Yes. You should see coolant when removing the radiator cap. Never use just water in an Alfa engine. Use a 50/50 mix of antifreeze and water. Fill the system from there, then fill the expansion tank.
That said, if the level is down (or flushing and refilling the system), you need to bleed the air out of the system (bleed only when the engine is cold). There are two bleed screws, one on the top of the water pump, and the other on the top of the intake manifold. If you do not bleed the system, you can get air pockets in the engine that can cause overheating. Important, also, is the thermostat. It should be working properly and be a 180-185F model on a Spica engine. DO NOT remove the thermostat in an attempt to cure a overheating problem. That will just make it worse. Coolant will circulate too rapidly to be cooled in the radiator before returning to the engine.
That said, if the level is down (or flushing and refilling the system), you need to bleed the air out of the system (bleed only when the engine is cold). There are two bleed screws, one on the top of the water pump, and the other on the top of the intake manifold. If you do not bleed the system, you can get air pockets in the engine that can cause overheating. Important, also, is the thermostat. It should be working properly and be a 180-185F model on a Spica engine. DO NOT remove the thermostat in an attempt to cure a overheating problem. That will just make it worse. Coolant will circulate too rapidly to be cooled in the radiator before returning to the engine.
