How to disassemble BYD Song pcv four-way valve?

Process:

First, remove the screws fixed on the hydraulic station, and pay attention to the sealing ring on the valve block when removing. If it is deformed, please replace it with a new one. In addition, the exposed oil holes on the hydraulic station should not be polluted. When installing a new sealing ring, if it is difficult to fix it, you can apply butter around the sealing ring. When tightening screws, tighten them diagonally first, and then tighten them diagonally gradually. It's tight, but not too dead. Pay attention to the diagonal of the screw, otherwise the sealing ring will be deformed due to uneven stress. It is best to screw the screws by one person, so that each screw bears the same force.

Extended data

Positive crankcase ventilation

definition

Crankcase (or oil pan) active ventilation control system. PCV valve consists of valve body, valve, bonnet and spring, which are inseparable.

function

The phenomena of throttle icing, insufficient combustion and emission deterioration are avoided.

Prevent gas from entering the atmosphere.

Prevent engine oil from deteriorating.