Crankcase Ventilation, Check

Special Tool
Courtesy of VOLVO CARS CORPORATION	T9997226 PRESSURE GAUGE  Tool number:  T9997226 Tool description:  PRESSURE GAUGE Tool boards:

Carry out checks at idle with the engine at operating temperature corresponding to 15 minutes normal driving (100°C). If the oil quality/type and/or oil filter condition cannot be determined, replace the oil and filter.

Fig 1: Identifying Manometer, Dipstick And Tube

Courtesy of VOLVO CARS CORPORATION

Switch of the AC and other electrical equipment.

Reset the manometer using the adjuster screw.

Remove the dip stick.

see 9997226

Fig 2: Identifying Manometer Pressure Value

Courtesy of VOLVO CARS CORPORATION

The pressure values are given for sea level. High levels can reduce the reading slightly.

Read off manometer value.

The value for a clean crankcase ventilation is -0.2 kPa or lower.

If the manometer indicates a value from -0.2 up to 0.0 kPa or a positive value, the crankcase ventilation is partially or completely blocked and must be checked further.