Tightening torque of Kubota engines.

 

Kubota tightening torques

General information on the tightening torques of all Kubota engines.

 

  • An important rule is that the head bolts must first be oiled, on which the correct NM can then be measured with the torque wrench.

Tuning of all 05 engines:

  • D905, D1005, D1105
  • V1205, V1305, V1505

Valve clearance when the engine is cold:

  • 0.145 to 0.185mm
  • 0.00571 to 0.00728 inch

Head bolts:

  • 63.7nm to 68.6nm
  • 6.5 to 7KGF
  • 47.0 to 50.6 FT-LBS

Main bearing bolt

  • Bolt 1 29.4nm to 34.3
  • Bolt 2 49.0 to 53.9nm

Glow plug:

  • 7.8 to 14.7 nm
  • 0.8 to 1.5KGf
  • 5.8 to 10.8 FT-LBS

Tuning of all 03 engines

  • D1503, D1703
  • V2003, V2203, V2403

Valve clearance when the engine is cold:

  • 0.18 to 0.22mm
  • 0.0071 to 0.0087 inch

Head bolts:

  • 93.1nm to 98nm
  • 9.5 to 10.0KGF
  • 68.7 to 72.3 FT-LBS

Main bearing bolt

  • Bolt 1 46.1 to 50.9
  • Bolt 2 68.6 to 73.5nm

Glow plug:

  • 19.6 to 24.5 nm
  • 2.0 to 2.5KGf
  • 14.5 to 18.1 FT-LBS

Tuning of all 02 engines

  • Z402, Z482
  • D622, D722, D782

Valve clearance when the engine is cold:

  • 0.145 to 0.185mm
  • 0.00571 to 0.00728 inch


Head bolts:

  • 37.3nm to 42.2nm
  • 3.8 to 4.3KGF
  • 27.5 to 31.1 FT-LBS

Main bearing bolt

  • Bolt 1 12.7 to 15.7nm
  • Bolt 2 26.5 to 30.4nm

Glow plug:

  • 7.85 to 14.7 nm
  • 0.8 to 1.5KGf
  • 5.8 to 10.8 FT-LBS

 

General rule for bolts by size

 

Tightening torque and sequence of the Z750 Engine Kubota

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