car has low coolant light on. isthat resvior the coolant for the radiator or do i need to add coolant inside of that too? and if i wanna flush the system where is the drain?
coolant level sensor is in the overflow bottle. when cold, add some to the radiator and fill the over flow to the cold fill, run till the thermostat opens and see if you need to add more.
the drain is on the passenger side towards the bottom of the radiator. big plastic nut.
Just a word of advice. In my opinion it is much better to just take the lower radiator hose off even if you have to cut it off than to open the petcock. If the petcock is old and messed, turning it can crack the plastic tank on the radiator. A new radiator hose is much cheaper than a new radiator.
Yep, alot of us have the low coolant light, it's simply that the sensor in the tank gets cruddy and won't take the reading correctly. Clean that up and the light should go off