2026-10-08 · 5 min read
Mitsubishi Galant Fortis Thermostat Malaysia
The thermostat regulates engine operating temperature on the Galant Fortis — a thermostat that is stuck open results in the engine never reaching normal operating temperature (reducing efficiency and increasing wear), while one stuck closed causes overheating. On a high-mileage unit, the thermostat is a relatively low-cost item to proactively replace during cooling system service. If your temperature gauge takes unusually long to rise or rarely reaches the midpoint, suspect the thermostat.
Galant Fortis Thermostat
- Replace at 100,000 km preventively — aging thermostat failure causes overheating which can damage the 4B11 head gasket
- Replace thermostat and coolant at the same time for comprehensive cooling system refresh
- Use OEM-spec thermostat — incorrect opening temperature affects MIVEC operation and fuel economy