Cummins Engine Repair - Torquing Cylinder Head Bolts

Cummins Engine Repair - Torquing Head Bolts on a Cummins 24 valve turbo diesel. The torque pattern is circular starting from the middle and working both ways to each end of the cylinder head.

Torque Specs Are As Follows:

• 59 ft. lbs.
• 77 ft. lbs.
• Check again at 77 ft. lbs.
• Finally advance each head bolt an additional 90 degrees
• Since each flat side of the "hexagonal" bolt head is 60 degrees [60 X 6 sides=360 degrees]
• One flat and 1/2 = 90 degrees.
  

This is the most important step when replacing any engine cylinder head gasket. If the proper torque specs are not followed bolt stretch [over torqued] or coolant leaks [under torqued] will occur and you'll have to start all over again with your Cummins Engine Repair.

Recommended: Diesel Engine Repair Manuals