### Camshaft

#### REMOVAL AND INSTALLATION

##### 1.6L (GA16DE) Engine

CAUTION
Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure to do so may result in fire or personal injury.

1. Disconnect the negative battery cable, drain the cooling system, and relieve the fuel system pressure.

   Fig. 1: Installation of camshaft bearing caps — 1.6L (GA16DE) engine

2. Remove all engine drive belts. Disconnect the exhaust pipe from the exhaust manifold.
3. Remove the power steering pulley and pump with the mounting bracket.
4. Remove the cylinder head cover.
5. Remove the distributor assembly.
6. Remove the timing chain tensioners and camshaft sprocket.

   NOTE: Before the camshafts are removed from the cylinder head, note the positioning of the pins at the end of the camshafts for reassembly purposes.

7. Remove the camshaft bearing caps in sequence and remove the camshafts from the cylinder head. Remove the idler sprocket bolt. These parts should be reassembled in their original position.
8. Remove the shims from the tops of the lifters. Be sure to note the position of each shim.
9. Remove the valve lifters from the bores in the cylinder head. Note the positioning of the lifters for reassembly.
10. Measure the diameter of the lifters. The diameter should be 1.1795–1.1801 in. (29.960–29.975mm).
11. Measure the diameter of the lifter bores. The diameter should be 1.1811–1.1819 in. (30.000–30.021mm).
12. Clearance between the lifter and bore should be 0.0010–0.0024 in. (0.025–0.061mm).

    To install:

13. Install the lifters and shims to the cylinder head in the proper locations as noted during removal.

    NOTE: The exhaust and intake camshafts are marked with identification stamps. (E for exhaust and I for intake).

14. Install the camshafts to the cylinder head and position the intake camshaft knock pin at the 9 o'clock position and the exhaust camshaft at the 12 o'clock position.

    Fig. 2: Positioning and identification of camshafts — 1.6L (GA16DE) Engine

15. Install the camshaft bearing caps and tighten the mounting bolts as follows:
    1. Tighten bolts 11 through 15, then bolts 1 through 10 to 18 inch lbs. (2 Nm)
    2. Tighten bolts 1 through 15 to 53 inch lbs. (6 Nm)
    3. Tighten bolts 1 through 14 to 87–105 inch lbs. (10–12 Nm)
    4. Tighten bolt 15 to 56–73 inch lbs. (7–8 Nm)

       NOTE: If any part of the valve train has been has been replaced, the valve adjustment must be checked. DO NOT adjust the valves or rotate the camshafts at this point. Internal engine damage will result.

16. Install the camshaft sprockets with timing chains.
17. Install distributor assembly.
18. Check and adjust the valve clearance.
19. Install the cylinder head cover.
20. Install the remaining components. Refill and check all fluid levels.
21. Connect negative battery cable.
22. Start the engine, check for leaks, and adjust the ignition timing to specification.
23. Road test the vehicle for proper operation.

##### 2.0L (SR20DE) Engine

###### Sentra

1. Disconnect the negative battery cable. Remove the rocker cover and oil separator.
2. Rotate the crankshaft until the No.1 piston is at TDC on the compression stroke. Then rotate the crankshaft until the mating marks on the camshaft sprockets line up with the mating marks on the timing chain.
3. Remove the timing chain tensioner.
4. Remove the distributor.
5. Remove the timing chain guide.
6. Remove the camshaft sprockets. Use a wrench to hold the camshaft while loosening the sprocket bolt.

   Fig. 3: Camshaft bearing cap torque sequence — 2.0L (SR20DE) engines

7. Loosen the camshaft bracket bolts in the opposite order of the tightening sequence.
8. Remove the camshaft.

   To install:

9. Clean the left hand camshaft end bracket and coat the mating surface with liquid gasket. Install the camshafts, camshaft brackets, oil tubes and baffle plate. Ensure the left camshaft key is at 12 o'clock and the right camshaft key is at 10 o'clock.
10. The procedure for tightening camshaft bolts must be followed exactly to prevent camshaft damage. Tighten bolts as follows:
    1. Tighten right camshaft bolts 9 and 10 (in that order) to 1.5 ft. lbs. (2 Nm), then tighten bolts 1–8 (in that order) to the same specification.
    2. Tighten left camshaft bolts 11 and 12 (in that order) to 1.5 ft. lbs. (2 Nm), then tighten bolts 1–10 (in that order) to the same specification.
    3. Tighten all bolts in sequence to 4.5 ft. lbs. (6 Nm).
    4. Tighten all bolts in sequence to 6.5–8.5 ft. lbs. (9–12 Nm) for type A, B and C bolts and 13–19 ft. lbs. (18–25 Nm) for type D bolts.
11. Line up the mating marks on the timing chain and camshaft sprockets and install the sprockets. Tighten sprocket bolts to 101–116 ft. lbs. (137–157 Nm).
12. The remaining components are installed in the reverse order from which they were removed.
13. Connect the negative battery cable. Refill all fluid levels. Road test the vehicle for proper operation.

###### 200SX

CAUTION
Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure to do so may result in fire or personal injury.

1. Release the fuel system pressure and disconnect the negative battery cable.
2. Raise and safely support the vehicle. Remove the engine undercovers.
3. Remove the right front wheel and the engine side cover.
4. Drain the cooling system and remove the radiator assembly.
5. Remove the air duct from the intake manifold.
6. Remove the drive belts and water pump pulley.
7. Remove the alternator and the power steering pump from the engine.
8. Note the locations for reassembly and remove the vacuum hoses, fuel hoses, wires, and the electrical connections.
9. Remove the distributor cap and ignition wires from the engine.
10. Remove all spark plugs.
11. Remove the rocker cover nuts in sequence.
12. Remove the rocker cover and oil separator.
13. Remove the intake manifold supports, oil filter bracket, and the power steering bracket.
14. Rotate the engine and set the No. 1 piston at TDC on the compression stroke. Rotate crankshaft until mating marks on camshaft sprockets are in the correct position.
15. Remove the timing chain tensioner.
16. Matchmark the position of the distributor rotor and housing to the engine block for reinstallation purposes. Unbolt and remove the distributor assembly.
17. Remove the timing chain guide.

    NOTE: Wire the camshaft sprockets to the timing chain to maintain proper timing chain position.

18. Holding the flats of the camshaft sprockets, remove the mounting bolts. Remove the sprockets from the camshafts.

    NOTE: Note the positioning of the pins on the end of the camshafts for installation purposes.

19. Remove the oil tubes, baffle plate, camshaft brackets and the camshafts. It is important that all parts are kept in order for correct installation.

    NOTE: It is essential that the valve train components are kept in specific order for reassembly.

20. Remove the rocker arms, shims, rocker arm guides and the hydraulic lash adjusters.

    NOTE: When the lifters are removed, keep them straight up or soak them in clean engine oil to prevent air from entering them.

21. Measure the diameter of the lifters. The diameter should be 0.6685–0.6690 in. (16.980–16.993mm).
22. Measure the diameter of the lifter bores. The diameter should be 0.6693–0.6701 in. (17.000–17.020mm).
23. Standard clearance between the lash adjuster and the guide hole should be 0.0003–0.0016 in. (0.007–0.040mm).

    To install:

    NOTE: The hydraulic lifters must be bled to remove the air from them. Air can not be bled from this type of lifter by running the engine.

24. Bleed the lifters as follows:
    1. Submerse the lifter into a container of clean engine oil.
    2. While pushing the plunger, insert a thin rod into the check ball and lightly push the check ball.
    3. Air is completely bled when the plunger no longer moves.
25. Check all components for wear, replace as necessary and clean all mating surfaces.

    NOTE: Apply clean engine oil to all components prior to installation. Always replace the rocker arm guide with a new one.

26. At this point it is necessary to perform valve adjustment. Adjust the valves as follows:

    NOTE: It will be necessary to determine the proper shim size when replacing the valve, cylinder head, shim, rocker arm guide, or the valve seat.

27. Insert tool KV10115700 (J38957) with dial gauge into the lifter bore.
28. Before measuring, make sure the following parts are installed in the cylinder head.
    - Valve
    - Valve spring
    - Collet
    - Retainer
    - Rocker arm guide (except shim)
29. On the shim side, measure the difference between contact surfaces of the rocker arm guide and the valve stem end.

    NOTE: When measuring, lightly pull dial indicator rod toward you to eliminate play in tool.

30. Using this reading, select the proper shim size.
31. Shims are available in thickness' from 0.1102–0.1260 in. (2.800–3.200mm) in steps of 0.0010 in. (0.025mm).
32. Measure all the valves and select the proper shim sizes.
33. Remove the tool from cylinder head.
34. Install the valve lifters to the bores in the cylinder head.
35. Install the rocker arm guides, shims, and the rocker arms to the cylinder head.
36. Clean the left hand camshaft end bracket and coat the mating surface with liquid gasket. Install the camshafts, camshaft brackets, oil tubes, and the baffle plate.

    WARNING
    Ensure that the left camshaft key is at the 12 o'clock position and the right camshaft key is also at the 12 o'clock position.

37. The procedure for tightening camshaft bolts must be followed exactly to prevent camshaft damage. Tighten bolts as follows:
    1. Tighten the right camshaft bolts No. 9 and 10 (in that order) to 18 inch lbs. (2 Nm), then tighten bolts 1–8 (in that order) to the same specification.
    2. Tighten the left camshaft bolts No. 11 and 12 (in that order) to 18 inch lbs. (2 Nm), then tighten bolts 1–10 (in that order) to the same specification.
    3. Tighten all bolts in sequence to 51 inch lbs. (6 Nm).
    4. Tighten all bolts in sequence to 78–102 inch lbs. (9–12 Nm) and then tighten the two bolts that secure the distributor housing cap to 13–19 ft. lbs. (18–25 Nm).
38. Line up the mating marks on the timing chain and camshaft sprockets and install the timing chain and sprockets. Tighten sprocket bolts to 101–116 ft. lbs. (137–157 Nm). Be sure to hold the flats of the camshaft when tightening the sprocket bolts.
39. The balance of installation is the reverse of the removal procedure.
40. Run the engine and reset the ignition timing.
41. Road test the vehicle for proper operation.

##### 2.4L (KA24DE) Engine

###### Altima

1. Relieve the fuel system pressure.

   CAUTION
   Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure to do so may result in fire or personal injury.

2. Disconnect the negative battery cable.
3. Drain coolant from the engine and radiator.
4. Remove the air intake ducts and the air cleaner assembly.
5. Remove the vacuum hoses, fuel hoses, wires, harness, and connectors that are necessary for removal of the rocker cover.
6. Remove the alternator and mounting bracket.
7. Remove the upper radiator hose and cooling fan.
8. Set the No. 1 piston at TDC on its compression stroke.
9. Disconnect the spark plug wires from the spark plugs.
10. Matchmark and note the positioning of the distributor rotor and housing to the engine block.
11. Remove the distributor assembly.
12. Remove the rocker cover by loosening the bolts in the reverse order of installation.
13. Wire the chain to the sprocket so the chain does not fall off during sprocket removal. Hold the flats of the camshaft with a wrench just behind the first camshaft bearing cap. Loosen the bolts and remove the sprockets.
14. Remove the camshaft sprockets.

    NOTE: The stoppers on camshaft covers prevent the upper timing chain from disengaging from the idle sprocket. Also, after removal of the camshaft sprockets, note the positioning of the pins at the end of the camshafts for reinstallation purposes.

15. Remove the camshaft bearing caps in reverse order of installation, then remove the camshafts. The camshaft brackets must be loosened in the correct sequence to prevent damage to the camshaft.

    NOTE: All the valve train components must be reassembled in their original positions.

16. Remove the valve lifter adjusting shims from the tops of the of the lifters. Be sure to note the location and positioning of each shim.
17. Remove the valve lifters from the bores in the cylinder heads. Be sure to note the location and positioning of each lifter.
18. Check the diameter of the valve lifter and the valve lifter bore and compare to the following specifications.
19. The valve lifter diameter should be 1.3370–1.3376 in. (33.960–33.975mm).
20. The lifter guide bore diameter should be 1.3386–1.3394 in. (33.960–33.975mm).
21. The valve lifter to lifter guide bore clearance should be 0.0010–0.0024 in. (0.025–0.061mm).

    To install:

    NOTE: When installing the valve components, apply a coat of clean engine oil to the component.

22. Install the lifters into the lifter bores from which they were removed.
23. Install the valve shims to the lifters from which they came.
24. Install the camshafts in the same position as noted during removal and camshaft bearing caps; tighten cap bolts in the proper sequence as follows:
    1. Tighten all bolts to 17 inch lbs. (2 Nm).
    2. Tighten all bolts to 81–104 inch lbs. (9–12 Nm).

       NOTE: When installing the timing chain and sprockets, align the marks on the sprockets with the colored links of the chain.

25. Install the camshaft sprockets with the timing chain and torque the sprocket bolts to 123–130 ft. lbs. (167–177 Nm). Install the chain guide between both camshaft sprockets. The alignment marks on the upper portion of the timing chain should now be aligned with the marks on the sprockets.
26. Install the remaining components in the reverse order of removal.
27. Refill engine coolant and check the engine oil level.
28. Connect the negative battery cable.
29. Start the engine and make the necessary adjustments. Check for proper operation and leaks.

    Fig. 4: Camshaft bearing cap tightening sequence — 2.4L (KA24DE) engines

###### 240SX

1. Disconnect negative battery cable.
2. Release fuel system pressure.

   CAUTION
   Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure to do so may result in fire or personal injury.

3. Remove the air intake ducts and the air cleaner assembly.
4. Remove and tag vacuum hoses from valve cover. The fuel rail may need to be removed to access valve cover nuts.
5. Remove the cooling fan and the radiator fan shroud.
6. Remove spark plug wires.
7. Remove the valve cover and turn the crankshaft to align the timing marks at TDC on No. 1 cylinder.
8. Matchmark the position of the distributor rotor and the distributor. Remove the distributor assembly from the vehicle.
9. Remove the upper timing chain cover.
10. Remove the upper timing chain guide and tensioner.
11. Wire the chain to the sprocket so the chain does not fall off during sprocket removal. Hold the flats of the camshaft with a wrench just behind the first camshaft bearing cap. Loosen the bolts and remove the sprockets.

    NOTE: The stoppers on camshaft covers prevent the upper timing chain from disengaging from the idle sprocket.

    NOTE: After removal of the camshaft sprockets, note the positioning of the pins at the end of the camshafts for reinstallation purposes.

12. Remove the cam bearing caps in reverse order of the tightening sequence and remove the camshafts. The camshaft brackets must be loosened in the correct sequence to prevent damage to the camshaft.

    NOTE: These parts should be reassembled in their original position. Bolts should be loosened in 2–3 steps (loosen all bolts in the reverse of the tightening order).

13. Remove the valve lifter adjusting shims from the tops of the of the lifters.
14. Remove the valve lifters from the bores in the cylinder heads.
15. Check the diameter of the valve lifter and the valve lifter bore and compare to the following specifications.
16. The valve lifter diameter should be 1.3370–1.3376 in. (33.960–33.975mm).
17. The lifter guide bore diameter should be 1.3386–1.3394 in. (33.960–33.975mm).
18. The valve lifter to lifter guide bore clearance should be 0.0010–0.0024 in. (0.025–0.061mm).

    To install:

    NOTE: Apply a clean coat of new engine oil to the valve train components.

19. Install the lifters into the lifter bores from which they were removed.
20. Install the valve shims to the lifters from which they came.
21. Install the camshafts in the same position as noted during removal and install the camshaft bearing caps.
22. Tighten bearing cap bolts in the proper sequence as follows:
    1. Tighten all bolts to 17 inch lbs. (2 Nm).
    2. Tighten all bolts to 81–104 inch lbs. (9–12 Nm).

       NOTE: When installing the timing chain and sprockets, align the marks on the sprockets with the colored links of the chain.

23. Install the camshaft sprockets and torque the bolts to 123–130 ft. lbs. (167–177 Nm).
24. Install the timing chain, then install the remaining components in the opposite order from which they were removed.
25. Connect negative battery cable.
26. Start the engine and make the necessary adjustments. Check for proper operation and leaks.

##### 3.0L (VG30E) Engine

1. Disconnect the negative battery cable.
2. Drain the coolant from the cooling system and the engine. Coolant from the engine can be drained by removing the drain plug on the cylinder block.
3. Remove the timing belt assembly.
4. Remove the collector assembly and intake manifold.
5. Remove the cylinder head from the engine.
6. With cylinder head mounted on a suitable workbench, remove the rocker shafts with rocker arms. Bolts should be loosened in 2–3 steps.
7. Remove hydraulic valve lifters and lifter guide.
8. Hold hydraulic valve lifters with wire so they will not drop from lifter guide.
9. Remove the camshaft front oil seal and slide camshaft out the front of the cylinder head assembly.

   To install:

10. Install camshaft, locate plate, cylinder head rear cover and front oil seal. Set camshaft knock pin at 12 o'clock position. Install cylinder head with new gasket to engine.
11. Install valve lifter guide assembly. Assemble valve lifters in their original position. After installing them in the correct location remove the wire holding them in lifter guide.
12. Install rocker shafts in correct position with rocker arms. Tighten bolts in 2–3 stages to 13–16 ft. lbs. Before tightening, be sure to set camshaft lobe at the position where lobe is not lifted or the valve closed. You can set each cylinder one at a time or follow the procedure below (timing belt must be installed in the correct position):
    1. Set No. 1 piston at TDC on its compression stroke and tighten rocker shaft bolts for No. 2, No. 4 and No. 6 cylinders.
    2. Set No. 4 piston at TDC on its compression stroke and tighten rocker shaft bolts for No. 1, No. 3 and No. 5 cylinders.
    3. Torque specification for the rocker shaft retaining bolts is 13–16 ft. lbs.
13. Install the intake manifold and collector assembly.
14. Install the timing belt cover and camshaft sprocket. The left and right camshaft sprockets are different parts. Install the correct sprocket in the correct position.
15. Install the timing belt assembly, fill coolant and set engine timing to specifications.

##### 3.0L (VE30DE and VQ30DE) Engines

1. Relieve the fuel system pressure.

   CAUTION
   Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure to do so may result in fire or personal injury.

2. Disconnect the negative battery cable.
3. Drain the engine oil and the cooling system. Be sure to drain the engine block and the radiator.
4. Remove the left side rocker cover ornament.

   NOTE: Before disconnecting any hoses or connectors, note the locations for reassembly.

5. Remove the air duct to intake manifold hose, collector hose, blow-by hose, and vacuum hoses.
6. Remove the fuel hoses and disconnect the harness connections.
7. Disconnect the canister purge hoses.
8. Remove the water hoses from the cylinder head and intake manifold.
9. Disconnect and remove all six ignition coils from the spark plugs.
10. Remove the spark plugs.
11. Remove the bolts that secure the EGR tube and remove the tube.
12. Remove the intake manifold collector supports and remove the collector.
13. Remove the bolts that secure the fuel tube and remove the fuel tube from the vehicle.
14. Remove the bolts that secure the intake manifold to the engine block and remove the manifold. Loosen the bolts in the reverse sequence of the tightening procedure.
15. Remove the LH and RH rocker covers from the cylinder head.
16. Remove the engine undercovers.
17. Remove the right front wheel and engine side covers.
18. Remove the drive belts and idler pulley.
19. Remove the power steering oil pump belt and remove the power steering oil pump assembly.
20. Remove the camshaft position sensor (PHASE) and crankshaft position sensors (REF)/(POS).
21. Set the No. 1 piston to TDC of compression stroke by rotating the crankshaft.
22. Remove the ring gear cover access plate.
23. Loosen the crankshaft pulley bolt while securing the ring gear so the crankshaft cannot rotate.

    NOTE: Use care not to damage the ring gear teeth.

24. Using a suitable puller, remove the crankshaft pulley.
25. Remove the A/C compressor and bracket.
26. Remove the front exhaust pipe and its support.
27. Hang the engine at the right and left side engine slingers with a suitable hoist.
28. Support the transaxle with jack.
29. Remove the right side engine mounting, mounting bracket and nuts.
30. Remove the center crossmember assembly.
31. Remove the steel (lower) oil pan bolts in the reverse sequence of the torque sequence.
32. Insert a seal cutter between the steel and aluminum oil pan.
33. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the aluminum mating surface of the upper oil pan.
34. Remove the steel oil pan and the oil strainer.
35. Remove the aluminum (upper) oil pan bolts in the reverse sequence of the torque sequence.
36. Remove the transaxle bolts that secure the oil pan.
37. Insert a seal cutter between the aluminum oil pan and the engine block.
38. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the mating surfaces of the oil pan or engine block.
39. Remove the oil pan from the vehicle.
40. Remove the water pump cover and remove the bolts that secure the front timing chain case cover.
41. Using the seal cutter, remove the timing chain case cover.
42. Remove the internal timing chain guide and the upper chain guide.
43. Remove the timing chain tensioner and slack side chain guide.
44. Remove the left and right intake camshaft sprockets first. Be sure to hold the flats of the camshafts while removing the sprocket bolts.
45. Remove the lower timing chain assembly. Be sure to note the aligning marks of the chain before removal.
46. Insert a suitable stopper pin for the left and right camshaft tensioners.
47. Remove the left and right exhaust camshaft sprocket bolts. Be sure to hold the flats of the camshafts while removing the sprocket bolts.
48. Remove the upper timing chain assembly. Be sure to note the aligning marks of the chain before removal.
49. Remove the lower timing chain guide.
50. Remove the crankshaft sprocket.
51. Loosen the bolts that secure the rear timing chain case. The bolts must be loosened in sequence.
52. Using seal cutter tool, remove the rear timing case cover.

    NOTE: Remove the O-rings from the front of the engine block.

53. Loosen the camshaft bearing caps in several steps. The bearing caps MUST be loosened in sequence.

    NOTE: Keep all bearing caps and camshafts in proper order for reinstallation.

54. Remove the LH and RH camshaft tensioners from the cylinder head.
55. Remove the camshafts from the cylinder heads.

    NOTE: The valve lifters have a replaceable shim on the top of the lifter. Note the proper locations of each shim to lifter and remove the shims from the lifters.

56. Using a magnet, remove the valve adjusting shim from the lifter.
57. Remove the lifter assembly from the bore. Be sure to note the locations from where each lifter came.
58. Check the diameter of the valve lifter and the valve lifter guide bore.
59. The diameter of the lifter should be 1.3764–1.3770 in. (34.960–34.975mm) and the diameter of the bore should be 1.3780–1.3788 in. (35.000–35.021mm).
60. Remove all traces of liquid gasket from the timing chain case and from the water pump covers.
61. Remove all traces of liquid gasket from the engine block.
62. Inspect the camshafts for excessive wear or damage and replace as necessary.

    To install:

63. Lubricate the valve lifters with clean engine oil and install the lifters into the bore from which they were removed.
64. Lubricate the valve lifter shims with clean engine oil and install the shims into the lifter from which they were removed.
65. Turn the crankshaft clockwise until the No. 1 piston is set 240 degrees before TDC on compression stroke.
66. Install the camshaft tensioners on both sides of the cylinder heads. Tighten the tensioner mounting bolts to 75–96 inch lbs. (8.4–10.8 Nm).

    NOTE: The camshafts can be identified by the paint marks on the camshaft. The left cylinder head camshafts have a YELLOW paint mark and the right cylinder head camshafts have a WHITE paint mark.

    Fig. 5: Camshaft identification — 3.0L (VE30DE and VQ30DE) engines

    Fig. 6: Right intake and exhaust camshaft bearing cap torque sequence — 3.0L (VE30DE and VQ30DE) engines

    Fig. 7: Left intake and exhaust camshaft bearing cap torque sequence — 3.0L (VE30DE and VQ30DE) engines

67. Install the exhaust and intake camshafts and install the bearing caps. Before installing the No. 1 bearing cap, apply liquid gasket to the corners of the cap.

    NOTE: When installing the camshafts, position the camshaft keys at the 12 o'clock position in respect to the cylinder head angle.

68. Tighten the camshaft bearing caps as follows:
    1. Tighten bolts No. 7–10 to 17 inch lbs. (2 Nm).
    2. Tighten bolts No. 1–6 to 17 inch lbs. (2 Nm).
    3. Tighten bolts No. 1–10 to 52 inch lbs. (6 Nm).
    4. Tighten bolts No. 1–10 to 81–104 inch lbs. (9–11 Nm).
69. Install new O-rings to the front of the engine block.
70. Apply sealant to the hatched portion of the of the rear timing chain case.
71. Align the rear timing chain case with the dowel pins and install onto the cylinder heads and engine block.
72. Tighten the rear timing chain case mounting bolts in sequence to 105–121 inch lbs. (11.8–13.7 Nm).
73. Install the crankshaft sprocket with the mating mark facing out.
74. Rotate the crankshaft clockwise and position the crankshaft to TDC of compression stroke and align the dowels of the camshaft sprockets to the 12 o'clock position in respect to the cylinder head.
75. Install the lower chain guide on the dowel pin with the front mark on the guide facing upward.
76. On a work bench, align the marks on the intake and exhaust camshaft sprockets with the marks of the chain.
77. Put the exhaust camshaft sprockets onto the dowel pin and tighten the mounting bolts to 88–95 ft. lbs. (119–128 Nm). Be sure to secure the camshafts while tightening the bolts.
78. Install the timing chains, sprockets and related components.
79. Install the transaxle bolts that secure the oil pan.
80. Install the oil pan strainer and tighten the mounting bolts to 12–14 ft. lbs. (16–19 Nm).
81. Apply a 0.177–0.217 inch (4.5–5.5mm) continuous bead of liquid gasket to the lower oil pan mating surface and install the oil pan. Tighten the mounting bolts in sequence to 57–66 inch lbs. (6.4–7.5 Nm).
82. Tighten the oil pan drain plug to 22–29 ft. lbs. (29–39 Nm).
83. Install the center crossmember assembly.
84. Install the right side engine mounting bracket and mount assembly.
85. Remove the engine slinger assembly.
86. Install the front exhaust pipe and its support.
87. Install the A/C compressor and bracket.
88. Install the crankshaft pulley to the crankshaft and install the mounting bolt.
89. Tighten the mounting bolt to 14–22 ft. lbs. (20–29 Nm). Tighten the crankshaft bolt an additional 60–66 degrees clockwise. This is about the angle from one hexagon bolt head corner to another.
90. Install the remaining components in the opposite order from which they were removed.
91. Refill the engine oil and coolant with the proper type and amount of fluid.
92. Connect the negative battery cable.
93. Start the engine and run at 3000 RPM under no load to purge the air from the high pressure chamber. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern.

##### 3.0L (VG30DE and VG30DETT) Engines

Fig. 8: Camshaft bearing cap bolt tightening sequence — 3.0L (VG30DE and VG30DETT) engines

WARNING
After the timing belt has been removed, DO NOT rotate the crankshaft or camshafts. The valves and pistons will make contact thus causing severe engine damage.

1. Position the engine so that No. 1 piston is at TDC of the compression stroke.
2. Relieve the fuel system pressure and disconnect the negative battery cable.
3. Drain the cooling system. Be sure to drain the engine block.
4. Disconnect the accelerator cable from the throttle body linkage.
5. Disconnect the cruise control cable from the throttle body linkage.
6. Note the locations and disconnect the vacuum lines from the intake manifold collector.
7. Unbolt and remove the intake manifold collector from the intake manifold.

   NOTE: After the intake manifold collector has been removed, cover the openings on the intake manifold to prevent foreign objects from entering the combustion chamber.

8. Note the locations and disconnect the electrical wiring from the intake manifold and engine harness.
9. Remove the ignition coils and spark plugs from the engine.
10. Remove the mounting bolts from the fuel rail and remove the fuel injector pipe with injectors from the intake assembly.
11. Remove the valve covers.
12. Remove the radiator.
13. Remove the drive belts. Mark the drive belts for reinstallation purposes.
14. Remove the cooling fan and cooling fan coupling.
15. Mark the camshaft position sensor to the sensor mounting bracket and unbolt the sensor.
16. Remove the starter and lock the flywheel ring gear using a suitable locking device.
17. Remove the crankshaft pulley bolt.

    NOTE: The engine is locked to prevent the crankshaft gear from turning during removal and installation. Remove the lock during engine timing portion of this procedure.

18. Remove the crankshaft pulley using a suitable puller.
19. Remove the water inlet and outlet housings.
20. Remove the timing belt covers and gaskets.
21. Remove the crank angle sensor mounting bracket.
22. Install a suitable 6mm stopper bolt in the tensioner arm of the auto tensioner so the length of the pusher does not change.

    NOTE: Mark the timing belt direction of rotation for reinstallation purposes.

23. Remove the automatic tensioner and the timing belt.
24. Check the automatic tensioner for oil leaks in the pusher rod and diaphragm. If oil is evident, replace the automatic tensioner assembly.
25. Inspect the timing gear teeth for wear and if the sprockets show signs of wear they must be replaced.
26. Remove the idler pulley mounting nut, remove the idler pulley and remove the idler pulley stud.
27. Unbolt and remove the intake manifold assembly.
28. Disconnect the exhaust pipe from the exhaust manifold.
29. Loosen the cylinder head bolts (in reverse order of installation sequence) in 2–3 stages. Lift the cylinder head off the engine block with the exhaust manifolds attached. It may be necessary to tap the head lightly with a rubber mallet to loosen it.
30. Position the cylinder head on blocks of wood to protect the surface of the head and to protect the any valves that may extend below the surface of the cylinder head.
31. Remove the exhaust manifold from the cylinder head.
32. While holding the flats of the camshaft in position with a wrench, remove the mounting bolts from the camshaft sprockets.

    NOTE: Remove the front plate, O-ring and spring from the right (intake) camshaft to gain access to the sprocket bolt. The left camshaft sprocket is held in place by plate and 4 bolts.

33. Note the positioning of the sprockets to the camshaft and remove the sprocket from the camshafts.
34. To remove the camshaft you will need to remove the rear timing belt cover which will be accessible after the camshaft sprockets are removed.
35. Mount a dial indicator and set the stylus of the indicator on the end of the camshaft. Zero the indicator and measure the camshaft end-play by moving the camshaft back and forth. End-play should be within 0.0012–0.0031 in. (0.03–0.08mm).
36. Remove the camshaft bearing caps. Loosen the bolts in the proper sequence (reverse the installation torque sequence) gradually in 2–3 stages.
37. Gently pry the camshaft oil seals from the cylinder head.
38. Remove the timing control solenoid valves.
39. Remove the camshafts from the cylinder head.

    NOTE: Be sure to note positioning of the exhaust and the intake camshafts before removing them.

    To install:

40. Install the camshafts so the knock pins are aligned properly. The exhaust side camshaft (left side) has a spline that accepts the crank angle sensor.
41. Install the timing control solenoid valves. Torque the bracket bolts to 12–18 ft. lbs. (16–25 Nm). Apply liquid gasket to the valve seating surface before installation.
42. Install the camshaft bearing caps. Torque the bracket bolts in sequence to 7–9 ft. lbs. (9–12 Nm). Tighten the bolts gradually in 2–3 stages. When installing the front camshaft brackets, apply liquid gasket to the bracket seating surface.
43. Coat the lips of the new camshaft seals with clean engine oil and install the seals into the cylinder head.
44. Install the rear timing belt covers. Torque the cover bolts to 5–6 ft. lbs. (6–8 Nm).
45. Install the camshaft sprockets.
46. Install the cylinder head with a new gasket.
47. Connect the exhaust tube to the exhaust manifold.
48. Install the remaining components in the reverse order of removal.
49. Fill the cooling system to the proper level and connect the negative battery cable.
50. Run the engine and make all the necessary engine adjustments.
51. Road test the vehicle for proper operation.