Daewoo Nubira. Manual — part 146

1C – 18

I

DOHC ENGINE MECHANICAL

DAEWOO V–121 BL4

50. Disconnect the fuel return line at the fuel pressure

regulator.

51. Disconnect the fuel feed line at the fuel rail.
52. Remove the generator adjusting bracket retaining

bolt and the bracket.

53. Disconnect the coolant hose at the rear cylinder

head and ignition coil exhaust gas recirculation
(EGR) bracket.

54. Disconnect the surge tank coolant hose at the

throttle body.

55. Remove the fuel rail assembly. Refer toSection 1F,

Engine Controls.

56. Remove the generator–to–intake manifold support

bracket bolts at the cylinder head and the intake
manifold.

57. Remove the generator support bracket.
58. Remove the intake manifold–to–generator strap

bracket bolt and loosen the bolt on the generator.

59. Move the strap clear of the intake manifold.
60. Remove the evaporative emission canister purge

solenoid bracket bolt and move the bracket clear.

61. Disconnect the throttle cable at the throttle body

and the intake manifold.

62. Loosen all of the cylinder head bolts gradually and

in the sequence shown.

63. Remove the cylinder head bolts.
64. Remove the cylinder head with the intake manifold

and the exhaust manifold attached.

Notice : Prevent any engine oil or coolant from entering
the cylinders when removing the cylinder head.

65. Remove the cylinder head gasket.

DOHC ENGINE MECHANICAL 1C – 19

DAEWOO V–121 BL4

Cleaning Procedure

1. Clean the gasket surfaces of the cylinder head and

the engine block.

2. Make sure the gasket surfaces of the cylinder head

and the engine block are free of nicks and heavy
scratches.

3. Clean the cylinder head bolts.
4. Inspect the cylinder head for warpage. Refer to

”Cylinder Head and Valve Train Components” in
this section.

Installation Procedure

1. Install the cylinder head gasket.
2. Install the cylinder head with the intake manifold

and the exhaust manifold attached.

3. Install the cylinder head bolts.
4. Tighten the cylinder head bolts gradually and in the

sequence shown.

Tighten

Tighten the cylinder head bolts to 25 N

S

m (18 lb–ft)

and turn the bolts another 3 turns of 90 degrees using
the angular torque gauge KM–470–B.

5. Connect the throttle cable at the throttle body and

the intake manifold.

6. Install the generator–to–intake manifold support

bracket.

7. Install the intake generator–to–manifold support

bracket bolts.

Tighten

Tighten the generator–to–intake manifold support
bracket bolts to the intake manifold to 35 N

S

m (26 lb–

ft).

8. Install the intake manifold support bracket bolt to

the generator.

Tighten

Tighten the intakemanifold support bracket bolt at the
generator to 20 N

S

m (15 lb–ft).

9. Connect the surge tank coolant hose at the throttle

body.

10. Connect the coolant hose to the rear cylinder head

and ignition coil EGR bracket.

1C – 20

I

DOHC ENGINE MECHANICAL

DAEWOO V–121 BL4

11. Connect the fuel feed line at the fuel rail.
12. Connect the fuel return line at the fuel rail.
13. Connect all of the necessary vacuum hoses.
14. Install the fuel rail assembly. Refer to Section 1F,

Engine Controls (DOHC).

15. Install the auxiliary catalytic converter nuts at the

exhaust manifold flange.

Tighten

Tighten the auxiliary catalytic converter–to–exhaust
manifold nuts to 40 N

S

m (30 lb–ft).

16. Install the rear timing belt cover.
17. Install the rear timing belt cover bolts.

Tighten

Tighten the rear timing belt cover bolts to 6 N

S

m (53

lb–in).

18. Install the engine mount and retaining bolts.

Tighten

Tighten the engine mount retaining bolts to 60 N·m
(44 lb–ft).

19. Install the timing belt automatic tensioner.
20. Install the timing belt automatic tensioner bolt.

Tighten

Tighten the timing belt automatic tensioner bolts to 25
N

S

m (18 lb–ft).

21. Install the timing belt idler pulleys.
22. Install the timing belt idler pulley nuts.

Tighten

Tighten the timing belt idler pulley bolt to 25 N

S

m (18

lb–ft).

Tighten

Tighten the timing belt idler pulley nut to 25 N

S

m (18

lb–ft).

DOHC ENGINE MECHANICAL 1C – 21

DAEWOO V–121 BL4

23. Install the camshaft gears with the timing marks at

the front.

24. Insert the guide pin of the intake camshaft into the

”IN” bore.

25. Insert the guide pin of the exhaust camshaft into

the ”EX” bore.

26. Install the camshaft gears by counterholding on the

hex of the camshaft with an open–ended wrench.

27. Install the camshaft gear with a new bolt to the

camshaft.

Tighten

Tighten the intake camshaft gear bolt to 50 N

S

m (37

lb–ft). Using the angular torque gauge KM–470–B,
tighten the bolt another 60 degrees plus 15 degrees.

28. While holding the exhaust camshaft firmly in place,

install the exhaust camshaft gear bolt.

Tighten

Tighten the exhaust camshaft gear bolt to 50 N

S

m (37

lb–ft). Using the angular torque gauge KM–470–B,
tighten the bolt another 60 degrees plus 15 degrees.

29. Apply a small amount of gasket sealant to the cor-

ners of the front camshaft caps and to the top of
the rear valve cover–to–cylinder head seal.

30. Install the valve cover and the valve cover gasket.
31. Install the valve cover washers.
32. Install the valve cover bolts.

Tighten

Tighten the valve cover bolts to 8 N·m (71 lb–in).