Take it off the vehicle andflush it with water.
It is possible to put water only in the reservoir for coolant on a car. However, this should only be a temporary fix until it can be repaired by a mechanic.
Radiator coolant.
Sound like ur head gasket has a crack or is blown need to fix it ASAP
Check around the reservior for a wire harness going to there. Try tapping on it.
On my 2000 3 Series, it is right in front of the engine near the coolant reservior.
check/replace the engine coolant level sensor located in the engine coolant overflow reservior (located at the rear of the engine compartment pass. side)
Low coolant, bad coolant tank cap, stuck thermostat, or clogged coolant line.
the pump for the washers is contained in the reservior which is located on the right side of the engine compartment right by your coolant reservior. the sprayers themselves are just tubes that run up your windshield wiper arms.
Actually , what I did was go and buy a cheap plastic turkey baster and used that to suck the coolant out of the tank - it took less time than I figured
You can replace it. Or you get a plastic tank fix kit in AutoZone or Advance Auto Parts.
Could be a clogged radiator Could be water pump is not circulating coolant
it sounds like its clogged.