Removal And Installation: Removal

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

Remove the timing chains. Refer to REMOVAL .
Remove the fuel rail and injectors. Refer to REMOVAL AND INSTALLATION .
Remove the intake manifold using power tool.
- Loosen the bolts in the numerical order as shown.
Remove the coolant outlet housing.
Remove rear timing chain case bolts using power tool.
- Loosen the bolts in the numerical order as shown.
Fig 2: Rear Timing Chain Case Bolt Loosening Sequence
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove rear timing chain case using the Tool.

Fig 3: Removing Rear Timing Chain Case Using The Tool
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the O-rings from the front of the cylinder heads.
- Discard the O-rings and use new O-rings for installation.
Fig 4: View Of O-Rings (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the O-rings from the cylinder block.
- Discard the O-rings and use new O-rings for installation.
Fig 5: View Of O-Rings (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the IVTC (intake valve timing control) valves.
- Discard the IVTC valve gaskets and use new gaskets for installation.
Remove the intake and exhaust camshafts and the camshaft brackets.
- Mark the camshaft brackets so they are placed in the same position and direction for installation.
- Equally loosen the camshaft bracket bolts in several steps in the numerical order shown.
Fig 6: View Of Camshaft Bracket Torque Sequence (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 7: View Of Camshaft Bracket Torque Sequence (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: If replacing the oil seals only, without removing the cylinder head, follow the steps below. Use method A or Method B to hold the valve in place while removing the component parts, so the valve does not fall into the combustion chamber.
1. Method A:
  Without removing the cylinder head, set the piston being worked on to TDC to prevent the valve from falling into the combustion chamber.
  
  Method B:
  
  Without removing the cylinder head, remove the spark plug from the head, then install an air hose adapter into the spark plug hole and apply air pressure of 490 kPa (5 kg/cm2, 71 psi), as shown. The air pressure will hold the valve in place. This method will only work if the valves and valve seats are in good condition, if not, use Method A.
2. Remove the valve lifters. Mark the lifters so they are installed in their original position if being reused.
3. Compress the valve spring with the Tool and remove the following components:
  - Valve collet
  - Valve spring retainer
  - Valve spring
  - Valve spring seat
  Fig 8: Compressing Valve Spring
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. With suitable pliers, remove the valve oil seal and replace it.
Fig 9: Removing Valve Oil Seal
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the RH and LH cylinder head bolts, with power tool.
- The bolts should be loosened gradually in three stages.
- Loosen the bolts in the numerical order as shown.
Fig 10: View Of RH Cylinder Head Bolt Loosening Sequence
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 11: View Of LH Cylinder Head Bolt Loosening Sequence
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove cylinder heads and gaskets.
- Discard the cylinder head gaskets and use new gaskets for installation.