Daewoo CIELO EURO III Manual
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DAEWOO T-154 BL2,3
SECTION 1
ENGINE CIELO EURO III
SECTION 1A
GENERAL ENGINE INFORMATION
TABLE OF CONTENTS
Diagnosis 1A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compression Test 1A-1. . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Test 1A-2. . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Leak Diagnosis 1A-3. . . . . . . . . . . . . . . . . . . . . . . .
Knock Diagnosis 1A-4. . . . . . . . . . . . . . . . . . . . . . . . . .
Noise Diagnosis 1A-8. . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information 1A-11. . . . . . . . . . . . . . . . . . . . . . .
Cleanliness and Care 1A-11. . . . . . . . . . . . . . . . . . . . .
On-Engine Service 1A-11. . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS
COMPRESSION TEST
Important: Disconnect the Crankshaft Position (CKP)
Sensor connector to disable the fuel and the ignition
systems.
Test the compression pressure for each cylinder. Low
compression pressure may be the fault of the valves or
the pistons. The following conditions should be consid-
ered when you check the cylinder compression:
D The engine should be at normal operating tempera-
ture.
D The throttle must be wide open.
D All the spark plugs should be removed.
D The battery must be at or near full charge.
1. Place approximately three squirts of oil from a plung-
er-type oiler into each spark plug port.
2. Insert the engine compression gauge into each spark
plug port.
3. Crank test each cylinder with four to five compression
strokes using the starter motor.
4. The lowest reading should not be less than 70% of
the highest reading. The compression gauge reading
should not be less than 689 kPa (100 psi) for any of
the cylinders.
5. Examine the gauge readings obtained after the four
‘‘puffs’’ per cylinder are obtained from cranking the
starter motor. The readings are explained in the follow-
ing descriptions:
D Normal Condition – Compression builds up quickly
and evenly to the specified compression on each cylin-
der.
D Piston Rings Faulty – Compression is low on the first
stroke and tends to build up on following strokes, but
the compression pressure does not reach normal. The
compression pressure improves considerably with the
addition of oil into the cylinder.
D Valves Faulty – Low compression pressure on the
first stroke. The compression pressure does not tend
to build up on the following strokes. The compression
pressure does not improve much with the addition of
oil into the cylinder.