wsm wg972-e4, Workshop Manual

Page: 97 / 153

ENGINE
WG972-E4, WSM
1-S6
2. SERVICING SPECIFICATIONS
ENGINE BODY
Item Factory Specification Allowable Limit
Valve Clearance (Cold) 0.145 to 0.185 mm
0.00571 to 0.00728 in.
–
Compression Pressure –
Variance Among
Cylinder
1.27 MPa
13.0 kgf/cm
2
185 psi
–
0.88 MPa
9.0 kgf/cm
2
130 psi
10 % or less
Top Clearance 1.15 to 1.35 mm
0.0453 to 0.0532 in.
–
Cylinder Head Surface Flatness – 0.05 mm
0.002 in.
Valve Recessing (Intake and Exhaust) 0.10 (protrusion) to
0.10 (recessing) mm
0.0039 (protrusion) to
0.0039 (recessing) in.
0.30(recessing) mm
0.012(recessing) in.
Valve Stem to Valve Guide (Inlet)
• Valve Stem
• Valve Guide
Valve Stem to Valve Guide (Exhaust)
• Valve Stem
• Valve Guide
Clearance
O.D.
I.D.
Clearance
O.D.
I.D.
0.030 to 0.060 mm
0.0012 to 0.0024 in.
5.965 to 5.980 mm
0.2348 to 0.2354 in.
6.010 to 6.025 mm
0.2367 to 0.2372 in.
0.030 to 0.057 mm
0.0012 to 0.0022 in.
5.968 to 5.980 mm
0.2350 to 0.2354 in.
6.010 to 6.025 mm
0.2367 to 0.2372 in.
0.10 mm
0.0039 in.
–
–
0.10 mm
0.0039 in.
–
–
Valve Face Angle 0.79 rad
45 °
–
Valve Seat Angle 0.79 rad
45 °
–
Valve Timing (Intake Valve) Open
Close
0.35 rad
20 °
before T.D.C.
0.79 rad
45 °
after B.D.C.
–
–
Valve Timing (Exhaust Valve) Open
Close
0.87 rad
50 °
before B.D.C.
0.26 rad
15 °
after T.D.C.
–
–
KiSC issued 07, 2015 A