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)
.