wsm wg972-e4, Workshop Manual

Page: 109 / 153

ENGINE
WG972-E4, WSM
1-S18
CAUTION
• When removing the radiator cap, wait at least ten minutes after the engine has stopped and cooled down.
Otherwise, hot water may gush out, scalding nearby people.
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Radiator Cap Air Leakage
1. Set a radiator tester (1) and an adaptor (2) on the radiator cap.
2. Apply the specified pressure (90 kPa, 0.9 kgf/cm
2
, 10 psi), and
measure the time for the pressure to fall to 60 kPa (0.6 kgf/cm
2
,
9 psi).
3. If the measurement is less than the factory specification,
replace the radiator cap.
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Radiator Water Leakage
1. Pour a specified amount of water into the radiator.
2. Set a radiator tester (1) and an adaptor (2) and raise the water
pressure to the specified pressure.
3. Check the radiator for water leaks.
4. For water leak from the pinhole, repair with the radiator cement.
When water leak is excessive, replace the radiator.
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(4) Fuel System
Resistance of Throttle Body
1. Disconnect the connector.
2. Measure the resistance between terminal
1 and terminal 4 with
an ohmmeter.
3. If the resistance is 0 ohm or infinity, replace it.
4. Measure the resistance between terminal
2 and terminal 3 with
an ohmmeter.
5. If the resistance is not with in the factory specifications, replace
it.
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Pressure falling time Factory specification
More than 10 seconds
for pressure fall from
90 to 60 kPa
from 0.9 to 0.6 kgf/cm
2
from 10 to 9 psi
(1) Radiator Tester (2) Adaptor
Radiator water leakage
test pressure
Factory specification
No leak at specified
pressure
(1) Radiator Tester (2) Adaptor
Resistance
Factory
specifica-
tion
Terminal 1 –
Terminal 2
Continuity
Terminal 3 –
Terminal 4
Continuity
(1) Terminal 1
(2) Terminal 2
(3) Terminal 3
(4) Terminal 4
(5) Terminal 5
(6) Terminal 6
KiSC issued 07, 2015 A