Daewoo MATIZ - Page 20

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