Mazda LF - Valve Clearance Inspection; Valve Clearance Adjustment

B–24
ENGINE
Spool valve operation inspection
1. Disconnect the negative battery cable.
2. Remove the oil control valve (OCV).
3. Verify that the spool valve in the oil control valve
(OCV) is in the maximum valve timing retard
position as indicated in the figure.
• If not as specified, replace the oil control valve
(OCV).
4. Verify that the battery is fully charged.
• If not as specified, recharge the battery.
5. Apply battery positive voltage between the oil
control valve (OCV) terminals and verify that the
spool valve operates and moves to the maximum
valve timing advance position.
• If not as specified, replace the oil control valve
(OCV).
Note
• When applying battery positive voltage
between the oil control valve (OCV)
terminals, the connection can be either of
the following:
— Positive battery cable to terminal A,
negative battery cable to terminal B
— Positive battery cable to terminal B, negative battery cable to terminal A
6. Stop applying battery positive voltage and verify that the spool valve returns to the maximum valve timing
retard position.
• If not as specified, replace the oil control valve (OCV).
End Of Sie
VALVE CLEARANCE INSPECTION
A6E242412111E02
1. Measure the valve clearance as follows.
(1) Turn the crankshaft clockwise so that the
No.1 piston is at TDC of the compression
stroke.
(2) Measure the valve clearance at A in the
figure.
• If the valve clearance exceeds the space
the tappet. (See B–25 VALVE
CLEARANCE ADJUSTMENT.)
Note
• Make sure to note the measured values for
choosing the suitable replacement tappets.
Standard [Engine cold]
IN: 0.22—0.28 mm {0.0087—0.0110 in} (0.25±
±±
±0.03 mm {0.0098±
±±
±0.0011 in})
EX: 0.27—0.33 mm {0.0106—0.0130 in} (0.30±
±±
±0.03 mm {0.0118±
±±
±0.0011 in})
(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.
• If the valve clearance exceeds the standard, replace the tappet. (See B–25 VALVE CLEARANCE
ADJUSTMENT.)
Note
• Make sure to note the measured values for choosing the suitable replacement tappets.
Standard [Engine cold]
IN: 0.22—0.28 mm {0.0087—0.0110 in} (0.25±
±±
±0.03 mm {0.0098±
±±
±0.0011 in})
EX: 0.27—0.33 mm {0.0106—0.0130 in} (0.30±
±±
±0.03 mm {0.0118±
±±
±0.0011 in})
AME2226W003
AME2226W004
AME2212W001
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