Overheating when driving at 80- above Km/H

Asked by Zeeshan ul Hassan Jan 22, 2019 at 05:49 AM about the 2012 Hyundai Elantra GL Sedan FWD

Question type: Maintenance & Repair

I have Hyundai Elantra 2012 basic model.

Yesterday I was driving on a highway at around 100 Km/H and suddenly I
saw that heat bar was higher than the usual. I stopped my car in the side
way and checked if there is any leakage but there was no leakage. Then I
checked the coolant level in the radiator bottle and it was fine. After that I
checked the fan which was working normal. In the evening I took my car to
the mechanic and he checked the car and mentioned that thermostat
needed to be change. I went to the official dealer and purchased a
thermostat and it was changed and radiator was flushed by the mechanic
however radiator pipes were fine. However, I am still facing the same issue,
my car is working normal at 60-70 Km/H however, if I speed up to around 80-
above Km/H it will starts overheating.

JFYI, i recently changed the engine oil and I know that it is not related to the
issue. Can anyone give me an idea what is the exact issue and to whom
should I approach.


3 Answers


Replace radiator cap. If that doesn't help might be a bad head gasket

already changed the radiator cap, still the issue persist. Head Gasket have nothing to do with it as the water in the radiator doesn't change the color or muddy. I will try to check my water pump body may be it is having an issue. I will keep posting till this issue is resolved. Thanks for your suggestion.


I'm not sure how many miles or how hard you run your car.the water pump could be another possibility as you stated. I believe the engine you have is a open deck block which coolant runs right outside the cylinder walls.a blown heat gasket could be letting coolant into the cylinder causing it to overheat. It wouldn't mix with oil. But since your levels still shows full if its not the water pump it could be a collapse hose or pinch one.check the small ones as well as it only over heats at high speeds

Your Answer:


Looking for a Used Elantra in your area?

CarGurus has 46,928 nationwide Elantra listings starting at $1,100.


Hyundai Elantra Experts

  • #1
  • #2
  • #3
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Hyundai Sonata
669 Great Deals out of 34,636 listings starting at $995
Used Honda Civic
793 Great Deals out of 60,193 listings starting at $950
Used Toyota Corolla
1,042 Great Deals out of 55,118 listings starting at $900
Used Hyundai Accent
315 Great Deals out of 9,733 listings starting at $900
Used Honda Accord
975 Great Deals out of 61,252 listings starting at $1,270
Used Toyota Camry
1,160 Great Deals out of 72,610 listings starting at $1,200
Used Nissan Altima
1,289 Great Deals out of 65,372 listings starting at $1,000
Used Chevrolet Cruze
771 Great Deals out of 20,291 listings starting at $1,500
Used Kia Optima
599 Great Deals out of 30,309 listings starting at $2,450
Used Kia Forte
372 Great Deals out of 23,960 listings starting at $1,800
Used Hyundai Elantra GT
67 Great Deals out of 3,100 listings starting at $4,707
Used Nissan Sentra
952 Great Deals out of 39,740 listings starting at $1,400
Used Mazda MAZDA3
329 Great Deals out of 17,162 listings starting at $1,500
Used Ford Focus
735 Great Deals out of 20,327 listings starting at $599
Used Ford Fusion
1,062 Great Deals out of 47,461 listings starting at $1,000

Used Cars for Sale

2020 Hyundai Elantra For Sale
4 Great Deals out of 25,661 listings starting at $11,900
2019 Hyundai Elantra For Sale
80 Great Deals out of 2,740 listings starting at $9,791
2018 Hyundai Elantra For Sale
175 Great Deals out of 4,511 listings starting at $7,882
2017 Hyundai Elantra For Sale
310 Great Deals out of 6,794 listings starting at $5,450
2016 Hyundai Elantra For Sale
86 Great Deals out of 1,619 listings starting at $4,952

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.