Disassembly and Assembly: Disassembly

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

Remove the following parts:
- Rocker cover and spark plug: Refer to "EXPLODED VIEW ".
- Intake manifold: Refer to "EXPLODED VIEW ".
- Exhaust manifold: Refer to "EXPLODED VIEW ".
- Water inlet and thermostat housing: Refer to "EXPLODED VIEW ".
- Water pipe and heater pipe: Refer to "EXPLODED VIEW ".
- Timing chain: Refer to "EXPLODED VIEW ".
- Camshaft (EXH) and VVEL ladder assembly: Refer to "EXPLODED VIEW ".
Remove cylinder head.
- Loosen mounting bolts in reverse order as shown in the figure below.
  
  Fig 1: Cylinder Head Mounting Bolts Tightening Sequence
  Courtesy of NISSAN NORTH AMERICA, INC.
- Use TORX socket and power tool.
Remove cylinder head gaskets.
Remove oil filter (for VVEL ladder assembly) from cylinder block, if necessary.
Remove valve lifter.
Identify installation positions, and store them without mixing them up.
Remove valve collet.
- Compress valve spring with the valve spring compressor [SST:
  KV10116200 (J-26336-A)] (A), the attachment [SST:
  
  KV10115900 (J-26336-20)] (C) and the adapter [SST:
  
  KV10109220 (-)] (B). Remove valve collet with a magnet hand.
  
  CAUTION: When working, take care not to damage valve lifter holes.
Fig 2: Compressing Valve Spring Using Compressor
Courtesy of NISSAN NORTH AMERICA, INC.
Remove valve spring retainer and valve spring (with valve spring seat).
Push valve stem to combustion chamber side, and remove valve.
- Identify installation positions, and store them without mixing them up.
Remove valve oil seal using the valve oil seal puller [SST: KV10107902 (J38959)] (A).

Fig 3: Removing Valve Oil Seal Using Valve Oil Seal Puller
Courtesy of NISSAN NORTH AMERICA, INC.
Remove valve seat (EXH), if valve seat (EXH) must be replaced.
- Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess in cylinder head. Set the machine depth stop to ensure this. Refer to "CYLINDER HEAD ".
  CAUTION: Prevent to scratch cylinder head by excessive boring.
Remove valve guide (EXH), if valve guide (EXH) must be replaced.
1. To remove valve guide (EXH), heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in heated oil (A).
  
  Fig 4: Heating Cylinder Head Using Heated Oil
  Courtesy of NISSAN NORTH AMERICA, INC.
2. Drive out valve guide (EXH) with a press [under a 20 kN (2 ton, 2.2 US ton, 2.0 lmp ton) pressure] or a hammer and the valve guide drift (commercial service tool).
  WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
  
  Fig 5: Driving Out Valve Guide (EXH) Using Hammer
  Courtesy of NISSAN NORTH AMERICA, INC.