DAEWOO LACETTI 2004 Service Repair Manual

1.8L DOHC ENGINE MECHANICAL 1C2 – 21
DAEWOO V–121 BL4
39. Install the timing belt.
40. Check and adjust the timing belt tension. Refer to
”Timing Belt Check and Adjust” in this section.
41. Install the front timing belt cover.
42. Install the front timing belt cover bolts.
Tighten
Tighten the front timing belt cover bolts to 6 NSm (53
lb–in).
43. Install the crankshaft pulley.
44. Install the crankshaft pulley bolts.
Tighten
Tighten the crankshaft pulley bolts to 12 NSm (106 lb–
in).
45. Install the right engine mount bracket and retaining
bolts.
Tighten
Tighten the engine mount bracket retaining bolts to 55
NSm (41 lb–ft).
46. Remove the engine assembly lift support
J–28467–B.
47. Install the serpentine accessory drive belt. Refer to
Section 6B, Power Steering Pump.
48. Connect the upper radiator hose to the thermostat
housing.
49. Install the right front wheel well splash shield.
50. Install the right front wheel. Refer to Section 2E,
Tires and Wheels.
51. Install the air cleaner housing.
52. Install the air cleaner housing bolts.
Tighten
Tighten the air cleaner housing bolts to 10 NSm (89 lb–
in).
53. Connect the air cleaner outlet hose to the throttle
body.
54. Connect the breather tube to the camshaft cover.
55. Connect the MAT sensor connector.

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56. Connect the CTS connector.
57. Connect the engine CTS connector.
58. Connect the IAC valve connector.
59. Connect the TPS connector.
60. Install the CCP and the EGR solenoid bracket bolt.
Tighten
Tighten the charcoal canister purge and exhaust gas
recirculation solenoid bracket bolt to 5 NSm (44 lb–in).
61. Connect the DIS coil connector.
62. Connect the O2 sensor connector, if equipped.
63. Connect the ECM ground terminal.
64. Install the fuel pump fuse.
65. Connect the negative battery ground cable.
66. Refill the engine cooling system. Refer to Section
1D, Engine Cooling.
CAMSHAFTS
Removal Procedure
1. Remove the timing belt. Refer to ”Timing Belt” in
this section.
2. Disconnect the breather tube at the camshaft cov-
er.
3. Disconnect the engine ventilation hose at the cam-
shaft cover.
4. Remove the spark plug cover bolts.
5. Remove the spark plug cover.
6. Disconnect the ignition wires from the spark plugs.
7. Remove the camshaft cover bolts.
8. Remove the camshaft cover washers.
9. Remove the camshaft cover and the camshaft cov-
er gasket.
Notice : Take extreme care to prevent any scratches,
nicks or damage to the camshafts.
10. While holding the intake camshaft firmly in place,
remove the intake camshaft gear bolt.
11. Remove the intake camshaft gear.
12. While holding the exhaust camshaft firmly in place,
remove the exhaust camshaft gear bolt.
13. Remove the exhaust camshaft gear.

1.8L DOHC ENGINE MECHANICAL 1C2 – 23
DAEWOO V–121 BL4
14. Loosen the camshaft bearing cap bolts in stages of
one–half to one turn.
15. Remove the camshaft bearing cap bolts from the
cylinder head.
16. Remove the camshafts.
17. Remove the seal ring from the camshafts.
Important : The camshaft must detach evenly from the
bearing seats in the front guide bearing.
18. Check the camshaft and bearing seats for wear and
replace them if necessary.
Installation Procedure
Notice : Take extreme care to prevent any scratches,
nicks or damage to the camshafts.
1. Lubricate the camshaft journals and the camshaft
caps with engine oil.
2. Install the intake camshaft.
3. Install the intake camshaft caps in their original
positions.
4. Install the intake camshaft cap bolts.
5. Install the exhaust camshaft.
6. Install the exhaust camshaft caps in their original
positions.
7. Install the exhaust camshaft cap bolts.
8. Tighten the camshaft cap bolts gradually and in the
sequence shown for each camshaft cap.
Tighten
Tighten the camshaft bearing cap bolts to 8 NSm (71
lb–in).
9. Measure the intake camshaft end play and the ex-
haust camshaft end play. Refer to ”Engine Specifi-
cations” in this section.
10. Install the intake camshaft gear.
11. While holding the intake camshaft firmly in place,
install the intake camshaft gear bolt.
Tighten
Tighten the intake camshaft gear bolt to 50 NSm (37
lb–ft) plus 60 degrees and 15 degrees using the angu-
lar torque gauge KM–470–B.

1C2 – 24I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
12. Install the exhaust camshaft gear.
13. While holding the exhaust camshaft firmly in place,
install the exhaust camshaft gear bolt.
Tighten
Tighten the exhaust camshaft gear bolt to 50 NSm (37
lb–ft) plus 60 degrees and 15 degrees using the angu-
lar torque gauge KM–470–B.
14. Install the camshaft cover and the camshaft cover
gasket.
15. Install the camshaft cover washers.
16. Install the camshaft cover bolts.
Tighten
Tighten the camshaft cover bolts to 8 NSm (71 lb–in).
17. Connect the ignition wires to the spark plugs.
18. Install the spark plug cover.
19. Install the spark plug cover bolts.
Tighten
Tighten the spark plug cover bolts to 8 NSm (71 lb–in).
20. Connect the breather tube to the camshaft cover.
21. Connect the engine ventilation hose to the cam-
shaft cover.
22. Install the timing belt. Refer to ”Timing Belt” in this
section.
TIMING BELT CHECK AND ADJUST
(Left–Hand Drive Shown, Right–Hand Drive
Similar)
Adjustment Procedure
1. Disconnect the negative battery cable.
2. Disconnect the manifold air temperature (MAT)
sensor connector.
3. Remove the air cleaner outlet hose from the throttle
body.
4. Remove the breather tube from the camshaft cover.

1.8L DOHC ENGINE MECHANICAL 1C2 – 25
DAEWOO V–121 BL4
5. Remove the air cleaner housing bolts.
6. Remove the air cleaner housing.
7. Remove the right front wheel. Refer to Section 2E,
Tires and Wheels.
8. Remove the right front wheel well splash shield.
9. Remove the serpentine accessory drive belt. Refer
to Section 6B, Power Steering Pump.
10. Remove the crankshaft pulley bolts.
11. Remove the crankshaft pulley.
12. Remove the right engine mount bracket. Refer to
”Engine Mount” in this section.
13. Remove the front timing belt cover bolts.
14. Remove the front timing belt cover.
15. Rotate the crankshaft at least one full turn clock-
wise using the crankshaft gear bolt.
16. Align the mark on the crankshaft gear with the
notch at the bottom of the rear timing belt cover.

1C2 – 26I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
17. Align the camshaft gear timing marks. Use the ex-
haust gear mark for the exhaust gear and the in-
take gear mark for the intake gear, since the gears
are interchangeable
18. Loosen the automatic tensioner bolt. To relieve the
belt tension, turn the hex–key tab counterclockwise.
19. Rotate the automatic tensioner hex–key tab clock-
wise until the adjust arm pointer of the timing belt
automatic tensioner is aligned with the notch in the
timing belt automatic tensioner bracket.
20. Tighten the automatic tensioner bolt.
21. Rotate the crankshaft two full turns clockwise using
the crankshaft gear bolt.
22. Check the automatic tensioner pointer.
23. When the adjust arm pointer of the timing belt auto-
matic tensioner is aligned with the notch on the tim-
ing belt automatic tensioner bracket, the belt is ten-
sioned correctly.
Tighten
Tighten the automatic tensioner bolt to 25 NSm (18 lb–
ft).

1.8L DOHC ENGINE MECHANICAL 1C2 – 27
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24. Install the front timing belt cover.
25. Install the front timing belt cover bolts.
Tighten
Tighten the front timing belt cover bolts to 6 NSm (53
lb–in).
26. Install the crankshaft pulley.
27. Install the crankshaft pulley bolt.
Tighten
Tighten the crankshaft pulley bolt to 20 NSm (15 lb–ft).
28. Install the right engine mount bracket. Refer to ”En-
gine Mount” in this section.
29. Install the serpentine accessory drive belt. Refer to
Section 6B, Power Steering Pump.
30. Install the right front wheel well splash shield.
31. Install the right front wheel. Refer to Section 2E,
Tires and Wheels.
32. Install the air cleaner housing.
33. Install the air cleaner housing bolts.
Tighten
Tighten the air cleaner housing bolts to 10 NSm (89 lb–
in).
34. Connect the air cleaner outlet hose to the throttle
body.
35. Connect the breather tube to the camshaft cover.
36. Connect the MAT sensor connector.
37. Connect the negative battery cable.

1C2 – 28I1.8L DOHC ENGINE MECHANICAL
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TIMING BELT
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the manifold air temperature (MAT)
sensor connector.
3. Disconnect the air cleaner outlet hose from the
throttle body.
4. Disconnect the breather tube from the camshaft
cover.
5. Remove the air cleaner housing bolts.
6. Remove the air cleaner housing.
7. Remove the right front wheel. Refer to Section 2E,
Tires and Wheels.
8. Remove the right front wheel well splash shield.
9. Remove the serpentine accessory drive belt. Refer
to Section 6B, Power Steering Pump.
10. Remove the crankshaft pulley bolts.
11. Remove the crankshaft pulley.
12. Remove the right engine mount bracket. Refer to
”Engine Mount” in this section.
13. Remove the front timing belt cover bolts.
14. Remove the front timing belt cover.

1.8L DOHC ENGINE MECHANICAL 1C2 – 29
DAEWOO V–121 BL4
15. Using the crankshaft gear bolt, rotate the crank-
shaft clockwise until the timing mark on the crank-
shaft gear is aligned with the notch at the bottom of
the rear timing belt cover.
Notice : The camshaft gears must align with the notch on
the camshaft cover or damage to the engine could result.
16. Align the camshaft gears with the notch on the
camshaft cover.
Important : Use the intake gear mark for the intake cam-
shaft gear and the exhaust gear mark for the exhaust cam-
shaft gear since both gears are interchangeable.
17. Remove the timing belt.
18. Loosen the automatic tensioner bolt. Turn the hex–
key tab to relieve belt tension.
Installation Procedure
1. Align the timing mark on the crankshaft gear with
the notch on the bottom of the rear timing belt cov-
er.

1C2 – 30I1.8L DOHC ENGINE MECHANICAL
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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.
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 NSm (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 NSm (53
lb–in).
10. Install the right engine mount bracket. Refer to ”En-
gine Mounts” in this section.