Suzuki WagonR+ RB310 Service Manual page 2523

6A1-48 ENGINE MECHANICAL
D Distortion of manifold seating faces:
Check seating faces of cylinder head for manifolds, using a
straightedge and thickness gauge, in order to determine whether
these faces should be corrected or cylinder head replaced.
Limit of distortion: 0.10 mm (0.004 in.)
Valve Springs
D Referring to data given below, check to be sure that each spring
is in sound condition, free of any evidence of breakage or weak-
ening. Remember, weakened valve springs can cause chatter,
not to mention possibility of reducing power output due to gas
leakage caused by decreased seating pressure.
Item
Valve spring
free length
Valve spring
preload
D Spring squareness:
Use a square and surface plate to check each spring for square-
ness in terms of clearance between end of valve spring and
square. Valve springs found to exhibit a larger clearance than limit
given below must be replaced.
Valve spring squareness limit: 1.6 mm (0.063 in.)
Standard
36.83 mm
(1.4500 in.)
10.7 – 12.5 kg for
31.5 mm
(23.6 – 27.5 lb/
(20.5 lb/1.24 in.)
1.24 in.)
Limit
35.67 mm
(1.4043 in.)
9.3 kg for
31.5 mm