3408C ENGINE FOR CATERPILLAR BUILT MACHINES Caterpillar


Cylinder Block

Usage:

(1) Torque for three studs to hold the water pump ... 27 ± 4 N·m (20 ± 3 lb ft)

(2) Plug (two on front and two on rear). See note below.

(3) Length of dowels (four) out of the block face ... 18.5 ± 0.5 mm (.73 ± .02 in)

(4) Thickness of the gasket between the cylinder block and top plates ... 0.208 ± 0.025 mm (.0082 ± .0010 in)

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

(6) Make reference to Cylinder Liner Projection, for the height of the liner.

(7) Bore in the block for the camshaft bearings (five bores) ... 76.835 ± 0.018 mm (3.0250 ± .0007 in)

(8) Torque for one plug on front and two on rear of the block (see note below) ... 80 ± 15 N·m (60 ± 10 lb ft)

(9) Bore in the block for the main bearings (with main bearing caps torqued):

Standard, original size (new) ... 129.891 ± 0.013 mm (5.1138 ± .0005 in)

0.64 mm (.025 in) larger than original size ... 130.526 ± 0.013 mm (5.1388 ± .0005 in)

(10) Projection of dowels (four) out of the front and rear faces of the block ... 19.0 ± 0.5 mm (.75 ± .02 in)

(11) Width of slot for bearing cap ... 215.900 ± 0.013 mm (8.5000 ± .0005 in)

Width of bearing cap ... 215.900 ± 0.013 mm (8.5000 ± .0005 in)

Clearance between slot and bearing cap (with main bearing caps torqued) 0.025 mm (.0010 in) tight to 0.025 mm (.0010 in) loose

(12) Torque for the eight bolts that hold the piston cooling tubes ... 25 ± 7 N·m (18 ± 5 lb ft)

(13) Torque for the bolts that hold the caps for the main bearings:

Install the main bearing caps with the marks (arrow) toward the front of the engine. Install each cap in the same place from where it was removed. The cap with number 1 on its bottom goes in the front of the block. All other caps also have numbers for position.

a. Put 2P2506 Thread Lubricant on the threads of the bolts.

b. Tighten the bolts on left (tab) side to ... 260 ± 14 N·m (190 ± 10 lb ft)

c. Tighten the bolts on right side to ... 260 ± 14 N·m (190 ± 10 lb ft)

d. Put a mark on each bolt and cap.

e. Tighten the bolts on right side, from the mark ... 120 degrees

f. Tighten the bolts on left side, from the mark ... 120 degrees

(14) Dimension (new) from the centerline of crankshaft bearing bore to top of block (top deck) ... 419.10 ± 0.15 mm (16.00 ± .006 in)

(15) Dimension (new) from centerline of crankshaft bearing bore to bottom of block (pan rails) ... 165.10 ± 0.10 mm (6.500 ± .004 in)


Right Side of Engine

(16) Put 9S3263 Thread Lock on two plugs located at front and rear of right cylinder bank before installing.

(17) Put 9S3265 Retaining Compound on plug before installing.

NOTE: Put 9S3263 Thread Lock on the threads of 19 plugs installed without a seal.

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