SEAL ASSEM. 3J7782 - Caterpillar

Illustration 1 g01025006
(1) Bolts (3/8 inch) (2) Bolts (3/4 inch)Use the following procedure to tighten the cylinder head bolts:
Apply clean engine oil to the threads of the bolts before assembly.
Tighten bolt (1) through bolt (20) in the numerical sequence to 270 25 N m (200 20 lb ft).
Tighten bolt (1) through bolt (20) in the numerical sequence to 450 45 N m (332 33 lb ft).
Again, tighten bolt (1) through bolt (20) in the numerical sequence to 450 45 N m (332 33 lb ft).
Install the rocker arm shafts.
Tighten bolt (21) through bolt (26) in the numerical sequence to 270 25 N m (200 20 lb ft).
Tighten bolt (21) through bolt (26) in the numerical sequence to 450 45 N m (332 33 lb ft).
Again, tighten bolt (21) through bolt (26) in the numerical sequence to 450 45 N m (332 33 lb ft).
Tighten the 3/8 inch bolts (2) to 45 7 N m (33 5 lb ft). (3) Torque for studs ... 35 5 N m (26 4 lb ft)
Illustration 2 g02177644
(A) Thickness of new cylinder head ... 112.78 0.25 mm (4.440 0.010 inch)
Illustration 3 g02177646
Note: Before installation, apply Loctite Hi-Temp Flange Sealant to the seating surface of the plug. (D) Installation depth of plugs (5) ... 2.0 0.5 mm (0.08 0.02 inch) (E) Installation depth of plugs (6) ... 2.0 0.5 mm (0.08 0.02 inch) (F) Installation depth of plugs (7) ... 4.5 0.5 mm (0.18 0.02 inch) (G) Installation depth of plugs (8) ... 2.0 0.5 mm (0.08 0.02 inch)