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Old 05-27-2012, 09:06 AM   #1
chevy4life02814
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Heater Core Help!

so it seems whoever owned the truck before me disconnected the heater core. i'm guessing it was leaking so i plan on pulling it out and replacing it. not so much of a rush right now being summer. just not sure how to reconnect the lines. included a few pics. any help would be appreciated. thanks again.
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Old 05-27-2012, 10:09 AM   #2
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Re: Heater Core Help!

It should be easy. I think one hose is bigger then the other one. Just hook them up.
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Old 05-27-2012, 10:11 AM   #3
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Re: Heater Core Help!

It's fairly easy, one line is 3/4 and one is 5/8. Just disconnect where the two hoses are joined and connect the 3/4in hose to the large port on the heater core then the 5/8in line to the smaller port.
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Old 05-27-2012, 10:16 AM   #4
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Re: Heater Core Help!

ditto,
On mine the larger goes from the HC to the rad (return)
smaller from the intake to the HC.
No pics on dial-up sorry.
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Old 05-27-2012, 10:37 AM   #5
84_chevy
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Re: Heater Core Help!

I have the same problem, my heater exploded last week. I'm just going to bypass it for now. Is there an adapter I can use to plug the 5/8 hose into the 3/4 hose, what is the best way to quick fix this for now. I'm working on other issues right now at since it 80 degrees outside the heater core gets low priority.
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Old 05-27-2012, 10:41 AM   #6
J Knight
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Re: Heater Core Help!

Quote:
Originally Posted by 84_chevy View Post
I have the same problem, my heater exploded last week. I'm just going to bypass it for now. Is there an adapter I can use to plug the 5/8 hose into the 3/4 hose, what is the best way to quick fix this for now. I'm working on other issues right now at since it 80 degrees outside the heater core gets low priority.
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You can get a plastic fitting at the parts store specifically to bypass the heater core or pick up some fittings at the hardware store.
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Old 05-27-2012, 01:55 PM   #7
tucsonjwt
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Re: Heater Core Help!

When you buy a replacement heater core be sure to get a copper core. I would even check out an OEM GM heater core on the online OEM vendors to see if their price is not much more than the aftermarket parts store price. I think the quality of aftermarket radiator and heater cores has gone down in recent years, even for copper parts.
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Old 05-27-2012, 02:03 PM   #8
chevy4life02814
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Re: Heater Core Help!

thanks for all the input. will take care of when i get the chance. other projects going on now. attempting my first center console build, we will see how that works out...
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