Brother if PCV valve is working fine and oil is not coming through it as it sucks pressurized air in the crankcase, then its probably the oil rings which are failing or the valve seals are leaking and engine is eating oil. The presence of air as you described it apparently means the engine is weak. I am not sure if a mechanic in Okara can sort this up. You probably will need to bring it to Lahore.
And as it happens Okara is my ancestral town. But honestly I don't think you can find a mechanic with required expertise.