Hi there,
You will have to get the cooling system pressure tested to determine the cause of the coolant loss, this will locate any external leaks, The coolant will flow through all the cooling system straight away, you will have to run the car with the heater on so any air trapped there can bleed out, with the run the engine with the radiator cap off and wait till it warms up, when the thermostat opens you may see a loss off coolant just turn it off and top it up, replace the cap and re check cold the next day, if you still have a coolant problem you may need to get the engine tested for internal leaks as well.
Mark (mhpautos)
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Tuesday, December 16th, 2008 AT 3:45 AM