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Search Auto Parts Search car runs hot while idling Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum railgal New User Mar 15, 2008, 11:40 PM Post #1 of 5 (4511 views) car runs hot while idling Sign In I have a 2004 Kia Optima that I just paid off . However, as with every time I pay off a car something goes wrong. My can started running warm while sitting and idling at a drive thru - normally it runs and stays right below the 1/2 way mark. It was up right where the red begins. I turned on my heat and it soon began to drop. It has done this twice but doesn't run hot going down the road. My coolant was a little low but now it's full and still doing it. What can it be? I noticed that there are 2 fans both run when the AC is on and when the AC is off only 1 kicks on when it gets a certain temperature. However. I guess that is neither here nor there since my AC was running when my car ran hot so both fans were running at that time. Does anyone know what this could be? I appreciate any tips out there - I'm a single mom on a limited resources and don't want to get taken advantage of with several uneeded repairs. Thanks!! Tom Greenleaf Ultimate Carjunky / Moderator Mar 16, 2008, 6:26 AM Post #2 of 5 (4505 views) Re: car runs hot while idling Sign In How low was the coolant and has that ever been low before? At the moment it seems as the radiator is not adequate to cool the engine by itself. Leaves, other debris, in need of cooling system flush and pressure check cooling system for now. Do NOT let it overheat if at all possible, T RadiatorsRus New User Mar 17, 2008, 9:07 AM Post #3 of 5 (4499 views) Re: car runs hot while idling Sign In Your cooling system is starting to become plugged try and flush outside of radiator to remove debris. If that doesn't work i would check on repair or replacemant costs railgal New User Mar 17, 2008, 5:44 PM Post #4 of 5 (4494 views) Re: car runs hot while idling Sign In Thanks Tom. Well, I filled up the resevoir. I had a friend check it out and he put 1/2 gallon directly in the radiator on Sunday. It hasn't done it since but I also have not sat anywhere idling.... We'll see. I don't understand how it was so low - I haven't seen a leak. Well - I'm going to watch it and if I see it getting warm again I'll have a flush done. Thanks for the help!! Take care! Tom Greenleaf Ultimate Carjunky / Moderator Mar 18, 2008, 12:38 AM Post #5 of 5 (4490 views) Re: car runs hot while idling Sign In Yes - watch this daily or more! Cars do not normally consume coolant so there's a leak somewhere - perhaps a head gasket that you didn't want me to say if you don't see evidence Carry some pre-mixed coolant with you and learn how to add AND avoid getting burned. Opening a radiator when warm or hot can explode at you - use all caution! Feel (can be hot too) upper radiator hose as an indicator of how much pressure is in there before checking at the pressure cap. Hose may be too hot so use a towel or glove OR wait till it's totally cooled off if in doubt. Nobody likes an expense coming and I suspect one is for this. Better to catch it early as with most things, T   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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