G3500 Engines Caterpillar

Installation Procedure

1. Measure the clearances of the main bearings. Refer to Disassembly and Assembly, "Bearing Clearance - Check".
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   NOTICE
   Ensure that the upper halves and the lower halves of the main bearings are installed with the tabs fitting into the notch in the cylinder block and the notch in the main bearing cap.

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   Illustration 1	g00930606

2. Coat the main bearings with clean engine oil. Install new lower main bearing (4) into main bearing cap (2).

3. Install the new upper main bearing with the side without the tab into the side of the block with the tab. Use your hand and roll the upper main bearing into position. Use Tooling (A) and rotate the crankshaft. Rotate the crankshaft until the oil hole is positioned in front of the side of the upper main bearing with the tab.

4. Install Tooling (C) and finish rolling the upper main bearing into position. Make sure that Tooling (C) does not slide under the upper main bearing.

5. Remove Tooling (C).
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   Illustration 2	g00930593

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   Illustration 3	g00930745

6. Tighten nuts (3) on Tooling (D) to raise main bearing cap (2) to the block. Nuts (3) must be tightened evenly in order for main bearing cap (2) to fit into the block.

7. Coat the threads of the bolts for the main bearing caps and coat the underside of the bolt heads with clean engine oil. Install the two inner bolts for the main bearing cap. Remove Tooling (D) and install the two outer bolts for the main bearing cap.
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   Illustration 4	g00930580

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   Illustration 5	g01001689

   Note: Install main bearing caps with the part number and FRONT toward the front of the block. Each cap has a number. Each cap must be installed in the same position as the correct number on the side of the cylinder block pan rail.

8. Tighten the bolts in the letter sequence to the following torque. Use Tooling (E) and Tooling (B) to tighten bolts to a torque of 190 ± 14 N·m (140 ± 10 lb ft).

9. Tighten the bolts in the letter sequence to the following torque. Tighten the bolts for an additional 180 ± 5 degrees (1/2 turn).
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   Illustration 6	g00930577

10. Install covers (1) onto the side of the engine.

Note: Refer to the Specifications Module for more information on the crankshaft.

End By:

1. Install the piston cooling jets.

2. Install the oil pump.