Remove the piston and connecting rod assemblies. (See Piston And Connecting Rod Removal And Installation on Page 60-90-1.)
Mark and remove the inside screws (Item 1) first, then remove the outside screws (Item 2) [Figure 60-90-16].
NOTE: The inside bolts are different length than the outside bolts.
Install two screws in the bearing case cover and remove the cover (Item 3) [Figure 60-90-16].
Remove the two gaskets (Item 4) and oil seal (Item 5) [Figure 60-90-16] from the cover.
Installation: Install the gaskets (Item 1) and (Item 2) [Figure 60-90-17] as shown.
Install the bearing case cover (Item 1) with the casting mark (Item 2) [Figure 60-90-18] in the upward position.
Tighten the bolts to 24 – 27 Nโขm (18 – 20 ft-lb) torque.
Before removing the crankshaft / main bearings, check the end play. Install a dial indicator. Move the crankshaft [Figure 60-90-19] to the flywheel side, zero the dial indicator. Measure the end play by pulling the crankshaft toward the gear case side.
If the measurement exceeds the allowable limit, replace the thrust washers [Figure 60-90-19].
Remove the main bearing bolt (Item 1) [Figure 60-90-20].
Turn the crankshaft so the crank pin of the #3 cylinder is at BDC. Start to remove the crankshaft until the crankpin of the #2 cylinder is in the #3 cylinder bore. Rotate the crankshaft 120ยฐ counter clockwise so the #2 crank pin is at BDC. Repeat the above procedure when the #1 crank pin is in the #3 cylinder.
Installation: Align the bearing case hole with the hole in the block (Item 2) [Figure 60-90-20]. Put oil on the bolt threads and tighten to 69 – 74 Nโขm (51 – 54 ft-lb) torque.
Remove the crankshaft / main bearing assembly from the engine block [Figure 60-90-21].
NOTE: Turn the crankshaft as needed to allow the crank pin journals to pass through the cut out (Item 1) [Figure 60-90-21] of the engine block.
Mark the bearing case halves for correct installation.
Remove the two bearing case bolts [Figure 60-90-22].
Remove the bearing case and bearing.
Installation: Tighten the bearing case bolts to 46 – 51 Nโขm (34 – 38 ft-lb) torque.
Installation: When installing the main bearing case assemblies, face the mark FLYWHEEL to the flywheel side of the engine block [Figure 60-90-23]. The thrust washers oil grooves must face outward.
