GZD15, WSM ENGINE
1-S4
2. SERVICING SPECIFICATIONS
ENGINE BODY
Item Factory Specification Allowable Limit
Compression Pressure 3.53 to 4.02 MPa
36.0 to 41.0
512 to 583 psi
2.55 MPa
26.0
370 psi
Variance Among
Cylinder
10 % or less
Top Clearance 0.50 to 0.70 mm
0.0197 to 0.0276 in.
Valve Clearance (Cold) 0.145 to 0.185 mm
0.00571 to 0.00728 in.
Cylinder Head Surface Flatness 0.05 mm
0.0020 in.
Valve Recessing (Intake and Exhaust) -0.10 to 0.10 mm
-0.0039 to 0.0039 in.
0.30 mm
0.0118 in.
Valve Stem to Valve Guide Clearance 0.030 to 0.057 mm
0.00118 to 0.00224 in.
0.10 mm
0.0039 in.
Valve Stem
(O.D.)
5.968 to 5.980 mm
0.23496 to 0.23543 in.
Valve Guide
(I.D.)
6.010 to 6.025 mm
0.23661 to 0.23720 in.
Valve Face Angle 0.785 rad.
45
Valve Seat Angle 0.785 rad.
45
Width 2.12 mm
0.0835 in.
Valve Spring Free Length 31.3 to 31.8 mm
1.232 to 1.252 in.
28.4 mm
1.118 in.
Tilt 1.2 mm
0.047 in.
Setting Load /
Setting Length
64.7 N / 27.0 mm
6.6 kgf / 27.0 mm
14.6 lbs / 1.063 in.
54.9 N / 27.0 mm
5.6 kgf / 27.0 mm
12.3 lbs / 1.063 in.
Rocker Arm Shaft to Rocker Arm Oil Clearance 0.016 to 0.045 mm
0.00063 to 0.00177 in.
0.15 mm
0.0059 in.
Rocker Arm Shaft
(O.D.)
10.473 to 10.484 mm
0.41232 to 0.41276 in.
Rocker Arm
(I.D.)
10.500 to 10.518 mm
0.41339 to 0.41410 in.
0000001400E
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