DETROIT DIESEL 53
Specifications 1.0
STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
THREAD
TORQUE
THREAD
TORQUE
SIZE
(lb-ft)
SIZE
(lb-ft)
1/4 -20..................................................7-9
9/16-12 ....................................................... 90-100
1/4 -28..................................................8-10
9/16-18 ..................................................... 107-117
5/16-18.................................................13-17
5/8-11 ........................................................ 137-147
5/16-24.................................................15-19
5/8-18 ........................................................ 168-178
3/8-16...................................................30-35
-10 .......................................................... 240-250
3/8-24...................................................35-39
-16 .......................................................... 290-300
7/16-14.................................................46-50
7/8-9 .......................................................... 410-420
7/16-20.................................................57-61
7/814 ........................................................ 475-485
1/2-13...................................................71-75
1-8 ............................................................. 580-590
1/2-20 ..................................................83-93
1-14 ........................................................... 685-695
EXCEPTIONS TO STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
APPLICATION
THREAD
TORQUE
SIZE
(Ib-ft)
Injector control shaft bracket bolts..............................................................................
................10-12
Cam follower guide bolts............................................................................................
1/4-20................12-15
Governor to flywheel housing bolts.............................................................................
5/16-18................10-12
Idler gear hub and spacer bolts ..................................................................................
5/16-18................19-23
Oil pan bolts ..............................................................................................................
5/16-18................10-12
Idler gear hub and spacer bolts .................................................................................
3/8-16................40-45
Injector clamp bolts ...................................................................................................
3/8-16................20-25
Air box cover bolts (in-line engine) .............................................................................
3/8-16................12-16
Flywheel housing bolts ..............................................................................................
3/8-16................25-30
Flywheel housing bolts ..............................................................................................
3/8-24................25-30
Connecting rod nuts (in-line engine) ..........................................................................
3/8-24 ...............40-45
Fuel line nuts ............................................................................................................
3/8-24 ...............12-15
Fuel connector ..........................................................................................................
3/8-24 ...............20-28
Rocker arm bracket bolts .........................................................................................
7/16-14................50-55
*Flywheel bolts ..........................................................................................................
-20 ...........110-120
*Main bearing cap bolts .............................................................................................
9/16-12............ 120-130
*Cylinder head bolts .................................................................................................
5/8-11............ 170-180
Flange mounted air compressor drive shaft nut .........................................................
3/4-10.......................
Crankshaft end bolt (in-line engine)............................................................................
3/4-16............ 290-300
Air compressor drive pulley nut .................................................................................
3/4-16..............80-100
Crankshaft end bolt (engines with cone mounted pulley
stamped with letter "A" .........................................................................................
1
-14............200-220
Camshaft and balance shaft nut ..............................................................................
1-1/8-18 ...........300-325
* Lubricate at assembly with international Compound No. 2, or equivalent (refer to Parts Catalog or Microfiche, Section 12.8000A).
100 Ib-ft plus increase torque to line-up cotter pin.
Page 8