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American-Lincoln 1 - 35
91 WS
STANDARD METRIC TORQUE VALUES
When tightening torques are not specified, tighten the bolts and nuts according to the table below.
GRADE No-Grade or 4T 7T 9T
SS41, S20C S43C, S48C SCR435, SCM435
Nom. Unit N.m kgf.m ft-lbs N.m kgf.m ft-lbs N.m kgf.m ft-lbs
Dia.
M6 7.85 0.80 5.79 9.81 1.00 7.23 12.26 1.25 9.04
(6mm, 0.24 in.) to to to to to to to to to
9.32 0.95 6.87 11.28 1.15 8.32 14.22 1.45 10.49
M8 17.7 1.8 13.0 23.5 2.4 17.4 29.4 3.9 21.7
8mm, 0.31 in.) to to to to to to to to to
20.6 2.1 15.2 27.5 2.8 20.3 34.3 3.5 25.3
M10 39.2 4.0 28.9 48.1 4.9 35.4 60.8 6.2 44.8
(10mm, 0.39 in.) to to to to to to to to to
45.1 4.6 33.3 55.9 5.7 41.2 70.6 7.2 52.1
M12
62.8 6.4 46.3 77.5 7.9 57.1 103.0 10.5 75.9
(12mm, 0.47 in.) to to to to to to to to to
72.6 7.4 53.5 90.2 9.2 66.5 117.7 12.0 86.8
ENGINE TORQUE VALUES
Screws, bolts and nuts must be tightened to the specified torque using a torque wrench. Several
screws, bolts, and nuts such as those used on the cylinder head must be tightened in proper
sequence and at the proper torque.
ITEM Size & Pitch N.m kgf.m ft-lbs
*Head Cover Cap Nuts M6 x 1.0 3.9 to 5.9 0.4 to 0.6 2.9 to 4.3
*Head Bolts M8 x 1.25 37.2 to 42.1 3.8 to 4.3 28.9 to 32.5
*Bearing Case Bolts 1 M6 x 1.0 12.7 to 15.7 1.3 to 1.6 9.4 to 11.6
*Bearing Case Bolts 2 M7 x 1.0 26.5 to 30.4 2.7 to 3.1 19.6 to 22.5
*Flywheel Bolts M10 x 1.25 53.9 to 58.8 5.5 to 6.0 39.8 to 43.4
*Connecting Rod Bolts M6 x 0.75 26.5 to 30.4 2.7 to 3.1 10.8 to 13.7
*Rocker Arm Bracket Bolts M6 x 1.0 9.81 to 11.28 1.00 to 1.15 7.23 to 8.32
*Idler Gear Shaft Bolts M6 x 1.0 9.81 to 11.28 1.00 to 1.15 7.23 to 8.32
Spark Plugs M14 x 1.25 19.6 to 24.5 2.0 to 2.5 14.5 to 18.1
Drain Plugs M12 x 1.25 32.4 to 37.3 3.3 to 3.8 23.9 to 27.5
Oil Switch Taper Bolt PT 1/8 14.7 to 19.6 1.5 to 2.0 10.8 to 14.5
*Crankshaft Bolt M12 x 1.5 98.1 to 107.9 10.0 to 11.0 72.3 to 79.6
For "*" marked bolts and nuts in the table, apply engine oil to their threads and seats before
tightening.
Screw and bolt material grades are shown by numbers punched on the screw and bolt heads.
C-2005
STANDARD HARDWARE & TORQUE VALUES