I get early a kerax 440 dxi 6x4 apparently the thermostat is working well, which I do not know if it can be the viscous that does not the necessary revolutions, starts when the temperature is to the maximum
If it is possible that the viscòzo is bad according to the mileage that the vehicle has, test with the engine stopped and at temperature turn it with the hand and check if the turn is heavy or is very light. Say the mileage you have.
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