Expedition 2019 coolant level

[adilaliecom]

Hello,
I recently got a ford expedition 2019 with 160000km (100000 miles) on it.
It was working fine. Last week i saw coolant temp went a bit. I tool to mechanic and found radiator leak. Radiator was replaced and coolant poured till max level (motorcraft).
After a day, coolamt level dropped to minimum level in overflow tank.
It was topped off.
IT was driven for 200km and no level drop was observed.
After cooldown ik morning, level was dropped to minimum again.
What can be the reasons.
It is dropping only in cold state.
Mechanic is unable to find any leak.
No water detected in engine so no head gasket issue.

 

[99WhiteC5Coupe]

Hello,
I recently got a ford expedition 2019 with 160000km (100000 miles) on it.
It was working fine. Last week i saw coolant temp went a bit. I tool to mechanic and found radiator leak. Radiator was replaced and coolant poured till max level (motorcraft).
After a day, coolamt level dropped to minimum level in overflow tank.
It was topped off.
IT was driven for 200km and no level drop was observed.
After cooldown ik morning, level was dropped to minimum again.
What can be the reasons.
It is dropping only in cold state.
Mechanic is unable to find any leak.
No water detected in engine so no head gasket issue.

Replacing the radiator caused most of the engine coolant to be drained, and then refilled.

If the process was not done properly, the mechanic may have left air in the cooling system.

As you drive the vehicle, any air is slowly purged from the system, causing the coolant level to drop when the engine cools.

Topping off the fluid and going through several drive cycles probably purged all the air in the system.

Now, when the engine is hot - the coolant level should be at the “max” or “full” level in the coolant reservoir (as the coolant expands when hot). When the engine cools (even is it is hot outside), the engine coolant level will drop to the minimum level.