Disassembly And Assembly: Disassembly

WARNING: This page is about a different car, the 2016 Infiniti QX50. However, it is still accessible from the selected car via links, so may be relevant.

Remove the following parts:
- Lower oil pan: Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS (2WD models) or EXPLODED VIEW WITH TORQUE SPECIFICATIONS (AWD models).
- Upper oil pan: Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .
- Front and rear timing chain case: Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS (front) and EXPLODED VIEW WITH TORQUE SPECIFICATIONS (rear).
- Cylinder head: Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .
Remove knock sensor.
CAUTION:
Carefully handle sensor avoiding shocks.
Remove baffle plate from lower cylinder block.

Remove piston and connecting rod assembly with the following procedure:

Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to INSPECTION .

CAUTION:

Never drop connecting rod bearing, and to scratch the surface.

Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
Remove connecting rod bearing cap.

Using a hammer handle or similar tool, push piston and connecting rod assembly out to the cylinder head side.

Courtesy of NISSAN NORTH AMERICA, INC.

CAUTION:

Never damage the cylinder wall and crankshaft pin, resulting from an interference of the connecting rod big end.

Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
- Never drop connecting rod bearing, and to scratch the surface.
- Identify installation positions, and store them without mixing them up.

Remove piston rings from piston.

Before removing piston rings, check the piston ring side clearance. Refer to INSPECTION .

Use a piston ring expander (commercial service tool) (A).

Courtesy of NISSAN NORTH AMERICA, INC.

CAUTION:

When removing piston rings, be careful not to damage piston.
Never damage piston rings by expanding them excessively.

Remove piston from connecting rod as follows:

Using snap ring pliers (A), remove snap rings.

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Heat piston to 60 to 70°C (140 to 158°F) with an industrial use dryer (A) or equivalent.

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Push out piston pin using a stick than has an outer diameter of approximately 20 mm (0.79 in).

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Remove lower cylinder block bolts.
- Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to INSPECTION .
- Loosen lower cylinder block bolts in the reverse order shown in the illustration in several different steps.
  
  Fig 1: Lower Cylinder Block Bolts Tightening Sequence
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  : Engine front
Remove lower cylinder block as follows:
Screw M8 bolt [pitch: 1.25 mm (0.049 in) length: approximately 50 mm (1.97 in)] into bolt holes (A). Then equally tighten each bolt, and remove lower cylinder block.

Courtesy of NISSAN NORTH AMERICA, INC.

: Engine front
CAUTION:
- Never damage the mounting surfaces.
- Never tighten bolts excessively.
- Never insert screwdriver, this will damage the mating surface.
Remove crankshaft.
Pull rear oil seal out from rear end of crankshaft.
Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
CAUTION:
- Never drop main bearing, and to scratch the surface.
- Identify installation positions, and store them without mixing them up.
Remove oil jet.