DISASSEMBLY

1.Remove front timing chain case, rear timing chain case, camshaft sprocket and timing chain. Refer to Exploded View (GT-R certified NISSAN dealer).

2.Remove camshaft sensor bracket.

- Loosen mounting bolts in reverse order as shown in the figure.

A | : Bank 1
B | : Bank 2
| : Engine front

3.Remove camshaft brackets.

- Mark camshafts, camshaft brackets and bolts so they are placed in the same position and direction for installation.
- Equally loosen camshaft bracket bolts in several steps in reverse order as shown in the figure.

| : Engine front

4.Remove timing chain tensioners (secondary) (1) from cylinder head.

A | : Bank 1
B | : Bank 2

- Remove timing chain tensioners (secondary) with its stopper pin (C) attached.

5.Remove camshaft.

6.Remove valve lifter.

- Identify installation positions, and store them without mixing them up.

7.Remove camshaft position sensor (PHASE), if necessary.
■ CAUTION ■
Never shock camshaft position sensors.

ASSEMBLY

1.Install valve lifter.

- Install it in the original position.

2.Install camshafts.

5 | : Camshaft signal plate
| : Engine front

- Follow your identification marks made during removal, or follow the identification marks that are present on new camshafts for proper placement and direction.

  Bank | Camshaft | Paint marks | Identification mark (A)
  M1 (C) | M2 (D) | M3 (B)
  Bank 1 | EXH (1) | No | White | Light blue | 1R
  INT (2) | White | No | Light blue | 1Q
  Bank 2 | INT (3) | White | No | Light blue | 1S
  EXH (4) | No | White | Light blue | 1T

- Install camshaft so that dowel pin (A) on front end face are positioned as shown in the figure. (No. 1 cylinder TDC on its compression stroke)

  1 | : Crankshaft key

  NOTE：
  Though camshaft does not stop at the portion as shown in the figure, for the placement of cam nose, it is generally accepted camshaft is placed for the same direction of the figure.

3.Install timing chain tensioners (secondary) (1) on both sides of cylinder head.

A | : Bank 1
B | : Bank 2

- Install timing chain tensioner with its stopper pin (C) attached.
- Install timing chain tensioner with sliding part facing downward on cylinder head (bank 1), and with sliding part facing upward on cylinder head (bank 2).

4.Install camshaft brackets as follows.

(1)Remove foreign material completely from camshaft bracket backside and from cylinder head installation face.

(2)Install camshaft bracket in original position and direction as shown in figure.

- Install camshaft brackets (No. 2 to 4) aligning the stamp marks (A) as shown in the figure.

  B | : Bank 1
  C | : Bank 2
  | : Engine front

  NOTE：
  There are no identification marks indicating bank 1 and bank 2 for camshaft bracket (No. 1).

(3)Apply liquid gasket to mating surface of camshaft bracket (No. 1) as shown on both bank 1 and bank 2.

a | : 2 mm (0.08 in)
b | : Clearance 5 mm (0.20 in)
c | : φ2.5 mm (0.098 in)
| : Engine front

Use Genuine RTV Silicone Sealant or equivalent. Refer to Recommended Chemical Products and Sealants.

5.Tighten camshaft bracket bolts in the following steps, in numerical order as shown.

| : Engine front

(1)Tighten No. 7 to 10 in numerical order as shown.

: 2.0 N·m (0.20 kg-m, 1 ft-lb)

(2)Tighten No. 1 to 6 in numerical order as shown.

: 2.0 N·m (0.20 kg-m, 1 ft-lb)

(3)Tighten No. 1 to 10 in numerical order as shown.

: 5.9 N·m (0.60 kg-m, 4 ft-lb)

(4)Tighten No. 1 to 10 in numerical order as shown.

: 10.4 N·m (1.1 kg-m, 8 ft-lb)

6.Measure difference in levels between front end camshaft bracket (No. 1) and cylinder head.

Standard | : –0.14 to 0.14 mm (–0.0055 to 0.0055 in)

- Measure two positions (both intake and exhaust side) for a single bank.
- If the measured value is out of the standard, re-install camshaft bracket (No. 1).

7.Install camshaft sensor bracket as follows:

(1)Apply liquid gasket to mating surface of camshaft sensor bracket as shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to Recommended Chemical Products and Sealants.

a | : φ2.5 mm (0.098 in)
| : Engine front

(2)Tighten mounting bolts in numerical order as shown in the figure.

A | : Bank 1
B | : Bank 2
| : Engine front

8.Inspect and adjust the valve clearance. Refer to Inspection (GT-R certified NISSAN dealer) and Inspection (GT-R certified NISSAN dealer).

9.Install in the reverse order of removal after this step.