Operation Manual

2. SERVICING SPECIFICATIONS
ENGINE BODY
BX25. RCK54(P)-23BX, RCK60B-23BX. LA240. BT601, WSM
ENGINE
W10138740
Item
Factory Specification Allowable Limit
Compression Pressure
Difference among Cylinders
3.53 to 4.02 MPa
36.0 to 41.0
kgf/cm
2
512 to 583 psi
2.55 MPa
26.0 kgf/cm
2
370 psi
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
Valve Stem
Valve Guide
Clearance
0.0.
1.0.
0.030 to 0.057 mm
0.00118 to 0.00224 in.
5.968 to 5.980 mm
0.23496 to 0.23543 in.
6.010 to 6.025 mm
0.23661
to 0.23720 in.
0.10 mm
0.0039 in.
-
-
Valve Seat Width
Angle
2.12 mm
0.0835 in.
0.785 rad
45
0
-
Valve Face
Angle
0.785 rad
45
0
Valve Spring
Free Length
Tilt
Setting Load
31.3 to 31.8 mm
1.232 to 1.252 in.
-
64.7 N 127.0 mm
6.6 kgf
127.0 mm
14.6 Ibs
11.063 in.
28.4 mm
1.118 in.
1.2mm
0.047 in.
54.9 N
I 27.0 mm
5.6 kgf
127.0 mm
12.31bs
11.063 in.
1-S4