Thermostat

If you notice that the engine temperature does not reach or exceeds its normal operating temperature it may be time to replace the thermostat.

There are two possible types of thermostat failures:

If the thermostat remains in the open position, the engine won’t reach its normal operating temperature. This happens because the coolant isn't heated properly, leading to increased fuel consumption and/or the heating system taking much longer to warm up.

If the thermostat is stuck in the closed position, the engine will overheat because the coolant isn’t circulating to the radiator. This can lead to several serious issues, such as a blown head gasket, warping of the cylinder head, or even complete engine failure. Catching and addressing thermostat issues early can prevent these more severe problems and keep your 4x4 running smoothly.