I concur, seeing as coolant (water?) is virtually incompressible but air can be, system must have some air somewhere. Some cars have bleed points on the heater hoses & without bleeding them you can’t get rid of the residual air.Air lock?
Yup. That will also explain why the ECU coolant sensor is saying that the coolant temperature doesn't match the expected value, i.e. if there is airthat reaches the ECU coolant sensor then the coolant sensor is giving a temperature that doesn't concur with the ECU expected temperature and this throws up an ECU error.I concur, seeing as coolant (water?) is virtually incompressible but air can be, system must have some air somewhere. Some cars have bleed points on the heater hoses & without bleeding them you can’t get rid of the residual air.
RonA
Has anyone had this symptom or know what could cause it?
The coolant level is at max. Once the engine has run the coolant level has gone right down. When the coolant bottle is opened, the level goes back up to max.
Yup. That will also explain why the ECU coolant sensor is saying that the coolant temperature doesn't match the expected value,
With all due respect, its not being pumped, but circulated.
Find the highest point in the circuit and bleed it.
Mark 1 Ford Galaxy, also sold as Volkswagen Sharan or SEAT Alhambra.What car is it? Some are prone to air locks
By air lock, you just mean air in the system stuck in some air trap?Sounds like an air lock on the pressure side of the pump. When the engine runs the air gets compressed and the fluid level drops to compensate. With the engine stopped the pressurised bubble slowly expands, increasing the water level.
What does it do? Just pressurise the cooling system?I've got one of these, don't use it too often but when I do it saves a lot of messing about..
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