Checking exhaust system: Procedure

WARNING: This page is about a different variant/trim than selected.

Fig 1: Checking Exhaust System For Leaks Between Cylinder Head & Rear Heated Oxygen Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check exhaust system by spraying soapy water on all joints and connections between cylinder head and rear HO2S.
Only extremely small and slowly increasing bubbles are permissible.