Camshaft Valve Clearance: Adjustment

Perform adjustment depending on selected head thickness of valve lifter.

Measure the valve clearance.
Remove camshaft. Refer to [CAMSHAFT: REMOVAL AND INSTALLATION ].
Remove valve lifters at the locations that are out of the standard.
Measure the center thickness of the removed valve lifters with a micrometer.

Fig 1: Measuring Center Thickness Of Valve Lifter
Courtesy of SUZUKI OF AMERICA CORP.
Use the equation below to calculate valve lifter thickness for replacement.
Valve lifter thickness calculation: t = t ₁ + (C ₁ -C ₂ )

t = Valve lifter thickness to be replaced

t ₁ = Removed valve lifter thickness

C ₁ = Measured valve clearance

C ₂ = Standard valve clearance:

Intake: 0.28 mm (0.011 in)

Exhaust: 0.30 mm (0.012 in)
- Thickness of new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder).
  
  Fig 2: Identifying Valve Lifter Thickness
  Courtesy of SUZUKI OF AMERICA CORP.
  
  Stamp mark "696" indicates 6.96 mm (0.2740 in) in thickness.
  
  NOTE: Available thickness of valve lifter: 26 sizes range 6.96 to 7.46 mm (0.2740 to 0.2937 in) in steps of 0.02 mm (0.0008 in) (when manufactured at factory). Refer to [SERVICE DATA AND SPECIFICATIONS ].
Install the selected valve lifter.
Install camshaft. Refer to [CAMSHAFT: REMOVAL AND INSTALLATION ].
Manually rotate crankshaft pulley a few rotations.
Make sure that the valve clearances for cold engine are within specifications by referring to the specified values.
Installation of the remaining components is in the reverse order of removal.
Start the engine, and check for unusual noise and vibration.