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SPECIFICATIONS
Standard Bolts, Property Class 8.8
Engine Component Torque
Specifications (Critical Fasteners)
All components are to be clean and free from
foreign material or corrosion. Assemblies are to
be made using suitable tools and procedures so
that no permanent damage occurs as a result of
the assembly.
Threads, washers, under head of screw and
washer face of nuts should be lubricated with
clean engine oil unless otherwise specified.
The following listed fasteners require the use of a
calibrated manual torque
wrench. If an adapter is
required in combination with a torque wrench, a
correction factor must be applied to the torque
wrench readings in order to obtain accurate
fastener torque values.
Fasteners noted by an asterisk (*) require
retorque after engine run-in.
FASTENER REUSE
Repeated tightening of fasteners and threaded
components reduces their capacity to function
adequately. The following table describes the
various items and the limits of their reusability.
Failure to conform to these limits may result in
severe component damage.
General Tightening Torque
M6 10 ±1 N•m (7 ±1 lb-ft)
M8 24 ±4 N•m (18 ±3 lb-ft)
M10 48 ±8 N•m (35 ±6 lb-ft)
M12 85 ±15 N•m (63 ±11 lb-ft)
M14 140 ±25 N•m (103 ±18 lb-ft)
M16 190 ±35 N•m (140 ±26 lb-ft)
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