WEICHAI WP12 - Page 45

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TIGHTENING TABLE AND TORQUE VALUES FOR MAIN FASTENERS
DESCRIPTIONS
SPECIFICATIONS
(SIZE – GRADE)
REQUIREMENTS
ALLOWABLE
TIMES
TO REUSE
Main bearing bolt M18X169 - 10.9 140N.m+210° 2
Crankcase secondary bolt M8X 25 - 8.8
M8X210 - 8.8
8N.m+30
2
Cylinder head main bolt M14X185 - 10.9 60N.m+2×120° 3
Cylinder head secondary
bolt
M12×1.5X195 - 8.8 20+10N.m Seal
with Loctite 262
Sealant
3
Cylinder head secondary
nut
25N.m+2×120°
3
Crankshaft pulley bolt M12×1.5X75 - 10.9 45N.m+135° 2
Bolt for tensional
vibration damper
M10X30 - 8.8 15N.m+30°
2
Flywheel bolt M16×1.5X
120-10.9
105N.m+270°
2
Connecting rod bolt
M14×1.5X
67.5 - 10.9
115N.m+90°
(Manual
tightening)
0
80N.m+153°
(Automatic
tightening)
Idler gear bolt pin M12×1.5X90 - 10.9 105N.m 0
Injector clamping bolt M8X50 - 8.8 8N.m+90 3
Camshaft gear bolt M8X30 - 8.8 8N.m+120° 2
Piston cooling injector bolt M10X25 30N.m 0
Exhaust manifold bolt M10X65 15N.m+60° 2
Standard torque table
Bolt size Grade Torque value Grade
Torque
Value
Standard M6 bolt 8.8 8 Nm 10.9 13 Nm
Standard M8 bolt
8.8 22 Nm 10.9 31 Nm
Standard M10
bolt
8.8 39 Nm 10.9 58 Nm
Standard M12
bolt
8.8 70 Nm 10.9 100 Nm
Table 5.3