C15 On-Highway Engine Caterpillar

Illustration 1	g01352180
Right Side View

Note: Apply 4C-4032 Bearing Mount Compound to the dowel before installation.

(1) The dowel extends above the top surface of the cylinder block by the following distance. ... 18.5 ± 0.5 mm (0.73 ± 0.02 inch)

(2) Spacer plate

Thickness of the spacer plate ... 8.585 ± 0.025 mm (0.3380 ± 0.0010 inch)

Thickness of the gasket that is placed between the spacer plate and the cylinder block ... 0.20 ± 0.02 mm (0.008 ± 0.001 inch)

Cylinder liner projection above the spacer plate ... 0.025 to 0.152 mm (0.0010 to 0.0060 inch)

(3) The dowel extends above the top surface of the cylinder block by the following distance. ... 16.0 ± 0.5 mm (0.63 ± 0.02 inch)

Note: Apply 4C-4032 Bearing Mount Compound to the dowel before installation.

(4) The dowel extends above the top surface of the cylinder block by the following distance. ... 20.0 ± 0.5 mm (0.79 ± 0.02 inch)

(5) The dowels extend past the end of the cylinder block by the following distance. ... 19.1 ± 0.5 mm (0.75 ± 0.02 inch)

(6) The dowels extend past the end of the cylinder block by the following distance. ... 37.3 ± 0.5 mm (1.47 ± 0.02 inch)

(7) Torque for the plug ... 70 ± 10 N·m (50 ± 7 lb ft)

Illustration 2	g01323511
View A-A

Illustration 3	g01303510
Section B-B

(8) Lubricate the O-ring seal and the bore with clean engine oil.

Illustration 4	g01352184
Front View

(C) Bore in the cylinder block for the main bearings ... 129.891 ± 0.013 mm (5.1138 ± 0.0005 inch)

(D) Dimension from the centerline of the crankshaft bearing bore to the top of the cylinder block

New ... 425.45 mm (16.750 inch)

Minimum ... 425.02 mm (16.733 inch)

Note: The total flatness of the top contact surface of the cylinder block must be within 0.10 mm (0.004 inch). The flatness must also be within 0.05 mm (0.002 inch) for any 150 mm (6 inch) section of the surface.

(E) Main bearing cap

Main bearing cap width ... 215.900 ± 0.025 mm (8.5000 ± 0.0010 inch)

Width of the cylinder block for the main bearing cap ... 215.900 ± 0.020 mm (8.5000 ± 0.0008 inch)

(F) New dimension from the centerline of the crankshaft bearing bore to the bottom of the cylinder block pan rails ... 165.1 mm (6.50 inch)

(9) Main bearing cap bolts

Illustration 5	g01352189
Torque-turn tightening method for main bearing cap bolts

Use the following procedure in order to tighten the main bearing cap bolts:

1. Apply clean engine oil to the threads of the bolts.

2. Tighten the bolts first on the bearing tab side (11) of the cap.

   Torque ... 258 ± 14 N·m (190 ± 10 lb ft)

3. Tighten the bolts on the opposite end (10) of the cap.

   Torque ... 258 ± 14 N·m (190 ± 10 lb ft)

4. Put a mark on each bolt and each cap.

5. Tighten the bolts on the opposite end of the bearing tab (10) from the mark to angle (G) .

   Angle (G) ... 120 ± 5 degrees (2 flats)

6. Tighten the bolts on the bearing tab side (11) of the cap from the mark to the following value.

   Angle (G) ... 120 ± 5 degrees (2 flats)

Illustration 6	g01352194
Right Side View (12) Straight thread O-ring plug

(13) Piston cooling jet

Minimum permissible clearance between the piston, the piston cooling jet, and the crankshaft ... 0.63 mm (0.025 inch)

Note: To prevent damage to the piston cooling jets during service, the piston cooling jets must be removed.