Why is my Hyundai Oshan X7 losing coolant even though there are no visible leaks under the car?

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Why is my Hyundai Oshan X7 losing coolant even though there are no visible leaks under the car?

I regularly top up the coolant in my Oshan X7, but I don’t see any puddles under the car. Could there be a hidden radiator leak o r internal coolant loss that’s not immediately visible?

Gari Specialist asked on 12 Jul 2025 16:04:11 pm

1 Answer

10 views |

Gari Master - on 12 Jul 2025 16:06:09 pm

This is a common situation where coolant loss isnt obvious. Possible reasons include:

Hairline cracks in the radiator o r hoses: These only leak when the system is pressurized engine hot, and may evaporate before leaving visible puddles.

Coolant reservoir cap not sealing properly: Pressure escapes and coolant evaporates.

Evaporation from engine heat: In Pakistan’s high-temperature cities, coolant can vaporize faster if your cooling system is slightly compromised.

Internal leak: Coolant may leak into the engine head gasket issue, without visible external signs.

What to do:

Check for white smoke from the exhaust, which indicates coolant burning internally.

Inspect the radiator and hoses immediately after shutting off the engine when it’s hot.

Use a cooling system pressure test to detect hidden leaks.