Disassembly And Assembly: Disassembly

NOTE:

The following procedures explain how to disassemble the engine with the engine stand fastened to the bell housing. Some steps may be different if using a different type of engine stand.

Remove cylinder head. Refer to EXPLODED VIEW .
Remove knock sensor.
CAUTION:
Carefully handle knock sensor avoiding shocks.

Remove the crankshaft position sensor cover (3), and then crankshaft position sensor (POS) (2).

Fig 1: Crankshaft Position Sensor Cover (3), And Crankshaft Position Sensor (POS) (2)

Courtesy of NISSAN NORTH AMERICA, INC.

(1)	O - ring
(4)	Cylinder block
	: Engine front

CAUTION:

Avoid impacts such as a dropping.
Do not disassemble.
Keep sensor away from metal particles.
Do not place the sensor in a location where it is exposed to magnetism.
Do not reuse O-ring.

Remove oil pan (upper and lower). Refer to EXPLODED VIEW .
Remove piston and connecting rod assembly:
- Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to INSPECTION .
1. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
2. Remove connecting rod cap.
3. Using a hammer handle or similar tool, push piston and connecting rod assembly out through the cylinder head side.
  
  Fig 2: Removing Piston And Connecting Rod Assembly
  Courtesy of NISSAN NORTH AMERICA, INC.
  CAUTION:
  - Do not damage mating surface with connecting rod cap.
  - Do not damage the cylinder wall or crankshaft pin.
Remove connecting rod bearings.
CAUTION:
Identify original positions for installation, and store the bearings without mixing them up.
Remove piston rings from piston.
- Before removing piston rings, check the piston ring side clearance. Refer to INSPECTION .
- Use a suitable tool (A) as shown.
  
  Fig 3: Removing Piston Rings
  Courtesy of NISSAN NORTH AMERICA, INC.
  CAUTION:
  - When removing piston rings, be careful not to damage the piston.
  - Do not damage piston rings by expanding them excessively.
Remove piston from connecting rod using the following procedure:
1. Remove snap rings using snap ring pliers (A).
  
  Fig 4: Removing Snap Rings Using Snap Ring Pliers
  Courtesy of NISSAN NORTH AMERICA, INC.
2. Heat piston to 60 to 70°C (140 to 158°F) with a heat gun (A).
  
  Fig 5: Heating Piston Using Heat Gun
  Courtesy of NISSAN NORTH AMERICA, INC.
3. Push out piston pin using a punch of outer diameter approximately 18 mm (0.71 in).
  
  Fig 6: Pushing Out Piston Pin
  Courtesy of NISSAN NORTH AMERICA, INC.
Remove the main bearing cap.
- Measure crankshaft end play before loosening main bearing cap bolts. Refer to INSPECTION .
1. Loosen and remove bolts in several steps in reverse of the numerical order as shown.
  
  Fig 7: Main Bearing Cap Bolts (Reverse For Loosening)
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  : Engine front
  
  NOTE:
  When removing or installing signal plate, use socket (size T40).
2. Remove the main bearing cap from the cylinder block while tapping lightly with a plastic hammer.
Remove crankshaft (2).

Fig 8: Signal Plate And Crankshaft
Courtesy of NISSAN NORTH AMERICA, INC.
CAUTION:
- Do not damage or deform signal plate (1) mounted on crankshaft.
- When setting crankshaft on a flat floor surface, use a block of wood to avoid interference between signal plate and the floor surface.
- Do not remove signal plate unless it is necessary to do so.
NOTE:
When removing or installing signal plate, use socket (size T40).
Pull rear oil seal out from rear end of crankshaft.
Remove main bearing (upper/lower) and thrust bearings from cylinder block and main bearing caps.
CAUTION:
Identify original installation positions, and store the bearings without mixing them up.
Remove oil jets.
CAUTION:
Insert the dowel pin of oil jet into the cylinder block dowel pin hole to loosen the bolt.