REINFORCEMENT (center) 8J8143 - Caterpillar

Illustration 1 g01430706
Cylinder head
The following bolts are 216 mm (8.5 inch) long: 11, 12, 13, 14, 16, 18, 20, 22, 24 and 26. The following bolts are 198.8 1.0 mm (7.83 0.04 inch) long: 2, 8 and 10. The rest of the bolts are 194 mm (7.6 inch) long.Apply 6V-4876 Lubricant to the bolt threads and both sides of the washers. Tighten the bolts in the following step sequence:
In a numerical sequence, tighten bolts 1 through 26. Torque for bolts ... 270 15 N m (200 11 lb ft)
In a numerical sequence, tighten bolts 1 through 26. Torque for bolts ... 450 15 N m (330 11 lb ft)
In a numerical sequence, again tighten bolts 1 through 26. Torque for bolts ... 450 15 N m (330 11 lb ft)Note: The flatness of the cylinder head should be within a total of 0.13 mm (0.005 inch). Also, the flatness of the cylinder head should be within a maximum of 0.05 mm (0.002 inch) for any 150 mm (5.9 inch) span.
Illustration 2 g01430707 (A) Cylinder Head Thickness Thickness of a new cylinder head ... 120.00 0.15 mm (4.724 0.006 inch)Minimum thickness of a used cylinder head ... 119.50 mm (4.705 inch)
Illustration 3 g01430709
(27) Oil gallery
(28) Bearing joint
(29) Oil holes
(30) Camshaft bearing
Camshaft bearings must be installed into their correct position. Failure to do so will result in engine damage.
Illustration 4 g01430712
(28) Bearing joint
(29) Oil holes Orientation of bearing joint (B) ... 20° 5° above horizontal
Illustration 5 g01430714The depth of installation of the camshaft bearings is very important. Install bearings (30) to the following depths:Installation depth for camshaft bearings (30) C ... 8.0 0.5 mm (0.32 0.02 inch)D ... 178.1 0.5 mm (7.01 0.02 inch)E ... 349.5 0.5 mm (13.76 0.02 inch)F ... 521.0 0.5 mm (20.51 0.02 inch)G ... 692.4 0.5 mm (27.26 0.02 inch)H ... 863.8 0.5 mm (34.01 0.02 inch)I ... 1035.3 0.5 mm (40.76 0.02 inch)