Vitara JS (2Dr) 2WD L4-1.6L DOHC MFI (1999)
If tip of adjusting screw is badly worn, replace it.
Rocker arm must be replaced if its cam-riding face is badly worn.
Rocker Arm Shaft Runout
Using "V" blocks and dial gauge, check runout. If runout exceeds its limit, replace rocker arm shaft.
Runout limit: 0.20 mm (0.008 inch)
Rocker Arm-to-Rocker Arm Shaft Clearance
Using a micrometer and a bore gauge, measure rocker shaft dia. and rocker arm I.D.
Difference between two readings is arm-to-shaft clearance on which a limit is specified.
If limit is exceeded, replace shaft or arm, or both.