SPECIFICATIONS
Page 307
Fasteners Examples
Reusable
Limit Reuse Recommendations
Highly loaded screws
(Phosphating plus oil)
Cylinder head
Cylinder block
Camshaft bearing housing
Transmission (except adjustable
idler gear)
Flywheel
5 times Apply engine oil on threads and
under screw head.
Mark bolt head with an
indentation.
Dry mounting for new screws
(delivered with oil pre-applied and
anti-rust treatment for spare
parts).
If a part is replaced, e.g., cylinder
head, also replace the screws.
Injector clamp
Adjustable idler gear
Do not reuse
Highly loaded screws
(Phosphating plus oil)
Connecting rods 5 times Apply clean engine oil.
Special screws (specific shape) Oil pan and valve cover No limit No limit if no cracks, corrosion or
damage to the flat surfaces.
Flange head screws EGR valve Do not reuse
Flange head screws Exhaust manifold Do not reuse
Stainless steel/bronze studs and
flange locknuts (Spiralock)
Turbocharger 5 times If turbocharger is replaced, also
replace the studs and nuts.
Prevailing torque feature screws
(Dri-Loc Plastic or Tuflock)
Piston cooling nozzles
Timing gear plate
Do not reuse
Standard screws Property class 8.8 No limit No limit if no cracks, corrosion or
damage to the flat surfaces.
Standard screws Property class 10.9
Property class 12.9
No limit No limit if no cracks, corrosion or
damage to the flat surfaces.
V-nipples with taper thread With locking fluid pre-applied Do not reuse Before fitting the new nipple,
clean the hole with a nipple tap
and apply sealant on the nipple
thread, or use a new, coated
nipple.
Taper plugs or nipples With sealer fluid pre-applied Do not reuse Before fitting the new nipple,
clean the hole with a nipple tap
and apply sealant on the nipple
thread, or use a new, coated
nipple.
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