Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 535

6A4-46 ENGINE MECHANICAL (J20 ENGINE)
If measured camshaft journal clearance exceeds limit, measure
journal (housing) bore and outside diameter of camshaft journal.
Replace camshaft or cylinder head assembly whichever the differ-
ence from specification is greater.
Camshaft journal bore dia. (intake and exhaust)
Standard : 26.000 – 26.033 (1.0237– 1.0249 in.)
Camshaft journal outside diameter (intake and exhaust)
Standard : 25.934 – 25.955 (1.0211 – 1.0218 in.)
Wear of Hydraulic Valve Lash Adjuster
Check adjuster for pitting, scratches, or damage.
If any malcondition is found, replace.
Measure cylinder head bore and adjuster outside diameter to
determine cylinder head-to-adjuster clearance. If clearance
exceeds limit, replace adjuster or cylinder head.
Hydraulic valve lash adjuster outside diameter
Standard: 30.959 – 30.975 mm (1.2189 – 1.2194 in.)
Cylinder head bore
Standard: 31.000 – 31.025 mm (1.2205 – 1.2214 in.)
Cylinder head to adjuster clearance
Standard: 0.025 – 0.066 mm (0.0010 – 0.0025 in.)
Limit: 0.15 mm (0.0059 in.)