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TIGHTENING TORQUES
(1) Special Tightening Torques
For " * " marked screws, bolts and nuts on under table, apply engine oil to their threads and seats before tightening.
 
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Head Bolts & Nuts Main Bearing Main Bearing Case Bolts
  D650
  D750
29 to 32 ft-lbs
  D650
  D750
15 to 17 ft-lbs
  D650
  D750
22 to 25 ft-lbs
 
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Flywheel Bolts Con Rod Bolts ( Big Ends ) Rocker Arm Bracket Studs
  D650
  D750
36 to 40 ft-lbs
  D650
  D750
20 to 22 ft-lbs
  D650
  D750
13 to 15 ft-lbs
 
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Glow Plugs
Drain Plugs
Nozzle Holders Crankshaft Nut
  D650
  D750
15 to 18 ft-lbs
29 to 36 ft-lbs
  D650
  D750
22 to 36 ft-lbs
  D650
  D750
101 to 116 ft-lbs
 
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General Tightening Torques
Screw and bolt material grades are shown by numbers punched on the screw and bolt heads.
Prior to tightening, be sure to check out the numbers as shown below.
None or 4 : Standard grade
7 : Special grade

 

Nominal Diameter

Standard Grade

Special Grade

M6

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

M8

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

M10

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

M12

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

7.9 to 9.3 N m
0.80 to 0.95 kgf m
5.8 to 6.9 ft-lbs

 
     
 
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