(1) Insert a compression gauge into the spark plug hole.
(2)
Open the throttle up fully.
(3) Crank the engine with the starter to measure the
compression pressure.
Standard: 1225 kPa (12.5 kgflcm2) 1178 psi]
Limit: 883 kPa (9.0 kgflcm2) 1128 psi]
Caution:
In order to maintain the engine speed to more than 250 rpm,
use a fully charged battery.
(4) Carry out the above operations
(1)
to (3) on every
cylinder, and inspect the pressure difference.
Limit
Pressure difference between cylinders:
98
kPa (1
.O
kgflcm2) 114 psi]
(5)
If some cylinders have a compression pressure less than
the limit, or if their pressure differences are more than the
limit, add a small amount of engine oil from the spark plug
hole, and repeat the above operations (1) to (3).
(a) If the pressure goes up by adding oil, there may be
wear or damage to the piston ring and the cylinder
wall.
(b) If the pressure remains low even if oil is added, there
may be a burnout of the valve, defect in valve
contact, or pressure leak from the gasket.
5.
Connect the distributor connector.
6.
Install the spark plugs.
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