ENGINE 3-29
ENGINE COMPONENTS INSPECTION
AND SERVICE
#
Identify the position of each removed part. Organize the
parts in their respective groups (i.e., intake, exhaust, No.1
or No.2) so that they can be installed in their original
locations.
PAIR VALVE
PAIR REED VALVE
• Remove the PAIR valve cover.
• Inspect the reed valve for the carbon deposit.
• If the carbon deposit is found in the reed valve, replace the
PAIR control valve with a new one.
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)
[ 09917-47010: Vacuum pump gauge
#
Use a hand operated vacuum pump to prevent the con-
trol valve damage.
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