Daewoo Nubira. Manual - part 150

1C – 34

I

DOHC ENGINE MECHANICAL

DAEWOO V–121 BL4

Installation Procedure

1.  Align the timing mark on the crankshaft gear with

the notch on the bottom of the rear timing belt cov-
er.

2.  Align the timing marks on the camshaft gears, us-

ing the intake gear mark for the intake gear and the
exhaust gear mark for the exhaust gear.

3.  Install the timing belt.

DOHC ENGINE MECHANICAL  1C – 35

DAEWOO V–121 BL4

4.  Turn the hex–key tab in a clockwise direction to

tension the belt. Turn until the pointer aligns with
the notch.

5.  Install the automatic tensioner bolt.

Tighten

Tighten the automatic tensioner bolt to 25 N

S

m (18 lb–

ft).

6.  Rotate the crankshaft two full turns clockwise using

the crankshaft pulley bolt.

7.  Recheck the automatic tensioner pointer.

8.  Install the front timing belt cover.
9.  Install the front timing belt cover bolts.

Tighten

Tighten the front timing belt cover bolts to 6 N

S

m (53

lbin).

10.  Install the right engine mount bracket. Refer to ”En-

gine Mounts” in this section.

11.  Install the crankshaft pulley.
12.  Install the crankshaft pulley bolts.

Tighten

Tighten the crankshaft pulley bolts to 20 N

S

m (15 lb–

ft).

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I

DOHC ENGINE MECHANICAL

DAEWOO V–121 BL4

13.  Install the serpentine accessory drive belt. Refer to

Section 2E, Tires and Wheels.

14.  Install the right front splash shield.
15.  Install the right front wheel. Refer to Section 6B,

Power Steering Pump.

16.  Install the air filter housing.
17.  Install the air filter housing bolts.

Tighten

Tighten the air filter housing bolts to 8 N

S

m (71 lb–in).

18.  Connect the air intake tube to the throttle body.
19.  Connect the breather tube to the valve cover.
20.  Connect the intake air temperature sensor connec-

tor.

21.  Connect the negative battery cable.

OIL PAN

Removal Procedure

1.  Disconnect the negative battery cable.
2.  Drain the engine oil from the engine crankcase.
3.  Disconnect the post–converter heated oxygen sen-

sor.

4.  Remove the auxiliary catalytic converter upper

flange nuts from the exhaust manifold and the sup-
port bracket bolts.

5.  Remove the front muffler pipe retaining nuts from

the main catalytic converter.

6.  Remove both catalytic converters as a unit.

DOHC ENGINE MECHANICAL  1C – 37

DAEWOO V–121 BL4

7.  Remove the oil pan flange–to–transaxle retaining

bolts.

8.  Remove the oil pan retaining bolts.
9.  Remove the oil pan from the engine block.

Cleaning Procedure

1.  Clean the oil pan sealing surface.
2.  Clean the engine block sealing surface.
3.  Clean the oil pan retaining bolts.
4.  Clean the oil pan attaching bolt holes in the engine

block.

5.  Clean the oil pan splash shield.