Valve Spring Inspection - Suzuki Liana RH413 Service Manual

1D-35 Engine Mechanical:
• 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 for cylinder head surface on
intake and exhaust manifold
0.05 mm (0.002 in.)

Valve Spring Inspection

• Referring to data, check to be sure that each spring is
in standard condition, free of any evidence of
breakage or weakening. Remember, weakened valve
springs can cause chatter, not to mention possibility of
reducing power output due to gas leakage caused by
decreased seating pressure.
Valve spring free length
Standard: 36.83 mm (1.450 in.)
Limit: 35.83 mm (1.411 in.)
Valve spring preload
Standard: 107 – 125 N (10.7 – 12.5 kg) for 31.50
mm (23.6 – 27.6 lb/1.240 in.)
Limit: 102 N (10.2 kg) for 31.50 mm (22.5 lb/1.240
in.)
I2RH0B140106-01
• Spring squareness:
Use a square and surface plate to check each spring
for squareness in terms of clearance between end of
valve spring and square. Valve springs found to
exhibit a larger clearance than limit must be replaced.
Valve spring squareness
Limit: 1.6 mm (0.063 in.)
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