REMOVAL

1.Remove engine assembly from the vehicle. Refer to Exploded View (GT-R certified NISSAN dealer).

2.Disconnect the heated oxygen sensor 2 connector and harness from the heat insulator.

3.Remove the three-way catalyst (bank 1) and (bank 2) from the engine assembly. Refer to Exploded View.

4.Remove the heat insulator from the flywheel housing assembly.

5.Remove the engine mounting insulator (rear) from the flywheel housing assembly. Refer to Exploded View (GT-R certified NISSAN dealer).

6.Remove the starter motor. Refer to Exploded View (GT-R certified NISSAN dealer).

7.Remove the crankshaft position sensor (POS). Refer to Exploded View (GT-R certified NISSAN dealer).
■ CAUTION ■

- Never subject it to impact by dropping.
- Never disassemble the sensor.
- Check that metal powder does not adhere to magnetic area on top of sensor.
- Keep the sensor away from magnetic materials.

8.Remove the rear plate cover (1) using a flat-bladed screwdriver (A).
■ CAUTION ■
Never damage the flywheel housing assembly.

9.Rotate the crankshaft and remove the bolts (: 6 places) that secure the flywheel to drive line torsional vibration damper.
■ CAUTION ■
Rotate crankshaft clockwise (as viewed from the front of the engine).

10.Remove the mounting bolts of engine assembly and flywheel housing assembly.

11.Remove the flywheel housing assembly from the engine assembly.
■ CAUTION ■

- Remove drive line torsional damper and flywheel housing together.
- When removing flywheel housing assembly, remove it slowly, as drive line torsional vibration damper may escape from flywheel housing shaft and remain at flywheel side.
- After removing flywheel housing assembly, pay attention as inclining the front side of flywheel housing assembly down may drop drive line torsional vibration damper.
- If drive line torsional vibration damper remains at flywheel side, confirm match marks (A) on drive line torsional vibration damper and flywheel housing shaft edge, recover the original status fitting the match marks. In case match marks cannot be recognized and the original status cannot be recovered, replace flywheel housing assembly, since original performance cannot be achieved.

INSTALLATION
Note the following, and install in the reverse order of removal.
■ CAUTION ■
Confirm match marks (A) on drive line torsional vibration damper and flywheel housing shaft edge. In case match marks is invisible, wipe the grease at end-face and make match marks again. Do not wipe the grease at spline fitting point.

- When installing flywheel housing assembly to engine, follow the below procedure.

1.After confirming that cylinder block dowel pin (A) and flywheel dowel pin (B) are not damaged nor detached, rotate crank shaft to right, seen from engine front. Adjust the flywheel dowel pin to fit at 12 o’clock and 6 o’clock.

2.Adjust drive line torsional vibration damper dowel pin fitting hole (convex part) () to fit at 12 o’clock and 6 o’clock.

3.Rotate flywheel housing assembly companion flange so that the flywheel dowel pin fits the drive line torsional vibration damper dowel pin fitting hole. Install the flywheel housing assembly and engine assembly tightening bolt.

Bolt symbol | A (Housing side → Engine side) | B (Housing side → Engine side) | C (Engine side → Housing side)
Quantity | 4 | 3 | 4
Nominal length mm (in) | 65 (2.56) | 40 (1.57) | 40 (1.57)
Tightening torque N·m (kg-m, ft-lb) | 75 (7.7, 55) | 34 (3.5, 25) | 65 (6.6, 48)

■ CAUTION ■
When installing flywheel housing assembly, pay attention as inclining the front side of flywheel housing assembly down may drop drive line torsional vibration damper.
NOTE：
If drive line torsional vibration damper dowel pin fitting hole is hard to recognize, remove drive line torsional vibration damper from flywheel housing and paint mark the dowel pin fitting hole (convex part) from the back face to easily recognize the dowel pin fitting hole at installation. However, when removing drive line torsional vibration damper, make sure to confirm the match marks on drive line torsional vibration damper and flywheel housing shaft edge, fitting the match marks and recover the original status after making paint mark.

4.After confirming that dowel pin is fit in the fitting hole, rotate engine crankshaft to right, seen from engine front, and confirm that drive line torsional vibration damper rotates together with flywheel.

5.Insert a stick tool [20 cm (7.87 in) or longer] (A) from flywheel housing working hole, fasten drive line torsional vibration damper to flywheel (2), pushing the center of drive line torsional vibration damper (1) to front side.
■ CAUTION ■

- When pushing the drive line torsional vibration damper to flywheel, pay attention not to damage the drive line torsional vibration damper.
- For stick tool, use one which does not damage drive line torsional vibration damper. If a tool is used such as long driver, use one whose metal part is 20 cm (7.87 in) or longer, cover the metal part with waste not to damage the drive line torsional vibration damper.

6.Tighten the bolts of flywheel and drive line torsional vibration damper evenly in 2 steps as shown in the figure after temporarily tightening the bolt. The figure shows the view from the rear of the vehicle.

A | : First step
B | : Second step
C | : Knock pin

■ CAUTION ■

- Rotate crankshaft clockwise (as viewed from the front of the engine).
- Check the tightening torque for crankshaft pulley mounting bolts after drive line torsional vibration damper bolts are tightened and crankshaft pulley mounting bolts are secured.

- Press the tabs (B) into the flywheel housing assembly after inserting the tabs (A) into the flywheel housing assembly when installing the rear plate cover. The figure shows the view from the top of the vehicle.
  ■ CAUTION ■
  - Never reuse rear plate cover.
  - Check for installation direction.
  - Press surrounding area of tabs (B) when pressing the tabs (B) in.
  - Never tap the cover when installing.
  - Check cover unit for excessive looseness and surrounding embossment.
- Temporally tighten the mounting bolt, and then tighten it to the specified torque in the order shown in the figure when installing the heat insulator to the flywheel housing assembly.