CAMSHAFT VALVE CLEARANCE

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).