Question about 2004 Kia Sorento

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Dan how do I bleed 2004 Kia coolant car temp is good but sometime at idle heater starts to blow cool hit throttle gets great heat

Replace. Timing belt water pump thermostat new coolant poor heat at idle hit throttle heat great on the hiway it is good How do you bleed Kia heater core? Car runs good Also the vac system for heat how does that work vac open heater door let hot water in or no vac let's water in because maybe vac leak just thinking maybe you have see this before

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  • Kia Master
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Sounds like a blockage or air lock in the cooling system! To bleed from cold, undo the expansion cap, select all heater controls inside to hot, start vehicle and let run until temp gets up and fans cut in, you should see air being expelled from expansion bottle if an airlock was there! Replace expansion cap and turn vehicle off! System is bled! When thermostat and water pump replaced this would have been done then right?

Posted on Jan 11, 2015

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  • Kia Master
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I agree with your logic. Attached vid addresses bleeding. Sounds like at low rpms, not enough flow to transfer the heat. So bubble or maybe a partially obstructed core. There are a couple of vids on clearing a core... GOod luck, let us know if you figure it out.

Posted on Jan 11, 2015

Testimonial: "Should always ck temp gauge when racing engine before you over heat and blow motor"

  • mbarre Jan 11, 2015

    Ouch

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Make sure and top up your coolant at every fill-up for a while. Airlocked heat exchangers tend to burp out air at random until none is left. My saturn still has a little in it, i can hear it the first time i take off from a stoplight in the morning.

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2) If #1 is OK, the coolant system has an air blockage...With cold engine remove cap...Start engine...Heat control on high... when thermostat opens coolant AND air will escape from radiator...there will be coolant loss...Wait until all air escapes then carefully replace cap...When engine cools remove cap and top off coolant if required.....saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

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1 Answer

Heater bows cold when idling


Hya!
You need to bleed the cooling system.
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Have plenty of warm/hot water available, when engine reaches operating temp it may appear to boil over so keep away from coolant filler, top up with warm/hot water and wait as it may bubble over a few times before settling.
Replace cap and hopefully back to normal, Remember your Anti Freeze?
Good luck,
Paul 'W'
Oner~EDson(:0) {#><U.K.

Jan 16, 2009 | 1995 Nissan Altima

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