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PAIR CONTROL VALVE
• Inspect that air flows through the PAIR control valve air inlet
port to the air outlet ports.
• If air does not flow out, replace the PAIR valve with a new
one.
• Connect the vacuum pump gauge to the vacuum port of the
control valve as shown in the photograph.
• Apply negative pressure of the specification slowly to the con-
trol valve and inspect the air flow.
• If air does not flow out, the control valve is in normal condition.
• If the control valve does not function within the specification,
replace the control valve with a new one.
_ Negative pressure range: More than 66.6 kPa
(491 mmHg)
1m
09917-47010: Vacuum
pump
gauge
ICAUTION I
Use a hand operated vacuum
pump
to prevent the
control
valve damage.
CAMSHAFT
CAMSHAFT IDENTIFICATION
The exhaust camshaft can be distinguished from that of the
intake by the embossed letters "EX" (for exhaust) as against let-
ters "IN" (for intake).
CAM WEAR
• Check the camshaft for wear or damage.
• Measure the cam height
(8)
with a micrometer.
_ Cam
height
(8):
Service Limit: (IN.) : 36.71 mm (1.445 in)
(EX.) : 35.68 mm (1.405 in)
jWot,
09900-20202: Micrometer (25 - 50 mm)
ENGINE
3-29