2004 DAEWOO LACETTI spark plugs

1.8L DOHC ENGINE MECHANICAL 1C2 – 15
DAEWOO V–121 BL4
25. Remove the front timing belt cover bolts.
26. Remove the front timing belt cover.
27. Remove the timing belt. Refer to Timing Belt” in this
section.
28. Disconnect the breather tube at the camshaft cov-
er.
29. Remove the spark plug cover bolts.
30. Remove the spark plug cover.
31. Disconnect the ignition wires from the spark plugs.
32. Remove the camshaft cover bolts.
33. Remove the camshaft cover and the camshaft cov-
er gasket.
Notice : Take extreme care to prevent any scratches,
nicks or damage to the camshafts.
34. While holding the intake camshaft firmly in place,
remove the intake camshaft gear bolt.
35. Remove the intake camshaft gear.
36. While holding the exhaust camshaft firmly in place,
remove the exhaust camshaft gear bolt.
37. Remove the exhaust camshaft gear.
38. Remove the timing belt automatic tensioner bolts.
39. Remove the timing belt automatic tensioner.

1C2 – 20I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
Tighten
Tighten the exhaust camshaft gear bolt to 50 NSm (37
lb–ft) turn the bolt another 60 degrees and 15 degrees
using the angular torque gauge.
29. Apply a small amount of gasket sealant to the cor-
ners of the front camshaft caps and to the top of
the rear camshaft cover–to–cylinder head seal.
30. Install the camshaft cover and the camshaft cover
gasket.
31. Install the camshaft cover washers.
32. Install the camshaft cover bolts.
Tighten
Tighten the camshaft cover bolts to 8 NSm (71 lb–in).
33. Connect the ignition wires to the spark plugs.
34. Install the spark plug cover.
35. Install the spark plug cover bolts.
Tighten
Tighten the spark plug cover bolts to 8 NSm (71 lb–in).
36. Connect the breather tube to the camshaft cover.
37. Align the timing marks on the camshaft gears to the
notches on the camshaft cover, using the intake
gear mark for the intake gear and the exhaust gear
mark for the exhaust gear.
38. Align the mark on the crankshaft gear with the
notch at the bottom of the rear timing belt cover.

1C2 – 22I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
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.

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 – 43
DAEWOO V–121 BL4
CAMSHAFT GEARS
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the timing belt. Refer to ”Timing Belt” in
this section.
3. Remove the spark plug cover bolts.
4. Remove the spark plug cover.
5. Disconnect the ignition wires from the spark plugs.
6. Disconnect the breather tubes from the camshaft
cover.
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.
Installation Procedure
Notice : Take extreme care to prevent any scratches,
nicks or damage to the camshafts.
1. Install the intake camshaft gear.
2. 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 – 44I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
3. Install the exhaust camshaft gear.
4. 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.
5. Apply a small amount of gasket sealant to the cor-
ners of the front camshaft caps and to the top of
the rear camshaft cover–to–cylinder head seal.
6. Install the camshaft cover and the camshaft cover
gasket.
7. Install the camshaft cover washers.
8. Install the camshaft cover bolts.
Tighten
Tighten the camshaft cover bolts to 8 NSm (71 lb–in).
9. Connect the crankcase breather tubes to the cam-
shaft cover.
10. Connect the ignition wires to the spark plugs.
11. Install the spark plug cover.
12. Install the spark plug cover bolts.
Tighten
Tighten the spark plug cover bolts to 8 NSm (71 lb–in).
13. Install the timing belt. Refer to ”Timing Belt” in this
section.
14. Connect the negative battery cable.
REAR TIMING BELT COVER
Tools Required
KM–470–B Angular Torque Gauge
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the timing belt. Refer to ”Timing Belt” in
this section.
3. Remove the camshaft gears. Refer to ”Camshaft
Gears” in this section.
4. Remove the timing belt automatic tensioner bolt.
5. Remove the timing belt automatic tensioner.

1.8L DOHC ENGINE MECHANICAL 1C2 – 57
DAEWOO V–121 BL4
15. Remove the direct ignition system (DIS) coil and
the exhaust gas recirculation (EGR) mounting
bracket bolts.
16. Remove the DIS ignition coil and the EGR mount-
ing bracket and ignition wires.
17. Remove the intake manifold studs.
18. Remove the spark plugs.
19. Remove the camshaft bearing cap bolts gradually
and in the sequence shown for each camshaft cap.
20. Remove the intake camshaft caps. Maintain the
correct positions for installation.
21. Remove the intake camshaft.
22. Remove the intake valve tappet adjusters.
23. Remove the exhaust camshaft caps. Maintain the
correct positions for installation.
24. Remove the exhaust camshaft.
25. Remove the exhaust valve tappet adjusters.
26. Compress the valve springs with the valve spring
compressor KM–348 and the adapter KM–653.
27. Remove the valve retainers.
28. Remove the valve spring compressor KM–348 and
the adapter KM–653.
29. Remove the valve spring caps.
30. Remove the valve springs. Maintain the original
position of the valve springs for installation.

1C2 – 62I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
14. Install the intake camshaft.
15. Install the intake camshaft bearing caps in their
original positions.
16. Install the exhaust camshaft.
17. Install the exhaust camshaft bearing caps in their
original positions.
18. Install the camshaft bearing cap bolts.
19. Tighten the camshaft bearing 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).
20. Install the spark plugs.
Tighten
Tighten the spark plugs to 20 NSm (15 lb–ft).
21. Install the DIS coil and EGR mounting bracket.
22. Install the DIS coil and EGR mounting bracket
bolts.
Tighten
Tighten the direct ignition system coil and exhaust
gas recirculation mounting bracket bolts to 25 NSm
(18 lb–ft).
23. Install the intake manifold studs.
24. Install the intake manifold gasket.
25. Install the intake manifold.
26. Install the intake manifold retaining nuts and retain-
ing bolt in the sequence shown.
Tighten
Tighten the intake manifold retaining nuts and retain-
ing bolt to 22 NSm (16 lb–ft).
27. Install the fuel rail assembly. Refer to Section 1F,
Engine Controls.
28. Install the thermostat housing assembly.
29. Install the thermostat housing mounting bolts.
Tighten
Tighten the thermostat housing mounting bolts to 15
NSm (11 lb–ft).
30. Install the coolant bypass housing and mounting
bolts.
Tighten
Tighten the coolant bypass housing bolts to 15 NSm
(11 lb–ft).