Camshaft Valve Clearance: Inspection

NOTE: Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts, or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or noise).

Remove the engine room cover. Refer to [ENGINE ROOM COVER: REMOVAL AND INSTALLATION ].
Remove the air cleaner and air duct assembly. Refer to [AIR CLEANER AND AIR DUCT: EXPLODED VIEW ].
Remove rocker covers (RH and LH banks). Refer to [ROCKER COVER: REMOVAL AND INSTALLATION ].

Measure the valve clearance as follows:

Set No. 1 cylinder at TDC of its compression stroke.
- Rotate crankshaft pulley clockwise to align timing mark (A) (grooved line without color) with timing indicator (B).
  
  Fig 1: Aligning Timing Mark With Timing Indicator
  Courtesy of SUZUKI OF AMERICA CORP.
- Make sure that intake and exhaust cam noses on No. 1 cylinder (engine front side of RH bank) are located as shown.
  
  Fig 2: Identifying Intake And Exhaust Cam Noses On No. 1 Cylinder
  Courtesy of SUZUKI OF AMERICA CORP.
- If not, rotate crankshaft one revolution (360°) and align as shown.

Use feeler gauge, measure the clearance between valve lifter and camshaft.

Fig 3: Measuring Clearance Between Valve Lifter And Camshaft

Courtesy of SUZUKI OF AMERICA CORP.

Valve clearance:

VALVE CLEARANCE SPECIFICATION

Unit: mm (in)

Cold⁽¹⁾

Hot⁽²⁾ (reference data)

Intake

0.26 - 0.34 (0.010 - 0.013)

0.304 - 0.416 (0.012 - 0.016)

Exhaust

0.29 - 0.37 (0.011 - 0.015)

0.308 - 0.432 (0.012 - 0.017)

⁽¹⁾	Approximately 20°C (68°F)

⁽²⁾	Approximately 80°C (176°F)

Measure the valve clearances at locations marked "x" as shown in the table below (locations indicated in the illustration) with feeler gauge.

Fig 4: Identifying Valve Clearances At Locations Marked
Courtesy of SUZUKI OF AMERICA CORP.

No. 1 cylinder at compression TDC

CYLINDER REFERENCE

Measuring position (RH bank)		No. 1 CYL.	No. 3 CYL.	No. 5 CYL.
No. 1 cylinder at compression TDC	EXH		x
No. 1 cylinder at compression TDC	INT	x
Measuring position (LH bank)		No. 2 CYL.	No. 4 CYL.	No. 6 CYL.
No. 1 cylinder at compression TDC	INT			x
No. 1 cylinder at compression TDC	EXH	x

Rotate crankshaft by 240° clockwise (when viewed from engine front) to align No. 3 cylinder at TDC of its compression stroke.

Fig 5: Aligning No. 3 Cylinder At TDC Of Compression Stroke

Courtesy of SUZUKI OF AMERICA CORP.

NOTE: Crankshaft pulley bolt flange has a stamped line every 60°. They can be used as a guide to rotation angle.

Measure the valve clearances at locations marked "x" as shown in the table below (locations indicated in the illustration) with feeler gauge.

Fig 6: Measuring Valve Clearances At Locations Marked
Courtesy of SUZUKI OF AMERICA CORP.

No. 3 cylinder at compression TDC

CYLINDER SPECIFICATION

Measuring position (RH bank)		No. 1 CYL.	No. 3 CYL.	No. 5 CYL.
No. 3 cylinder at compression TDC	EXH			x
No. 3 cylinder at compression TDC	INT		x
Measuring position (LH bank)		No. 2 CYL.	No. 4 CYL.	No. 6 CYL.
No. 3 cylinder at compression TDC	INT	x
No. 3 cylinder at compression TDC	EXH		x

Rotate crankshaft by 240° clockwise (when viewed from engine front) to align No. 5 cylinder at TDC of compression stroke.

Fig 7: Aligning No. 5 Cylinder At TDC Of Compression Stroke

Courtesy of SUZUKI OF AMERICA CORP.

Measure the valve clearances at locations marked "x" as shown in the table below (locations indicated in the illustration) with feeler gauge.

Fig 8: Measuring Valve Clearances At Locations Marked
Courtesy of SUZUKI OF AMERICA CORP.

No. 5 cylinder at compression TDC

CYLINDER SPECIFICATION

Measuring position (RH bank)		No. 1 CYL.	No. 3 CYL.	No. 5 CYL.
No. 5 cylinder at compression TDC	EXH	x
No. 5 cylinder at compression TDC	INT			x
Measuring position (LH bank)		No. 2 CYL.	No. 4 CYL.	No. 6 CYL.
No. 5 cylinder at compression TDC	INT		x
No. 5 cylinder at compression TDC	EXH			x

For the measured value out of the standard, perform adjustment.