Yanmar 1GM10, Shop Manual

Page: 143 / 240

MULTICYLINDER ENGINES 137
Table 3 ENGINE SPECIFICATIONS (3HM AND (continued)
Valve stem clearance (continued)
Max. stem clearance 0.15 (0.006
Valve stem diameter 7.000 (0.2756
Valve stem wear limit
6.900 (0.2717
Valve stem runout-max.
0.03 (0.0012 in.)
Valve guide diameter
7.000 (0.2756
Valve guide wear limit 7.080 (0.2878 in.)
Valve guide protrusion 7.0 (0.276 in.)
Valve spring
Standard free length
38.5 (1.52 in.)
Mln. free length
37 (1.46 in.)
Installed height
30.2 (1.19
Pressure and height
14.43 kg at 30.2 (31.81 Ib. at 1.19 in.)
Rocker arm shaft clearance 0.016-0.052 (0.0006-0.0020 in.)
Rocker arm shaft
0.15 (0.006 In.)
Rocker arm bore wear
14.10 mm (0.555 in.)
Rocker arm shaft wear limit
13.90 (0.547 in.)
Oil pump
Inner rotor rotor tip 0.050-0.105 (0.0020-0.0041 In.)
Max. 0.15 (0.006 in.)
Outer rotor-to-pump body
0.050-0.105 (0.0020-0.0041 in.)
Max. 0.15 (0.006 in.)
Rotor side clearance 0.030-0.080
Max. 0.13 (0.005 in.)
Shaft clearance
0.015-0.050 (0.0006-0.0020
Max. 0.20 (0.0079
Table 4 TIGHTENING TORQUES
Fastener in.-lb.
Connecting rod 25 18 21 6
Cylinder head
30 22
120 88
M8 30 22
130 95
Exhaust elbow 45 33
Exhaust manifold 45 33
Flywheel
65-70 48-51
bearing housing
30-35 22-25
45-50 33-36
Retaining (set) bolt 45-50 33-36
Rear main bearing housing 25 18
Timing
15 11
Oil pump
8 17