Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 534

Camshaft Journal Wear
Check camshaft journals and camshaft housings for pitting,
scratches, wear or damage.
If any malcondition is found, replace camshaft or cylinder head
with housing. Never replace cylinder head without replacing hous-
ings.
Check clearance by using gaging plastic. The procedure is as fol-
lows.
1) Clean housings and camshaft journals.
2) Make sure that all valve lash adjusters are removed and
install camshaft to cylinder head.
3) Place a piece of gaging plastic the full width of journal of
camshaft (parallel to camshaft).
4) Install camshaft housing.
5) Tighten camshaft housing bolts in such order as indicated in
figure a little at a time till they are tightened to specified
torque.
NOTE:
Do not rotate camshaft while gaging plastic is installed.
Tightening torque
Camshaft housing bolt
(a) : 11 N·m (1.1 kg-m, 8.0 lb-ft)
6) Remove housing, and using scale (2) on gaging plastic (1)
envelop, measure gaging plastic width at its widest point.
Camshaft journal clearance
Standard : 0.045 – 0.099 mm (0.0018 – 0.0038 in.)
Limit : 0.12 mm (0.0047 in.)
ENGINE MECHANICAL (J20 ENGINE) 6A4-45