VALVE CLEARANCE INSPECTION [MZR 1.8, MZR 2.0, MZR 2.5]

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1.  Disconnect the negative battery cable.

2.  Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

3.  Disconnect the wiring harness.

4.  Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

5.  Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

6.  Disconnect the ventilation hose from the cylinder head cover.

7.  Remove the dipstick.

8.  Remove the cylinder head cover. (See TIMING CHAIN REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

9.  Set the front mudguard (RH) out of the way. (See FRONT MUDGUARD REMOVAL/INSTALLATION.)

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

11.  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 [Engine cold]

IN: 0.22—0.28 mm {0.009—0.011 in}

EX: 0.27—0.33 mm {0.011—0.012 in}

•  If the valve clearance is out of the standard value, adjust it. (See VALVE CLEARANCE ADJUSTMENT [MZR 1.8, MZR 2.0, MZR 2.5].)

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

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

am6zzw00005153

Valve clearance [Engine cold]

IN: 0.22—0.28 mm {0.009—0.011 in}

EX: 0.27—0.33 mm {0.011—0.012 in}

•  If the valve clearance is out of the standard value, adjust it. (See VALVE CLEARANCE ADJUSTMENT [MZR 1.8, MZR 2.0, MZR 2.5].)

12.  Install in the reverse order of removal.