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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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MECHANICAL [SKYACTIV-G 2.0]

Outline

  • The following have been adopted to the SKYACTIV-G 2.0 to reduce sliding resistance *1.

    • Rocker arm (built in needle roller bearing)

    • Reducing the valve spring load

    • Narrowing down the crankshaft journal

    • Optimizing the piston skirt shape

    • Low-tension piston ring

    • Lowered tensioning of the drive belt

  • HLA has been adopted to achieve a maintenance-free design for valve clearance.

  • A piston cavity has been adopted to reduce cooling loss.

  • A variable valve timing mechanism has been adopted on both the intake side and the exhaust side to reduce pumping loss*2.

  • The rigidity and shape of the related parts have been optimized to stabilize the timing chain behavior and reduce sliding resistance.

  • A simple shaped aluminum-alloy cylinder head cover has been adopted.

*1
Resistance (friction force) which occurs when two object slide against each other. The larger the sliding resistance, the greater the energy loss.
*2
Energy loss which occurs from each type of resistance corresponding to intake and exhaust is called pumping loss.

Structural View

Structure

  • Consists of the following parts:

Cylinder head cover

(See CYLINDER HEAD COVER [SKYACTIV-G 2.0].)

Cylinder head

(See CYLINDER HEAD [SKYACTIV-G 2.0].)

Cylinder head gasket

(See CYLINDER HEAD GASKET [SKYACTIV-G 2.0].)

Cylinder block

(See CYLINDER BLOCK [SKYACTIV-G 2.0].)

Crankshaft

(See CRANKSHAFT, MAIN BEARING [SKYACTIV-G 2.0].)

Piston

(See PISTON, PISTON RING, PISTON PIN [SKYACTIV-G 2.0].)

Connecting rod

(See CONNECTING ROD, CONNECTING ROD BEARING [SKYACTIV-G 2.0].)

Engine front cover

(See ENGINE FRONT COVER [SKYACTIV-G 2.0].)

Crankshaft pulley

(See CRANKSHAFT PULLEY [SKYACTIV-G 2.0].)

Drive belt

(See DRIVE BELT [SKYACTIV-G 2.0].)

Valve mechanism

(See VALVE MECHANISM [SKYACTIV-G 2.0].)

Valve

(See VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE [SKYACTIV-G 2.0].)

HLA

(See HYDRAULIC LASH ADJUSTER, ROCKER ARM [SKYACTIV-G 2.0].)

Camshaft

(See CAMSHAFT [SKYACTIV-G 2.0].)

Timing chain

(See TIMING CHAIN, CHAIN TENSIONER [SKYACTIV-G 2.0].)

Variable valve timing mechanism

(See VARIABLE VALVE TIMING MECHANISM [SKYACTIV-G 2.0].)

OCV

(See OIL CONTROL VALVE (OCV) [SKYACTIV-G 2.0].)

Hydraulic variable valve timing actuator

(See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 2.0].)

Electric variable valve timing actuator

(See ELECTRIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 2.0].)

Electric variable valve timing relay

(See ELECTRIC VARIABLE VALVE TIMING RELAY [SKYACTIV-G 2.0].)

Engine mount

(See ENGINE MOUNT [SKYACTIV-G 2.0].)
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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