Question about 1999 Chevrolet S-10 Pickup

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1994 S-10 pick up takes forever to heat up.

Starts good runs great but takes forever to start putting out hot air.

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  • paul_v1955 Nov 18, 2008

    Thinking thermostat might be the problem.

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Could be the thermostat but also heating core partially corroded or plugged slowing down circulation.

Posted on Nov 18, 2008

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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


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.

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A couple of things comes to mind.....1, your Thermostat is not functional, as in it's stuck open etc. 2, the simple answer is the amount of fluid (water/anti-freeze) is low; make sure you have the fluids top-off. 3, you didn't say but if the air is or isn't blowing cold before it does get hot, maybe the vacuum line to the door to let the hot air come from your heater core is having a problem-or-the door itself is having a problem. Hope this helps,
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well it might overheat because air got into system, replace the thermostant and then fill system, run van keepin an eye on the temp, it will start to run hot because coolant has not filled the motor just the radiator, when it starts running hot shut it down, wait 3 minutes and start, now this is done with cap off,after restart coolant should get sucked in get filling radiator as needed,may get messy but got to bleed cooling system. hope thius helps.

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iwould check the selector motor,and also replace the thermostant,start with the stant first,the selector motor is what runs the door for hot or cold the motor is a common problem,if the temp gauge is showing a quick warm up temp then its the selector motor, if it takes a while to reach operating temp then replace the t-stant,also make sure the coolant is full in radiator,check when cold or warm,dont open when hot, hope this is helpful.

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