Hi had spark plug oil seals done on my volvo S60T5 by mechanic now car is running rough no 2 injector not firing then mechanic changes it with number 3 it works fine any idea please mechanic had car for 3 months now trying to work this problem out

Thank you I just cleaned spark plugs and excess oil up now car is blowing smoke is this just system clearing it self

Hi I have volvo S60T5 the spark plug wells are filling with oil mechanic informed me spark plug oil rings are gone went to do job but have no idea were the oil rings go any help would be appreciated