Why does the thermostat get stuck open o r closed in Honda City, and how does it impact the engine?

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Why does the thermostat get stuck open o r closed in Honda City, and how does it impact the engine?

If a thermostat is stuck open, the engine may run too cold, affecting fuel consumption.
If it’s stuck closed, the engine can overheat, leading to severe damage.
What causes these failures, and how can they be prevented?

Sirat Ul Jinan asked on 26 Feb 2025 10:55:52 am

1 Answer

11 views |

Car Mechanic Expert - on 26 Feb 2025 10:58:16 am

Causes of Thermostat Failure:

Thermostat Stuck Open: This occurs when the thermostat fails to close, allowing coolant to constantly flow through the radiator. The engine runs too cold, leading to inefficient fuel combustion and poor fuel economy.
Thermostat Stuck Closed: This occurs when the thermostat fails to open, blocking the coolant from circulating to the radiator, causing the engine to overheat.

Impact on the Engine:

Stuck Open: Causes the engine to run cooler than normal, which can result in poor fuel efficiency, reduced heater performance, and increased emissions.
Stuck Closed: Causes overheating, which can result in engine damage such as warped cylinder heads, blown gaskets, o r even engine failure.

Prevention:

Regular maintenance of the cooling system, including checking and replacing the thermostat at appropriate intervals.
Use of high-quality coolant to prevent deposits from clogging the thermostat.