Heater Core Probs... Again!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79Betty · 01-20-2013, 10:06 PM

Hey guys just me again... Ha. On betty (my 79 k10) the heater core started leakin. Well i replaced it with one from the parts store n the little tabs/ bolts on the top n side broke which where my problems began. i got a different box n well the heat isn't hot and it has all good tabs... It's Not rven warm. I ended up running hoses from the intake to water pump hopen to get hot water and it still didn't nothin. I'm to the stumped point anymore.
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INSIDIOUS '86 · 01-20-2013, 10:17 PM

Was this new core alujerbin? Or copper? You want the flow to go from the bottom to the top so it blows out any air bubbles. Is your truck a/c equipped or once was?
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79Betty · 01-20-2013, 10:41 PM

Aluminm core, and non ac... Kinda sucks a/c cab parts are a lot more common round here
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INSIDIOUS '86 · 01-20-2013, 10:53 PM

Ok aluminum heater cores are real bad they conduct heat horribly. You need a quality copper style one. That may be part if the issue
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79Betty · 01-20-2013, 11:18 PM

Ill head to the oarts store morrow then... Hooe this solves it the high is 29 degrees tomorrow n lookin like the rest of the week.
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INSIDIOUS '86 · 01-20-2013, 11:26 PM

Yah so after this make sure the water exits the top and make sure the engine is fully warm. Also make sure the blower is working
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86c20 · 01-20-2013, 11:30 PM

,ake sure your heater lines are right from motor and back. water pump is sucktoin intack is pressore

79Betty · 01-21-2013, 07:17 AM

I'll hook em up like that too hope it all adds up to somethin workin!
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79Betty · 01-22-2013, 07:23 AM

Little insight. Can't buy a copper core, no surprise there. I put a 195 thermostat in it hopin to get it hotter, no change... Routed my hoses the 3/4 from intake to top 5/8 from bottom to pump. Still nothin.
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motornut · 01-22-2013, 09:59 AM

what is your anti freeze rated too
were getting -29C this week here ...sure your not icing up?

79Betty · 01-22-2013, 10:01 AM

It's a 50/50 mix of o'reilly green stuff. One gLlon full one gallon water then top off half/half pre-mix. Says -40c to i think 250? Not for sure.
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motornut · 01-22-2013, 10:28 AM

Quote:

Originally Posted by 79Betty

It's a 50/50 mix of o'reilly green stuff. One gLlon full one gallon water then top off half/half pre-mix. Says -40c to i think 250? Not for sure.
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i'd get the tester to confirm,too much/too little anti freeze would get slushy,or worse

79Betty · 01-22-2013, 04:01 PM

It's tested good about 60/40 honestly i flush it twice a year.
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motornut · 01-22-2013, 04:48 PM

lol don't need to be honest with me,just your truck
twice a year?...why

tucsonjwt · 01-22-2013, 05:47 PM

Go with copper. You can order AC Delco or GM OEM online at cheap prices and free shipping.
Make sure you have the correct thermostat in your truck and that it is opening, not stuck shut.

79Betty · 01-22-2013, 06:05 PM

I just put a 195 in it last night literally lol. And i'll look tonight for a copper ine
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01-20-2013, 10:06 PM	#1
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Heater Core Probs... Again!! Hey guys just me again... Ha. On betty (my 79 k10) the heater core started leakin. Well i replaced it with one from the parts store n the little tabs/ bolts on the top n side broke which where my problems began. i got a different box n well the heat isn't hot and it has all good tabs... It's Not rven warm. I ended up running hoses from the intake to water pump hopen to get hot water and it still didn't nothin. I'm to the stumped point anymore. Posted via Mobile Device Posted via Mobile Device

01-20-2013, 10:17 PM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Heater Core Probs... Again!! Was this new core alujerbin? Or copper? You want the flow to go from the bottom to the top so it blows out any air bubbles. Is your truck a/c equipped or once was? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

01-20-2013, 10:41 PM	#3
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! Aluminm core, and non ac... Kinda sucks a/c cab parts are a lot more common round here Posted via Mobile Device

01-20-2013, 10:53 PM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Heater Core Probs... Again!! Ok aluminum heater cores are real bad they conduct heat horribly. You need a quality copper style one. That may be part if the issue Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

01-20-2013, 11:18 PM	#5
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! Ill head to the oarts store morrow then... Hooe this solves it the high is 29 degrees tomorrow n lookin like the rest of the week. Posted via Mobile Device

01-20-2013, 11:26 PM	#6
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Heater Core Probs... Again!! Yah so after this make sure the water exits the top and make sure the engine is fully warm. Also make sure the blower is working Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

01-20-2013, 11:30 PM	#7
86c20 Registered User Join Date: Mar 2012 Location: edgartown mass Posts: 852	Re: Heater Core Probs... Again!! ,ake sure your heater lines are right from motor and back. water pump is sucktoin intack is pressore __________________ 1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car

01-21-2013, 07:17 AM	#8
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! I'll hook em up like that too hope it all adds up to somethin workin! Posted via Mobile Device

01-22-2013, 07:23 AM	#9
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! Little insight. Can't buy a copper core, no surprise there. I put a 195 thermostat in it hopin to get it hotter, no change... Routed my hoses the 3/4 from intake to top 5/8 from bottom to pump. Still nothin. Posted via Mobile Device

01-22-2013, 09:59 AM	#10
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Heater Core Probs... Again!! what is your anti freeze rated too were getting -29C this week here ...sure your not icing up? __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

01-22-2013, 10:01 AM	#11
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! It's a 50/50 mix of o'reilly green stuff. One gLlon full one gallon water then top off half/half pre-mix. Says -40c to i think 250? Not for sure. Posted via Mobile Device

01-22-2013, 04:01 PM	#13
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! It's tested good about 60/40 honestly i flush it twice a year. Posted via Mobile Device

01-22-2013, 04:48 PM	#14
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Heater Core Probs... Again!! lol don't need to be honest with me,just your truck twice a year?...why __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

01-22-2013, 05:47 PM	#15
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Heater Core Probs... Again!! Go with copper. You can order AC Delco or GM OEM online at cheap prices and free shipping. Make sure you have the correct thermostat in your truck and that it is opening, not stuck shut.

01-22-2013, 06:05 PM	#16
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Heater Core Probs... Again!! I just put a 195 in it last night literally lol. And i'll look tonight for a copper ine Posted via Mobile Device



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