Report: Replacement of Breather Box,Oil Trap
Volvo S80 Problem
Model Year Affected: 2003
at 103K the Car began a high pitched hum or squeal after the car warmed up. The squealing could be temporarily stopped by pressing the accelerator. The car was diagnosed as a cracked breather box, also known as, the flame trap, the oil trap. A small plastic box connected to the PCV System that has a plastic nipple that cracks and squeals form the oil pressure. The repair is difficult to get to and costs a lot in labor. My technician told me this is a common problem around 100K due to Volvo increasing the oil change intervals to 7500mils. Volvo even recalled and issued a service bulletin for many S80's. Mine was not covered.