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Daewoo Matiz (2003 year). Manual - part 3

1A – 10 GENERAL ENGINE INFORMATION

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

Lowered function of the oil
pump.

Replace the pump.

System

Abrasion or damage of the
oil pump relief valve.

Replace the valve.

Engine Noise

Valve Noise

Inadequate valve clearance.

Adjust the valve clearance.

Abrasion of valve stem or
guide.

Replace the valve stem or
the guide.

Weak valve spring.

Replace the spring.

Piston, Ring,
Cylinder Noise

Abrasion of the piston, the
ring or the cylinder.

Boring the cylinder or
replace the piston, the ring
or the cylinder.

Connecting Rod
Noise

Abrasion of the connecting
rod bearing.

Replace the bearing.

Loosened the connecting rod
nut.

Tighten to the specified
torque.

Crankshaft
Noise

Abrasion of the crankshaft
bearing.

Replace the bearing.

Abrasion of the crankshaft
journal.

Grind or replace the
crankshaft journal.

Loosened bearing cap bolt.

Tighten to the specified
torque.

Excessive clearance of the
crankshaft thrust bearing.

Adjust or replace.

Low oil pressure.

Refer to “Low Oil Pressure”
in this section.

GENERAL ENGINE INFORMATION 1A – 11

CHECKING ENGINE FLUID LEVEL

Check the engine fluid level or condition. If needed, refill
or replace the oil.

Check the engine oil level within engine normal operat-
ing temperature as follows ;

1. After stopping the engine, wait for a few minutes to

accumulate oil into the oil pan.

2. After pulling out the oil level gauge (a), check the oil

level.

3. Clean the oil level gauge and insert the gauge into

guide.

4. After pulling out the oil level gauge again, recheck the

oil level and insert the gauge into guide again.

Important: Oil level should be between “MIN” mark and
“MAX” mark.

5. If oil level is below the “MIN” mark, refill engine oil as

much as the demanded quantify.

Important: If checking oil level under the engine cold
condition, oil is not accumulated into oil pan quickly and
correct level checking can not be performed. Therefore,
wait until temperature reaches the normal operating
condition and check the engine oil level.

D102A301

CHANGING ENGINE OIL OR OIL
FILTER

Tools Required

09915–47341 Oil Filter Wrench.

When checking engine oil level or condition, if needed,
change engine oil (including the filter) as follows ;

1. After stopping the engine, wait for a few minutes to

accumulate oil into the oil pan.

2. Remove the oil filter cap (b).

3. Remove the oil drain plug (c) and draw oil off.

D102A302

4. After drawing oil completely, tighten the oil drain plug

to 30–40 N

m (22–30 lb-ft).

5. Replace the oil filter using the oil filter wrench

09915–47341 (d).

Remove the air cleaner/resonator/snorkel as-
sembly.

After removing the bolts, remove the heat
shield.

Loosen the power steering pump cap screw and
pull the power steering hose into the front.

Remove the oil filter.

Important: Whenever changing engine oil, replace the
oil filter. When replacing new oil filter, apply engine oil on
oil filter sealing.

D102A303

1A – 12 GENERAL ENGINE INFORMATION

CHECKING ENGINE TIMING BELT

After checking the timing belt for looseness, crack, wear
or tension, replace the belt if necessary.

CHECKING ACCESSORY BELT

After checking the alternator belt (e), air conditioning/
power steering belt (f), air conditioning belt (g), power
steering belt (h), for looseness, crack, wear or tension,
replace the belt if necessary.

D102A304

CHECKING SPARK PLUG

After checking the spark plug for bad clearance, exces-
sive carbon deposit, worn electrode or damaged insula-
tor, replace the new one if necessary.

Remove and check the spark plug as follows ;

1. Pull the high tension cable cap portion (i), and discon-

nect the high tension cable from the spark plug.
If pulling the high tension cable (j), circuit could be
disconnected. Therefore, the cap portion should be
used.

D102A305

2. Remove the spark plugs from cylinder head using a

wrench.

3. Measure the spark plug clearance (k) with the filler

gauge. If measured value is not within the specified
value, adjust the grounding electrode.

When installing new spark plug, check the clearance
for equality and install it.

D102A306

GENERAL ENGINE INFORMATION 1A – 13

CHECKING AIR CLEANER ELEMENT

If the air cleaner element becomes dirty, engine efficien-
cy could be deteriorated.

Be sure to check the element often.

Especially, if a vehicle frequently runs on a dusty road,
check and replace the element often.

CHECKING FUEL FILTER

If fuel filter is used over the specified period, engine effi-
ciency is deteriorated by dust or foreign material.

Therefore, replace a new one within the specified peri-
od.

CHECKING FUEL SYSTEM

Check the fuel system as follows ;

Check the fuel line or line connection portion for dam-
age or leakage.

Check the fuel hose surface for damage.

Check the fuel cap for looseness.

CHECKING HOSE SYSTEM

Check the engine vacuum hose, PCV hose or canister
hose as follows ;

Check the hose surface for damage by heat or ma-
chine.

Check the hose for hardening, crack, tear, or coming
off.

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