Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) System
Purpose, Outline
-
Prevents release of blow-by gas (unburnt gas) into the atmosphere.
-
The intake manifold vacuum introduces blow-by gas to the intake manifold via the PCV valve and the ventilation hose.
System Diagram
Structure
-
The positive crankcase ventilation system consists of the following parts:
|
Part name |
Reference |
|
PCV valve |
(See POSITIVE CRANKCASE VENTILATION (PCV) VALVE [SKYACTIV-G 2.0].) |
|
Ventilation hose |
? |
Exhaust Gas Purification System
Purpose, Outline
Purifies contaminants (HC, CO, NOx) in the exhaust gas by utilizing the chemical
reactions of the three-way catalytic converter.
System Diagram
Structure
T ...
Positive Crankcase Ventilation (PCV) Valve Inspection
Airflow Inspection
1. Disconnect the section (A) of ventilation hose shown in the figure.
2. Start the engine and verify that vacuum is applied to the end of the disconnected
ventilation hose ...
Other materials:
Electric Variable Valve Timing Motor/Driver Removal/Installation
WARNING:
A hot engine can cause severe burns. Turn off the engine and wait until it
is cool before servicing.
CAUTION:
Applying excessive force (force of 100 N {10.2 kgf, 22.5 lbf} or more) to
the electric variable valve timing motor/driver may cause a malfunction. When
...
Ignition Coil Inspection [Skyactiv G 2.0]
Ignition Coil Inspection
1. Perform the spark test and identify the malfunctioning cylinder..
2. Replace the ignition coil of the malfunctioning cylinder with that of a normal
cylinder, and perform the spark test again..
If the spark is not normal due to a malfunctioning ignition coil, ...
Cylinder Head
Outline
With the adoption of the rocker arm (built into needle roller bearing), the
sliding resistance has been reduced.
With the adoption of the HLA, the valve clearance is maintained at 0 mm at
all the times.
The contact point of the rocker arm and cam is lubricated by ...
