I recently serviced the i30, changed all the fluids including the coolant. When i refilled the coolant it didnt take enough so first drive after it pushed a lot of air through and got a bit hotter than normal, i refilled again when it cooled down and temps returned to normal. It drives fine, no issues.
Now i noticed several weeks later i have to keep topping up the coolant reservoir as it has emptied out, I expected once or twice but this is starting to get me worried especially as the wife hardly looks at the gauges when she is driving it. Would this still be pushing air pockets through or have i got a leak somewhere? Oil isnt contaminated and the engine is running fine so i dont believe it has blown a head gasket (i could be wrong of course, but i doubt it is that), i cant see any leaks though at the rate it needs refilling any leak would be small. The only thing i could think of is maybe when i removed the radiator drain it damaged/unsettled the probably baked o-ring and may be leaking under pressure from there, or maybe removing the radiator cap damaged the radiator or cap seal though i would expect to see other evidence.
Any other ideas?