Hello guys i need your help i have a leak in my cooling system from the radiator to the bottle ,every day i see arroung 3 oz of coolant i take them and poor them back in the system if i leave it the water accumulation will go higher.
i changed the water cap and my mechanic said that the water valve is ok .
the fans works normally ,the engine is not overheating ,everything is ok in the car .
any imput will be much apreciated .
Thank You

 

When your mechanic said the water valve was ok, was he talking about the radiator drain plug? I think there's an o-ring there that could be the source of the leak. Another possibility is a small pin hole, or crack in one of your radiator hoses.