Checking the version
Courtesy of VOLVO CARS OF NORTH AMERICA.
- Adjust the pressure regulator to a maximum pressure of 0.3 bar
- A gentle hissing sound may be heard from the oil filler opening. This is because an intake valve is open and cylinder pressure is leaking past the piston rings.
- Check the components and connections. See Checking air and vacuum hoses, turbocharged engines
- Apply soap solution to the connections if leakage is suspected
- Bubbles are permitted around the throttle spindle
- Small bubbles are permitted between throttle body (TB) and the intake hose (if the hose is made of plastic). There must not be any bubbles if the hose is made of rubber
- Checking for air leakage from the canister purge (CP) valve. Leakage is not permitted.