2026-10-08 · 5 min read
Mitsubishi Eclipse Cross Thermostat Replacement Malaysia
The thermostat regulates coolant flow to keep the 4B40 engine at its optimal operating temperature. A stuck-open thermostat causes the engine to run cool — reducing efficiency and increasing fuel consumption. A stuck-closed thermostat is more serious and leads to rapid overheating. Thermostat failure is not a scheduled maintenance item but becomes more likely with age and high mileage. Replace the thermostat whenever the cooling system is opened for major repairs.
Eclipse Cross Thermostat
- Replace at 100,000 km or if temperature gauge reads abnormally high or low
- A failing thermostat affects turbo operation — turbo requires specific oil temperature for optimal sealing
- Replace with OEM-spec thermostat — incorrect spec changes engine temperature and affects fuel trims