Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
11
No. Description
N．m
58 Tightening socket nut 30
59 Bolt and nut of starter motor 81
60 Fixing nut of starter cable 9
61 Exhaust branch pipe bolt 30
62 Bolt of heat shield 25
63 Support bolt 40
64 Front exhaust pipe nut 40
65 Crankshaft belt pulley bolt 210
66 Exhaust pipe nut 67
67 Torque of engine bracket bolt
M10：40
M12：69
68 Cylinder head cover nut 13
69 Connecting nut between turbocharger and exhaust
manifold
25
70 Connecting bolt between exhaust manifold and
cylinder head
30
71 Bolt of exhaust pipe heat shield 25
72 Connecting bolt of turbocharger air bleeding pipe 25
73 Perforated bolt of lubricating oil pipe
M12：41
M14：55
Comparison Table for Standard Bolt Specification and Tightening Torque ☆
Bolt Identification
Torque (N.m)
Specification
Less than grade 8.8
(low carbon steel)
Grade 8.8 (High
carbon steel)
Grade 10.9 (Alloy
steel)
M6×1.0 4~8 5~10 .......
M8×1.25 8~18 12~23 17~31
M10×1.25 21~35 28~47 38~64
M10×1.5 20~34 28~46 37~61
M12×1.25 50~75 62~93 77~116
M12×1.75 46~70 58~86 73~109
M14×1.5 78~117 95~142 116~174
M12×2.0 73~109 90~134 109~163
M16×1.5 106~160 138~208 163~245
M16×2.0 102~152 132~198 156~234
M18×1.5 154~230 199~299 234~352
M20×1.5 210~316 275~413 323~485
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