3412E and C30 Engines Caterpillar

Illustration 1	g00505866

(1) Tighten the three studs to the following torque. ... 35 ± 5 N·m (26 ± 4 lb ft)

(2) There are two plugs on the front of the cylinder block. There are two plugs on the rear of the cylinder block. Apply 5P-3413 Pipe Sealant on the threads of the plugs before assembly.

(3) The dowels extend from the cylinder block. Distance ... 18.5 ± 0.5 mm (0.73 ± 0.02 inch)

(4) The gasket that is between the cylinder block and the top plates is the following thickness. ... 0.208 ± 0.025 mm (.0082 ± .0010 inch)

(5) Thickness of the top plates ... 8.585 ± 0.025 mm (.3380 ± .0010 inch)

(6) Bore in the cylinder block for the camshaft bearings ... 76.835 ± 0.018 mm (3.0250 ± 0.0007 inch)

(7) Put 5P-3413 Pipe Sealant on the threads of the plugs before assembly. Tighten the plug that is in the front of the block and tighten the plug that is in the rear of the block to the following torque. ... 80 ± 15 N·m (60 ± 10 lb ft)

(8) Bore in cylinder block for main bearings (with main bearing caps torqued):

New bearings that are standard size ... 129.891 ± 0.013 mm (5.1138 ± 0.0005 inch)

Bearings that are 0.64 mm (.025 inch) larger than the standard size ... 130.526 ± 0.013 mm (5.1388 ± 0.0005 inch)

(9) There are two dowels that are in the front of the cylinder block. There are two dowels that are in the rear of the cylinder block. The dowels project from the cylinder block. Distance ... 19.0 ± 0.5 mm (.75 ± .02 inch)

(10) The width of the slot for the main bearing caps is the following value. ... 215.900 ± 0.013 mm (8.5000 ± .0005 inch)

Width of main bearing cap ... 215.900 ± 0.025 mm (8.5000 ± 0.0010 inch)

Clearance between slot and main bearing cap (with main bearing caps torqued):

Tight ... 0.019 mm (0.0007 inch)

Loose ... 0.019 mm (0.0007 inch)

(11) Use the procedure that follows to install the main bearing caps.

Illustration 2	g00285128
Marks For Tightening Main Bearings

1. Apply 4C-5593 Anti-Seize Compound on the threads of the bolts.

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

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

3. Tighten the bolts on the opposite side.

   Torque for bolts ... 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 side from the mark to the following value.

   Angle from the mark. ... 120 ± 5 degrees

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

   Angle from the mark. ... 120 ± 5 degrees

Illustration 3	g00505869

(12) The distance from the centerline of the crankshaft bearing bore to the top of the cylinder block is the following value. ... 419.10 ± 0.15 mm (16.500 ± .006 inch)

(13) The distance from the centerline of the crankshaft bearing bore to the bottom of the cylinder block is the following value. ... 165.10 ± 0.10 mm (6.500 ± .004 inch)