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02-26-2014, 01:19 PM
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#1 |
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Registered User
Join Date: Aug 2013
Location: San Diego, CA
Posts: 236
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New heater core...now no heat
The heater core exploded while my truck was in getting a new transmission. The shop told they would replace it free of charge while I was getting a new tranny installed. Living in So Cal it does not get used very often so I finally tried the heater this morning on my way n to work and I had it on high and I did not feel any warmth. Any ideas?
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1973 Chevy K20 |
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02-26-2014, 01:50 PM
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#2 |
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Don't Crush em Restore em
Join Date: Aug 2004
Location: Pinehurst, Texas
Posts: 764
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Re: New heater core...now no heat
Maybe they hooked up the hoses backwards?
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TexasJeff 2009 Silver with Linen Interior Cadillac DTS 1990 Red with White Top and Interior Ford Mustang GT convertible 1998 Red with Gray Interior, C3500 Chevy Crew Cab Dually     
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02-26-2014, 01:57 PM
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#3 | |
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Registered User
Join Date: Aug 2013
Location: San Diego, CA
Posts: 236
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Re: New heater core...now no heat
Quote:
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1973 Chevy K20 |
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02-26-2014, 02:37 PM
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#4 |
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Registered User
Join Date: Feb 2013
Location: Cary, NC
Posts: 816
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Re: New heater core...now no heat
Might have a bubble in the cooling system? I'd pop the cap off the radiator while it was cold and run it for a while until all the bubbles (if any) come out and then fill as necessary... Just a cheap way to rule things out.
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Austin 1996 Chevrolet K1500 Silverado  1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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02-26-2014, 05:20 PM
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#5 |
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Registered User
Join Date: Aug 2013
Location: San Diego, CA
Posts: 236
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Re: New heater core...now no heat
I'll give it a shot
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1973 Chevy K20 |
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02-26-2014, 05:23 PM
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#6 |
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Registered User
Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: New heater core...now no heat
They busted your flapper door and didn't fix it.
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02-26-2014, 05:23 PM
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#7 |
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Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
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Re: New heater core...now no heat
The most common causes are water level low and bad valve.
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I know a guy who's addicted to brake fluid. He says he can stop any time. 72 K10 396 75 Cj5 MPI 350 Chev 67 Chevelle 396, 4 speed 74 FXE 08 Tahoe |
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02-26-2014, 10:13 PM
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#8 |
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Registered User
Join Date: Sep 2009
Location: Placentia, California
Posts: 567
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Re: New heater core...now no heat
Bleed the heater hoses. Its kind of like bleeding the air out of brakes. Its been an awful long time since I bled a heater, but as I remember it you crack the top hose loose while its running and let it flow until there's a steady stream of water.
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02-27-2014, 10:05 AM
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#9 | |
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Registered User
Join Date: Sep 2009
Location: Placentia, California
Posts: 567
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Re: New heater core...now no heat
Quote:
Also, too low a thermostat will effect heater output. like a 160, or a 180 or none at all. |
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02-27-2014, 08:02 AM
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#10 |
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Registered User
Join Date: Jun 2003
Location: ga
Posts: 630
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Re: New heater core...now no heat
open your glovebox and look on top of the heater housing you can see the steel cable going to it make sure its not jumped off or work it back and forth the cable to see if its opening up and closeing correctly pretty simple way to check it
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4x4k30 if trouble was money i would have plenty |
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