sau4u

I have a 2005 F350 diesel 6.0 litre. When the motor is cold the antifreeze level is proper but when the motor warms up it disappears out the overflow tank, it doesnt leak on the ground and the temperature is normal. When the motor cools down the antifreeze level comes back again, seems to me it should stay the same no matter what. Any suggestions.

AU dude

When the motor warms up it pressurizes the cooling system, and takes the water out from the overflow tank, so this is normal. as long as level is at max when the engine is cold it is fine.

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