Mazda CX-5 Service & Repair Manual: Cylinder Head

Mazda CX-5 Service & Repair Manual / Engine / Engine Assembly / Valvetrain, Cylinder Head / 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 the engine oil injected from the oil shower pipe.
Because the SKYACTIV-G 2.0 is implemented on the Miller cycle, the intake manifold vacuum is insufficient during the intake valve opening timing. To improve this, the intake manifold vacuum insufficiency is supplemented with the adoption of the vacuum pump..

Purpose, Function

The cylinder head forms the combustion chamber and intake and exhaust ports.

Construction

The lightweight cylinder head is made of aluminum alloy with excellent thermal conductivity.
Designing a compact pentroof combustion chamber and positioning the spark plugs on the top of the combustion chamber has improved the combustion efficiency.
There are two intake valves and two exhaust valves per cylinder for a total of four valves and the intake/exhaust type has been changed to a cross-flow type, improving intake and exhaust efficiency.
High pressurization is achieved by optimizing the intake port shape, improving the tumble ratio, increasing the combustion speed, and suppressing knocking.
With the adoption of plastic region tightening* for the cylinder head bolts, axial force has been stabilized.

* Plastic region tightening is a method of controlling the tightening using the rotation angle of a bolt. By tightening to the region (plastic tightening region) in which bolt deformation does not become irreversible, variation in axial force is suppressed.

Cylinder Head Gasket

Purpose, Function The cylinder head gasket is installed between the cylinder head and cylinder block to prevent leakage of air-fuel mixture, combustion gas, engine oil, and engine coolant ...

Hydraulic Lash Adjuster (Hla) Inspection

HLA Troubleshooting Item Occurrence Possible cause Action 1 After replacing oil, sound occurs when starting engine ...

Other materials:

Hazard Warning Flasher
The hazard warning lights should always be used when you stop on or near a roadway in an emergency. The hazard warning lights warn other drivers that your vehicle is a traffic hazard and that they must take extreme caution when near it. Depress the hazard warning flasher and all the turn sig ...

Clutch Pedal Position (CPP) Switch Inspection [Skyactiv G 2.0]
Continuity Inspection 1. Verify that the CPP switch is installed properly.. 2. Disconnect the negative battery cable.. 3. Disconnect the CPP switch connector. 4. Verify that the continuity between CPP switch terminals A and B when the clutch pedal is depressed and when it is released is acc ...

Speaker [With Bose®]
Purpose Converts the audio signal from the audio unit to sound. High quality sound is provided for the driver and passengers. Function Full-range speakers, which can output wide-range sound from low to high frequency, have been adopted. A better sound effect an ...