Push the crankshaft toward the rear of the engine to install the rear thrust bearing, and to the front of the engine to install the front thrust bearing.
Install the upper thrust bearings in the number four main bearing saddle.
To avoid the possibility of damage to the cylinder block and main bearing cap, the number four main bearing cap must be aligned with the dowel pins in the bearing saddle when the capscrews are tightened.
The main bearing caps are numbered one through seven from front to rear in the cylinder block. The caps must be installed so the number on the cap matches the bearing saddle in the block. The lock tangs in the main bearing saddle and bearing cap must be on the same side.
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