3116 and 3126 Truck Engines Cylinder Head

(1) Large bolts (M20)

(2) Small bolts (M10)

Instructions for installing bolts (1) and (2): Put engine oil on the threads of the bolts and tighten them as follows:

a. Tighten bolt (1) through bolt (14) in a numerical sequence to a torque of … 300 ± 15 N·m (221 ± 11 lb ft)

b. Loosen bolt (1) through bolt (14) until the washers are loose under the bolt heads.

c. Tighten bolt (1) through bolt (14) in a numerical sequence to a torque of … 130 ± 15 N·m (95 ± 11 lb ft)

d. Again tighten bolt (1) through bolt (14) in a numerical sequence to a torque of … 130 ± 15 N·m (95 ± 11 lb ft)

e. Turn bolt (1) through bolt (14) in a numerical sequence for an additional 90 degrees (1/4 turn).

f. Tighten bolt (15) through bolt (20) in a numerical sequence to a torque of … 55 ± 7 N·m (41 ± 5 lb ft)

(3) Depth that all cup plugs are installed (measured from head face to top edge of plug) … 1.25 ± 0.25 mm (0.049 ± 0.010 in)


Cylinder Head Cross Section

(4) Sleeve. For replacement of a hydraulic unit injector sleeve, refer to Using The 122-7093 Sleeve Replacement Tool Group, Special Instruction SEHS9120.

(5) Height of cylinder head (new) … 103.00 ± 0.20 mm (4.055 ± 0.008 in)

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