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10-29-2014, 06:15 PM
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#1 |
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406 Powered
Join Date: Aug 2009
Location: waynesville,n.c.
Posts: 877
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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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70 GMC 68 c10 2002 silverado 72 4x4 |
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10-29-2014, 08:15 PM
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#2 |
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Registered User
Join Date: Sep 2011
Location: McAlester Olahoma
Posts: 114
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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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10-29-2014, 08:17 PM
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#3 |
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406 Powered
Join Date: Aug 2009
Location: waynesville,n.c.
Posts: 877
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Re: Heater core change after 44 years
Mine worked perfect
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70 GMC 68 c10 2002 silverado 72 4x4 |
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10-29-2014, 08:30 PM
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#4 |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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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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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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10-29-2014, 08:54 PM
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#5 |
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406 Powered
Join Date: Aug 2009
Location: waynesville,n.c.
Posts: 877
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Re: Heater core change after 44 years
I still have the original I will probably fix.
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70 GMC 68 c10 2002 silverado 72 4x4 |
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10-29-2014, 09:04 PM
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#6 | |
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Registered User
Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
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Re: Heater core change after 44 years
Quote:
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10-29-2014, 09:07 PM
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#7 |
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Senior Member
 
Join Date: Apr 2013
Location: Podunk, Texas
Posts: 744
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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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10-29-2014, 10:26 PM
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#8 |
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Registered User
Join Date: Sep 2011
Location: McAlester Olahoma
Posts: 114
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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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10-30-2014, 12:09 AM
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#9 |
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Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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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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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore  )86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6 |
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10-30-2014, 12:58 AM
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#10 |
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Registered User
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
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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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10-30-2014, 07:30 AM
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#11 |
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Registered User
Join Date: Nov 2001
Location: Concord,NC,USA
Posts: 743
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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! BBB |
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10-30-2014, 08:59 AM
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#12 |
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Registered User
Join Date: Jun 2014
Location: Houston, Texas
Posts: 722
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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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1972 Chevrolet C20 Cheyenne Custom Camper LWB - 350 / 330 HP GM Crate - TH350 / Mild Shift Kit - Dark Blue / Medium Blue - Paint Code 559 |
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10-30-2014, 10:18 AM
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#13 | |
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406 Powered
Join Date: Aug 2009
Location: waynesville,n.c.
Posts: 877
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Re: Heater core change after 44 years
Quote:
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70 GMC 68 c10 2002 silverado 72 4x4 |
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