Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1998 1998 Service Manual ENGINE SECTION ON-CAR SERVICES MSA5TCD98L20852

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2-2 [W4A1] SERVICE PROCEDURE
4. Engine Compression

4. Engine Compression 2. 2500 cc MODEL
CAUTION:
A: MEASUREMENT After warming-up, engine becomes very hot.
1. 2200 cc MODEL Be careful not to burn yourself during mea-
surement.
1) After warming-up the engine, turn ignition
switch to OFF. 1) After warming-up the engine, turn ignition
2) Make sure that the battery is fully charged. switch to OFF.
3) Remove all the spark plugs. 2) Make sure that the battery is fully charged.
4) Disconnect connectors from fuel injectors. 3) Remove all the spark plugs. and
4) Disconnect connectors from fuel injectors.
6) Check the starter motor for satisfactory perfor-
5) Fully open throttle valve.
mance and operation.
6) Check the starter motor for satisfactory perfor-
7) Hold the compression gauge tight against the mance and operation.
spark plug hole. 7) Hold the compression gauge tight against the
CAUTION: spark plug hole.
When using a screw-in type compression CAUTION:
gauge, the screw (put into cylinder head spark When using a screw-in type compression
plug hole) should be less than 18 mm (0.71 in) gauge, the screw (put into cylinder head spark
long. plug hole) should be less than 18 mm (0.71 in)
8) Crank the engine by means of the starter motor, long.
and read the maximum value on the gauge when 8) Crank the engine by means of the starter motor,
the pointer is steady. and read the maximum value on the gauge when
the pointer is steady.

G2M0098
B2M0752A
9) Perform at least two measurements per
cylinder, and make sure that the values are correct. 9) Perform at least two measurements per
cylinder, and make sure that the values are correct.
Compression (200 -- 300 rpm and fully open
throttle): Compression (350 rpm and fully open
Standard; throttle):
1,079 -- 1,275 kPa (11.0 -- 13.0 kg/cm2, Standard;
156 -- 185 psi) 1,216 kPa (12.4 kg/cm2, 176 psi)
Limit; Limit;
883 kPa (9.0 kg/cm2, 128 psi) 941 kPa (9.6 kg/cm2, 137 psi)
Difference between cylinders;
Difference between cylinders;
49 kPa (0.5 kg/cm2, 7 psi), or less
196 kPa (2.0 kg/cm2, 28 psi)

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