Suzuki Engine 2002 GRAND VITARA SQ625, Руководство по обслуживанию

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6A4-58 ENGINE MECHANICAL (J20 ENGINE)
Valve Springs
• Referring to data given below, check to be sure that each
spring is in sound condition, free of any evidence of break-
age 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 specification
• 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 given below must be replaced.
Valve spring squareness limit
2.0 mm (0.079 in.)
ASSEMBLY
1) Before installing valve guide into cylinder head, ream guide
hole with special tool (11 mm reamer) so as to remove burrs
and make it truly round.
Special tool
(A) : 09916-34542
(B) : 09916-38210
Item Standard Limit
Valve spring
free length
Inner
36.08 mm
(1.4204 in.)
35.00 mm
(1.3779 in.)
Outer
40.44 mm
(1.5921 in.)
39.22 mm
(1.5440 in.)
Valve spring
preload
Inner
6.9 – 7.9 kg for
27.5 mm
(15.2 – 17.4 lb/
1.08 in.)
6.2 kg for
27.5 mm
(13.6 lb/
1.08 in.)
Outer
15.4 – 17.8 kg for
31.7 mm
(33.9 – 39.2 lb/
1.25 in.)
13.8 kg for
31.7 mm
(30.4 lb/
1.25 in.)