Question about Hyundai Motor 2004 Sonata

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2004 hyundai sonata over heating no leaks

My car is over heating I just flushed the radiator out, changed the thermostat, changed the cap, no leaks and fans are working but it still over heats what could the problem be? please help

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  • Brenda De La Cruz Feb 24, 2012

    Ok so I did what you suggested, I checked the ignition timing and spark plug and everything is good on it, but it's still overheating any other suggestion as to what I should check or what can be causing it to overheat?

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6 Answers

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Probably have an air pocket in the cooling system.

Posted on Apr 25, 2015

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  • Hyundai Master
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Did you put the right mix of water and antifreeze back in?

Posted on Apr 25, 2015

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Look at the front of the car. Specifically in the grill at the coils in there. You are look at the A/C condenser. Clean it. If you put a light between the engine and radiator an can't see it threw the front. It is clogged. No air threw the condenser, means no air threw the radiator.

Posted on Apr 25, 2015

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Try this procedure:

  • The thermostat can be stuck close. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck thermostat.

  • Make sure the radiator and the overflow bottle are filled to the proper levels.

  • Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

  • Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

  • Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.

Posted on Apr 25, 2015

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You've looked in all the right places so far, and presuming the water pump is operating correctly (fan belt adjusted) and there is sufficient oil to lubricate motor, I'd suggest checking your ignition timing. If the timing is too far advanced i.e.firing too much before top dead centre-BTDC, then a motor is inclined to over-heat. Another cause of over heating is a lean fuel mixture. Examine spark plug electrodes - they should be brown to light tan colour. Light grey to white indicates lean burn and subsequent over-heat.
Take care around a hot engine.

Posted on Feb 24, 2012

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Your giving it to much pressure take it slowly

Posted on Apr 25, 2015

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Posted on Jan 02, 2017

ghost45
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SOURCE: 2004 hyundai sante fe is making coolant boil back

I take it this only happens when the vehicle is stopped & idling? If not, check radiator & hoses for blockage (since you've already replaced the thermostat & top hose) - repair/replace as needed. Next, check the coolant temperature sensor's operation (there are two sensors - one for the temp gauge on the instrument panel, the other is used by the ECM (PCM). If that one is malfunctioning (i.e., telling the computer that the engine coolant temperature is less than it actually is, The ECM (PCM) it won't turn on the cooling fans.
Since you didn't specify which engine you have (i.e., 2.4, 2.6 or 3.5), Photo locations of all three are included here.

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Hope this helps.

Posted on Sep 07, 2009

MNfisherman
  • 11896 Answers

SOURCE: where is the thermostat in a 2004 Hyundai Sonata

follow the top radiator hose. Right where it attaches to the engine, there should be 3 screws and the thermostat will be there.

Posted on Jun 18, 2009

jpk528
  • 95 Answers

SOURCE: 04 sonata stereo wireing diagram

Battery ORANGE (+) RADIO HARNESS
Accesory YELLOW (+) RADIO HARNESS
Ground BLACK (-) RADIO HARNESS
LF Speaker (+) BROWN/WHITE
LF Speaker (-) BLACK/WHITE
RF Speaker (+) BROWN/YELLOW
RF Speaker (-) BLACK/YELLOW
LR Speaker (+) BROWN/RED
LR Speaker (-) BLACK/RED
RR Speaker (+) BROWN/WHITE
RR Speaker (-) BLACK/WHITE

Posted on Feb 20, 2009

  • 69 Answers

SOURCE: Removal of Radio in 2004 Hyundai Sonata

Remove the facia plate, and remove the 4 screws that hold the radio in place. It's actually one of the simplest cars you can do.

Posted on May 27, 2009

SOURCE: my 2004 elantra overheated, the radiator cracked,

did you check the cooling fan its work ? did you bleed the colling sistem & to add a new antifreeze maybe you have a problem in the temp sensor o wires of the sistem

Posted on Jul 16, 2009

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