Why does the engine still overheat after changing thermostat and temp coolant sensor?

Asked by Jul 26, 2010 at 10:24 PM about the Kia Rio

Question type: Maintenance & Repair

I notice the fan doesn't come on when the engine heats up. I figured it could be the coolant sensor or the thermostat so I changed them both but it still heats up.

1 Answer

265

Check the wiring to the switch on the radiator, make sure the connection is good. If fan still does not operate as it should change the switch. Also check that there is no oil in the coolant system, and no water in the oil, this generally shows up with creamy gunge on the oil filler cap. You need to be careful with an overheating engine, as all sorts of problems can occur through this. The coolant temperature sender is part of the ecu system for your car, it tells the ecu what the exact temp. is for the sake of air and petrol mix for your engine for emission purposes. If you changed the coolant recently, do check for air in the system, make sure that the coolant is circulating properly.

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • KIA Rio 2003 1.5 L Sedan over heating 23 answers

    i have changed spark plug before and i have checked compatibility list in NGK site and bought Iridium one so first thing i have changed and set default spark plug i have went to lots of mechanics an...

    2003 Kia Rio Base

    -

    Maintenance & Repair

  • were is the coolant sensor on 2004 rio 1 answer

    2004 Kia Rio

    -

    Maintenance & Repair

  • P0302 Cylinder 2 misfire 37 answers

    I have a P0302 fault (cylinder 2 misfire). I replaced the spark plugs just a week ago, and when I checked them today they all still look new, except for the cylinder 2 plug. It is completely corroded...

    2001 Kia Rio Base

    -

    Maintenance & Repair

  • why will my car not start? 13 answers

    My car was parked on down slope all day. As I drove away it stalled and would not start again. It was low on fuel, so I put 5 gals in. It still would not start. I towed it home and put in on level gr...

    2004 Kia Rio Base

    -

    Maintenance & Repair

  • 01 kia rio won't stay running 9 answers

    My car will not stay running. Dies out all the time! New battery spark plugs/wires oil changed. Father in law mechanic and can't figure it out

    2001 Kia Rio

    -

    General

Search Kia Rio Questions

Kia Rio Experts

#1 abcdef8
abcdef8
Reputation 650
#2 flippinthemadstyles
flippinthemadstyles
Reputation 490
#2 Tom Demyan
Tom Demyan
Reputation 490
View All

Related Models For Sale

Used Kia Forte
144 Great Deals out of 15,869 listings starting at $3,200
Used Hyundai Accent
175 Great Deals out of 12,611 listings starting at $1,300
Used Honda Civic
511 Great Deals out of 80,658 listings starting at $558
Used Toyota Corolla
722 Great Deals out of 74,312 listings starting at $1,790
Used Hyundai Elantra
471 Great Deals out of 52,086 listings starting at $1,699
Used Ford Focus
541 Great Deals out of 55,231 listings starting at $500
Used Kia Optima
386 Great Deals out of 29,450 listings starting at $1,700
Used Kia Soul
274 Great Deals out of 28,235 listings starting at $3,500
Used Nissan Sentra
437 Great Deals out of 52,822 listings starting at $1,600
Used Kia Rio5
11 Great Deals out of 1,077 listings starting at $4,799
Used Nissan Versa
315 Great Deals out of 19,721 listings starting at $999
Used Honda Accord
685 Great Deals out of 81,559 listings starting at $1,200
Used Ford Fiesta
106 Great Deals out of 15,543 listings starting at $3,895
Used Toyota Camry
875 Great Deals out of 91,061 listings starting at $1,300
Used Mazda MAZDA3
221 Great Deals out of 29,134 listings starting at $1,495