Daewoo MATIZ Service Manual page 20

1A – 10 GENERAL ENGINE INFORMATION
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Condition
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Low Oil Pressure
Engine Noise
GENERAL DIAGNOSIS (Cont'd)
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D Lowered function of the oil
Malfunction of
pump.
Lubrication
System
D Abrasion or damage of the
oil pump relief valve.
D Inadequate valve clearance.
Valve Noise
D Abrasion of valve stem or
guide.
D Weak valve spring.
D Abrasion of the piston, the
Piston, Ring,
ring or the cylinder.
Cylinder Noise
D Abrasion of the connecting
Connecting Rod
rod bearing.
Noise
D Loosened the connecting rod
nut.
D Abrasion of the crankshaft
Crankshaft
bearing.
Noise
D Abrasion of the crankshaft
journal.
D Loosened bearing cap bolt.
D Excessive clearance of the
crankshaft thrust bearing.
D Low oil pressure.
Probable cause
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Correction
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D Replace the pump.
D Replace the valve.
D Adjust the valve clearance.
D Replace the valve stem or
the guide.
D Replace the spring.
D Boring the cylinder or
replace the piston, the ring
or the cylinder.
D Replace the bearing.
D Tighten to the specified
torque.
D Replace the bearing.
D Grind or replace the
crankshaft journal.
D Tighten to the specified
torque.
D Adjust or replace.
D Refer to "Low Oil Pressure"
in this section.
DAEWOO M-150 BL2