wouldn't change it.
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  #5  
Old Dec 3rd, 11, 4:21 PM
james a larson james a larson is offline
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Default Re: 1966 chevelle heater core replacement

I would keep the blower and metal cage. I think they only make plastic replacements. I also had my original harrison heater core fixed.
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Old Dec 11th, 11, 5:27 PM
jrockjr26 jrockjr26 is offline
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Default Re: 1966 chevelle heater core replacement

UPDATE on heater core replacement, I have one final question and then i think im done. The lower heater core pipe is real close to my valve cover, can i cut the pipe ? or is there some kind of 45/90 degree angle adapter i can buy ?
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  #7  
Old Dec 11th, 11, 6:53 PM
JAYARTER JAYARTER is offline
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Default Re: 1966 chevelle heater core replacement

I wouldn't cut the pipe, I used a heater hose with 90 degree end on it to get hose away from engine. If blower motor isan't a PITA to change, leave it alone., J
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Old Dec 26th, 11, 6:22 PM
rkd rkd is offline
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Default Re: 1966 chevelle heater core replacement

The heater on a non ac 66 is pretty easy, (compared to the last three I have done in Fox Mustangs).

I removed the inner fender and did not have the glove box installed at the time. It has to be removed.

Otherwise it was straightforward. I had planned ahead and had a repro heater box gasket set on hand, but it seems that some body seam sealer could be used. Still not sure if the floor insulation pad goes between the inside box and the firewall. Mine was roached so its missing in that area. I had also rehabbed the heater switch and cables, and figured out how they installed.

Took about six hours. I did have a new inside box cleaned and painted, ready to go.
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Chevelle Tech > Mechanical > Heating & Cooling      Current Topic: 1966 chevelle heater core replacement
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