I Have 2013 City Aspire 157000 Mileage, a few months ago head gasket was blown. It was repaired but few days ago while driving I found power dropped significantly, i showed to the mechanic and he said that oil is coming in plugs and plug shorted. He told me to replace engine with kabuli, but I told him to change plug for now. Now plugs are shorting on regular intervals, like 4-5 days and its only two outer most cylinders only. No issue in both center cylinders, should I replace engine with kabuli or there is something else I can do to remove this issue?? I'm currently not in position to change complete engine financially. please help.