Why do many Changan Kalam users in Pakistan experience frequent engine overheating, later diagnosed as a thermostat failure?

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Why do many Changan Kalam users in Pakistan experience frequent engine overheating, later diagnosed as a thermostat failure?

Drivers report sudden temperature spikes on long routes. Is the thermostat not opening properly to allow coolant flow?

Qalb E Momin asked on 18 Jun 2025 18:11:41 pm

1 Answer

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Car Mechanic Expert - on 18 Jun 2025 18:15:27 pm

🔴 Yes — this is a commonly reported problem.

Primary issue: The thermostat fails to open properly, restricting coolant circulation.

Effect: The engine overheats, especially on highways o r under load.

Cause: Possible use of low-grade wax pellet thermostats that cannot handle high thermal cycling in Pakistan’s environment.

🛠️ Conclusion: The OEM thermostat may lack durability, and heat-related mechanical failure is the root cause in many cases.