VALVE CLEARANCE INSPECTION [MZR 2.3 DISI Turbo]

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1.  Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

2.  Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

3.  Remove the charge air cooler. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

4.  Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

5.  Disconnect the ventilation hose from the cylinder head cover. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

6.  Remove the cylinder head cover. (See TIMING CHAIN REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

7.  Remove the splash shield (RH). (See SPLASH SHIELD REMOVAL/INSTALLATION.)

8.  Measure the valve clearance.

Note

•  Make sure to note down the measured values for choosing the suitable replacement tappets.

(1)  Turn the crankshaft clockwise so that the No.1 piston is at top dead center (TDC) of the compression stroke.

(2)  Measure the valve clearance at A in the figure.

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Valve clearance for inspection [Engine cold]

IN: 0.22—0.30 mm {0.009—0.011 in}

EX: 0.27—0.37 mm {0.011—0.014 in}

(3)  If the valve clearance is out of the standard value, adjust it. (See VALVE CLEARANCE ADJUSTMENT [MZR 2.3 DISI Turbo].)

(4)  Turn the crankshaft 360° clockwise so that the No.4 piston is at TDC of the compression stroke.

(5)  Measure the valve clearance at B in the figure.

Valve clearance for inspection [Engine cold]

IN: 0.22—0.30 mm {0.009—0.011 in}

EX: 0.27—0.37 mm {0.011—0.014 in}

(6)  If the valve clearance is out of the standard value, adjust it. (See VALVE CLEARANCE ADJUSTMENT [MZR 2.3 DISI Turbo].)

9.  Install in the reverse order of removal.