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2011 Hyundai Elantra GLS 4dr Sedan Man (Ulsan Plant)

2011 Hyundai Elantra
Trim Info:
Front Wheel Drive, 4 Door Sedan, Mid-Size
29 (est) mpg city / 40 (est) mpg hwy
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May 1, 2013, 11:18 pm

Dara G

Question: Cooling system issues

When my husband returned home from work today, he noticed that the temperature gauge was way high. This occurred as he was idling in the drive through after approximately a 45 min to 1 hour drive on the highway. He immediately turned off the AC, (he said the gauge dropped significantly, but not back to it's normal range), then came straight home and parked (about 3 blocks). After letting the engine cool, we looked and saw that the radiator overflow reservoir was nearly empty. We added enough 50/50 to bring it to the fill line (about 1/4 of a gallon), and ran the engine with the heater on for a few minutes to circulate the fluid, and checked the fluid level again. The fluid was staying at a steady level. We also checked under the car, and there were no noticeable wet spots. The only other item to mention is that I remember smelling an antifreeze odor near the car a few days earlier.

Our questions are:
1. Should we be concerned?
2. Is there anything else we need to do?
3. Is there anything else we need to watch for?

From my reading on the Internet, it seems that this could be from nothing all the way up to a blown head gasket. Please give us your opinion and advisement. Thank you! :)

May 5, 2013, 7:36 pm

Tyler O

Sounds like it just ran low on coolant. It's normal to lose some due to evaporation over time.

To be sure you should do a cooling system pressure test to find any leaks.

Be sure to keep all the fluids topped off and clean.

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