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MECHANICAL
2. Compression
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself during measure-
ment.
1) Remove the collector cover.
2) After warming-up the engine, turn the ignition
switch to OFF.
3) Make sure that the battery is fully charged.
4) Release
the
fuel
FU(H4DOTC)-39, RELEASING OF FUEL PRES-
SURE, PROCEDURE, Fuel.>
5) Remove all the spark plugs.
<Ref. to IG(H4DOTC)-4, REMOVAL, Spark Plug.>
6) Fully open the throttle valve.
7) Check the starter motor for satisfactory perfor-
mance and operation.
8) Hold the compression gauge tightly against the
spark plug hole.
NOTE:
When using a screw-in type compression gauge,
the screw (put into cylinder head spark plug hole)
should be less than 18 mm (0.71 in) long.
9) Crank the engine by means of the starter motor,
and read the maximum value on the gauge when
the gauge needle is steady.
10) Perform at least two measurements per cylin-
der, and make sure that the values are correct.
Compression (Throttle fully open):
Standard
1,100 — 1,300 kPa (11.2 — 13.3 kgf/cm
160 — 189 psi)
Difference between cylinders
49 kPa (0.5 kgf/cm
Compression
pressure.
<Ref.
ME-00007
2
2
, 7 psi) or less
ME(H4DOTC)-22
to
,
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