Does the Alsvin thermostat get stuck closed, preventing proper coolant flow and causing the engine to overheat?

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Does the Alsvin thermostat get stuck closed, preventing proper coolant flow and causing the engine to overheat?

Is thermostat malfunction a known issue in the Pakistani market?

Zarnish asked on 11 Jun 2025 18:01:55 pm

1 Answer

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Car Mechanic Expert - on 11 Jun 2025 18:06:17 pm

Yes, thermostat failure is a known but underreported issue in Pakistan. A stuck thermostat in closed position:

Prevents coolant from reaching the radiator.

Causes the engine to overheat rapidly after just a few kilometers.
This can happen due to sludge, scale, o r incompatible coolant damaging the thermostats wax valve.