Suzuki 2000 Grand Vitara SQ416, Service Manual

Page: 388 / 729

YH4
GRAND
VITARA
6A2-64 ENGINE MECHANICAL (H25 ENGINE)
Valve Springs
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 Standard Limit
Valve spring
Inner
36.08 mm
(1.4204 in.)
35.00 mm
(1.3780 in.)
g
free length
Outer
40.44 mm
(1.5921 in.)
39.22 mm
(1.5441 in.)
Valve spring
Inner
6.9 – 7.9 kg for
27.5 mm
(15.2 – 17.4 lb /
1.08 in.)
5.9 kg for
27.5 mm
(13.0 lb /
1.08 in.)
g
preload
Outer
15.4 – 17.8 kg for
31.7 mm
(33.9 – 39.2 lb /
1.25 in.)
13.3 kg for
31.7 mm
(30.0 lb /
1.25 in.)
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: Inner spring 1.6 mm (0.063 in.)
Outer spring 1.8 mm (0.070 in.)