07-21-2020, 09:17 PM
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#1 (permalink)
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Not Doug
Join Date: Jun 2012
Location: Show Low, AZ
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How to test a heater core [before installing]
- Flush your radiator.
- Disconnect the hoses to the heater core.
- Connect the heater core that you want to test.
- Fill the radiator with 100% water.
- Run the engine for a while and maybe drive around the block. Bleed the air out of the radiator the best that you can, but don't push too hard, you are not running the proper mix!
- Let everything cool down, disconnect the heater core, and replace if necessary. If for some reason you are testing in another car, reconnect the proper heater core, flush the radiator, and fill with the proper mix.
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"Oh if you use math, reason, and logic you will be hated."--OilPan4
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The Following 2 Users Say Thank You to Xist For This Useful Post:
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 Today
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07-22-2020, 02:44 PM
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#2 (permalink)
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Cyborg ECU
Join Date: Mar 2011
Location: Coastal Southern California
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Smart!
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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The Following User Says Thank You to California98Civic For This Useful Post:
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07-24-2020, 07:24 PM
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#3 (permalink)
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Not Doug
Join Date: Jun 2012
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Questionable Internet suggestion #13
"Just Gorilla-tape a garden hose to the heater core!"
I do not have any idea how to seal Gorilla tape around a hose and a smaller and oddly-shaped connection. I tried twice and failed twice, although the water leaked out of the tape, not the core.
So, I cut a piece of inner tube, which barely fit over the end of the hose. I used a hose clamp and then a zip tie, as before, over the heater core opening.
The tube burst, but the core seemed to hold. I am pretty sure that was the AutoZone one.
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"Oh if you use math, reason, and logic you will be hated."--OilPan4
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07-24-2020, 08:19 PM
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#4 (permalink)
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Corporate imperialist
Join Date: Jul 2011
Location: NewMexico (USA)
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Don't buy a used one.
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07-25-2020, 01:46 AM
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#5 (permalink)
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Not Doug
Join Date: Jun 2012
Location: Show Low, AZ
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Figure that out on your own, didja?
__________________
"Oh if you use math, reason, and logic you will be hated."--OilPan4
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07-25-2020, 07:26 AM
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#6 (permalink)
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Cyborg ECU
Join Date: Mar 2011
Location: Coastal Southern California
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Quote:
Originally Posted by Xist
Figure that out on your own, didja?
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Youe heater core threads are test/repair threads but so much more than JUST test/repair threads. ... This odyssey makes a legend, Xist: "Remember that year Xist was testing and repairing a heater core...?"
This inner tube pressure tester, with refinements, would belong in the "janky tools you made that worked" thread.
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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