2004 Kia Optima Temperature gauge goes into red

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vahitter
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Joined: Fri Dec 21, 2012 11:03 am

2004 Kia Optima Temperature gauge goes into red

Unread post by vahitter » Fri Dec 21, 2012 11:09 am

i have a 04 kia optima, temp gauge in the red but car is not running hot. put in new temp sensor, gauge still in red

 

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TerryAuto
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Joined: Fri Dec 11, 2009 8:48 pm

Re: 04 kia optima

Unread post by TerryAuto » Sat Dec 22, 2012 9:39 pm

Is the temperature gauge in the red as soon as you start the car, or does it just keep rising as the engine is getting hotter?
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vahitter
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Joined: Fri Dec 21, 2012 11:03 am

Re: 04 kia optima

Unread post by vahitter » Sun Dec 23, 2012 12:29 am

gauge keeps rising as the engine gets hotter, and sometimes heater blows cold air

vahitter
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Joined: Fri Dec 21, 2012 11:03 am

Re: 04 kia optima

Unread post by vahitter » Sun Dec 23, 2012 12:30 am

[quote="TerryAuto"]Is the temperature gauge in the red as soon as you start the car, or does it just keep rising as the engine is getting hotter?[/quote]

it keeps rising as engine gets hotter.

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TerryAuto
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Re: 04 kia optima

Unread post by TerryAuto » Sun Dec 23, 2012 4:13 pm

OK, then your engine may actually be overheating.
The gauge seems to be working correctly. The key to your problem is that the heater blows cold air sometimes. This is caused by an air pocket in the cooling system. The heater core cannot transfer heat into the car from coolant with air pockets.

Air pockets can be caused by low coolant level, the system was not properly bled after a repair that caused coolant to be lost, or a blown headgasket.

Sounds like you have the last problem of a blown headgasket, since this started before any work was done.
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malik125
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Joined: Thu Oct 23, 2014 5:44 am

Re: 2004 Kia Optima Temperature gauge goes into red

Unread post by malik125 » Thu Oct 23, 2014 5:45 am

OK, then your engine may actually be overheating.
The gauge seems to be working correctly. The key to your problem is that the heater blows cold air sometimes. This is caused by an air pocket in the cooling system. The heater core cannot transfer heat into the car from coolant with air pockets.

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