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Old 10-29-2014, 06:15 PM   #1
BADPURPLE70CHEVY
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Heater core change after 44 years

Heater core started leaking on my c10 so I tackled it. I was amazed at how many leaves and trash I ran into.
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Old 10-29-2014, 08:15 PM   #2
k_n_browning
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Re: Heater core change after 44 years

Did you mesure the new core?I The one I got yesterday was about 1/2 to small.It did not cover the hole in the housing.Part man check it with the book and its a no go for size.
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Old 10-29-2014, 08:17 PM   #3
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Re: Heater core change after 44 years

Mine worked perfect
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Old 10-29-2014, 08:30 PM   #4
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Re: Heater core change after 44 years

I had to shim the one I got from LMC, it too was too thin. If I had it to do over again I would have had my original factory Harrison unit resoldered.
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Old 10-29-2014, 08:54 PM   #5
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Re: Heater core change after 44 years

I still have the original I will probably fix.
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Old 10-29-2014, 09:04 PM   #6
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Re: Heater core change after 44 years

Quote:
Originally Posted by BADPURPLE70CHEVY View Post
Heater core started leaking on my c10 so I tackled it. I was amazed at how many leaves and trash I ran into.
So, the evaporator core probably has a compost pile in it too LOL
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Old 10-29-2014, 09:07 PM   #7
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Re: Heater core change after 44 years

I've been waiting for mine to go on my '67 GMC...since I bought it about 1 1/2 years ago I've had to replace the radiator and the water pump...I figure the heater core is next...so I bought a quick fix that will get me home in case it happens, which will allow me to connect the heater hoses together - I keep the fix in my glovebox:
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Old 10-29-2014, 10:26 PM   #8
k_n_browning
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Re: Heater core change after 44 years

I cleaned mine out with some hard water remover.Presure it up and no leaks put it back in gets hot now.
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Old 10-30-2014, 12:09 AM   #9
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Re: Heater core change after 44 years

Mice love to crawl in them through the firewall hole. I put some metal window screen in there to keep them and leaves/debris out. I ordered a new core through rock auto and it was high quality and just like Oem as far as I could tell. Now that its all clean and with the AC motor upgrade, it will blow objects off the dash when the defrosters are on!
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Old 10-30-2014, 12:58 AM   #10
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Re: Heater core change after 44 years

I like the idea of the "in case it goes fix." I probably need to carry a set of clamps and the proper size connector too.

I'll have a look at mine when I'm ready to put the new radiator in.
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Old 10-30-2014, 07:30 AM   #11
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Re: Heater core change after 44 years

BAdpurple-Would you post where you got yours and possibly the part number?
I know there has been a lot of talk about them not fitting and you said yours fit perfect.

Thanks!
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Old 10-30-2014, 08:59 AM   #12
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Re: Heater core change after 44 years

Funny, I'm doing my heater core right now too and the junk I pulled out looked just like this but was worse.....it's also all down behind the blower motor and into the fender well. I opened the fresh air kick panel vent for the passenger side and stuck a skinny hose from my shop vac down in there....it was crazy how much junk had accumulated!

I'll have to post pics!!
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Old 10-30-2014, 10:18 AM   #13
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Re: Heater core change after 44 years

Quote:
Originally Posted by BigBlockBurris View Post
BAdpurple-Would you post where you got yours and possibly the part number?
I know there has been a lot of talk about them not fitting and you said yours fit perfect.

Thanks!
BBB
I will get back to the garage soon and get you the part number.
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