INSPECTION Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if there is unusual engine conditions regarding valve clearance. In cases of removing/installing or replacing camshaft and valve-related parts, or of unusual engine conditions due to changes in valve clearance (found malfunctions during stating, idling or causing noise), perform inspection as follows:

| : Engine front

1.Remove rocker covers (bank 1 and bank 2). Refer to Exploded View.

2.Measure the valve clearance as follows:

(1)Set No. 1 cylinder at TDC of its compression stroke.

- Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator (1).

  | : Timing mark (grooved line without color)

  NOTE：
  Timing indicator is not included because it is not factory-supplied.
- Check that intake and exhaust cam nose on No. 1 cylinder (engine front side of bank 1) are located as shown in the figure.
- If not, turn crankshaft one revolution (360 degrees) and align as shown in the figure.

  | : Engine front

(2)Use a feeler gauge, measure the clearance between valve lifter and camshaft.

Valve clearance | : Refer to Camshaft (GT-R certified NISSAN dealer).

- By referring to the figure, measure the valve clearances at locations marked “×” as shown in the table below (locations indicated in the figure).

  | : Engine front

- No. 1 cylinder at compression TDC

  Measuring position [bank 1 (A)] | No. 1 CYL. | No. 3 CYL. | No. 5 CYL.
  No. 1 cylinder at compression TDC | EXH (C) |  | × (B) |
  INT (D) | × (E) |  |
  Measuring position [bank 2 (H)] | No. 2 CYL. | No. 4 CYL. | No. 6 CYL.
  No. 1 cylinder at compression TDC | INT (D) |  |  | × (F)
  EXH (C) | × (G) |  |

(3)Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 3 cylinder at TDC its compression stroke.
NOTE：
Mark a position 240 degrees (b) from a corner of the hexagonal part of crankshaft pulley mounting bolt as shown in the figure. Use the hexagonal part as a guide.

1 | : Crankshaft pulley
A | : Paint mark

- By referring to the figure, measure the valve clearances at locations marked “×” as shown in the table below (locations indicated in the figure).

  | : Engine front

- No. 3 cylinder at compression TDC

  Measuring position [bank 1 (A)] | No. 1 CYL. | No. 3 CYL. | No. 5 CYL.
  No. 3 cylinder at compression TDC | EXH (C) |  |  | × (B)
  INT (D) |  | × (E) |
  Measuring position [bank 2 (H)] | No. 2 CYL. | No. 4 CYL. | No. 6 CYL.
  No. 3 cylinder at compression TDC | INT (D) | × (F) |  |
  EXH (C) |  | × (G) |

(4)Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 5 cylinder at TDC of compression stroke.
NOTE：
Mark a position 240 degrees (b) from a corner of the hexagonal part of crankshaft pulley mounting bolt as shown in the figure. Use the hexagonal part as a guide.

1 | : Crankshaft pulley
A | : Paint mark

- By referring to the figure, measure the valve clearances at locations marked “×” as shown in the table below (locations indicated in the figure).

  | : Engine front

- No. 5 cylinder at compression TDC

  Measuring position [bank 1 (A)] | No. 1 CYL. | No. 3 CYL. | No. 5 CYL.
  No. 5 cylinder at compression TDC | EXH (C) | × (B) |  |
  INT (D) |  |  | × (E)
  Measuring position [bank 2 (H)] | No. 2 CYL. | No. 4 CYL. | No. 6 CYL.
  No. 5 cylinder at compression TDC | INT (D) |  | × (F) |
  EXH (C) |  |  | × (G)

3.Perform adjustment if the measured value is out of the standard. Refer to Inspection (GT-R certified NISSAN dealer).