TORQUE SETTINGS
12 4006/8 Diesel, May 1998
NOTE: * Bolt and threads must be lubricated with clean engine oil.
** Cylinder head bolts to be lubricated under the heads, under the washers and
on the threads with P.B.C. (Poly-Butyl-Cuprysil) grease. Important: See Section R10 in the
Workshop Manual before fitting. All other bolt threads only to be lubricated with clean
engine oil. Care must be taken not to oil the heads and faces.
TORQUE SETTINGS
CYLINDER HEAD GROUP lbf.ft Nm
Cylinder head bolt ** (early type) M24 550 750
Cylinder head bolt ** (later (waisted) type) M24 530 723
Rocker shaft bolt/nut M16 90 120
Rocker adjuster nut inlet/exhaust M12 35 50
Rocker adjuster nut pump/injector M14 50 70
Rocker box bolt M10 35 50
Air manifold bolt M10 35 50
Exhaust manifold bolt M10 50 70
Turbocharger V-band clamp nuts M8 8 11
CRANKCASE AND CRANKSHAFT GROUPS
* Main bearing bolt M24 580 783
Side bolts (main bearing caps) M16 124 168
Bolts sump to crankcase M10 40 57
* Connecting rod bolt M16 210 285
Viscous damper botls (4006/8 series) M12 120 160
Flywheel bolts M16 250 340
Front drive adaptor bolts M16 250 340
Balance weight bolt M16 250 340
Front crankshaft pulley bolt M16 250 340
Piston cooling jet bolt M10 7 10
Flywheel housing bolt M10 35 50
Crankcase side bolts M16 200 270
WARNING
IT IS ESSENTIAL THAT THE CORRECT LENGTH OF SCREW OR
BOLT IS USED. INSUFFICIENT LENGTH MAY RESULT IN THE
THREAD BEING STRIPPED, WHEREAS TOO LONG A THREAD MAY RESULT IN
BOTTOMING IN A BLIND HOLE, OR CATCHING ON ADJACENT COMPONENTS.
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