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Front grill muff and driving at high or low temperatures

The 2CV was delivered with a front grill muff. It is to be used when the temperatures drops below 10º C (50º F). But if the temperatures climbs above 15º C (59º F) it is very important to remove the front grill cover again.
If you do a longer trip at full speed at higher temperatures with the grill cover on you will damage or destroy the motor.

Front grill muff

If you start when it is cold you have to make sure not to put a high load on the motor before it reaches an oil temperature of 80º C (176º F). Don't go at full speed.
At very low temperatures i.e. below -20º C (-4ºF) let the motor idle for some minutes. Before you start have a short look under the car if oil is leaking. The reason is the oil filter. At extreme low temperatures the oil will be almost frozen. But the oil pump will press it with such extreme pressure into the filter that it can blow it apart. If you drive away without knowing this - you won't get far. So better check.
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