Remove the piston and connecting rod assemblies. (See Piston And Connecting Rod Removal And Installation on Page 70-90-1.)
Mark and remove the inside screws (Item 1) first, then remove the outside screws (Item 2) [Figure 70-90-16].
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 70-90-16].
Remove the two gaskets (Item 4) and oil seal (Item 5) [Figure 70-90-16] from the cover.
Installation: Install the gaskets (Item 1) & (Item 2) [Figure 70-90-17] as shown.
Install the bearing case cover (Item 1) [Figure 70-90-18] with the casting mark (Item 2) [Figure 70-90-18] in the upward position. Tighten the bolts to 17 – 20 ft.-lb. (23,5 – 27,5 N•m) torque.
Before removing the crankshaft/main bearings, check the end play. Install a dial indicator. Move the crankshaft [Figure 70-90-19] 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 70-90-19].
Remove the main bearing case bolt (Item 1) [Figure 70-90-20].
Installation: Align the bearing case hole (Item 2) [Figure 70-90-20] with the hole in the block. Put oil on the bolt threads and tighten to 51 – 54 ft.-lb. (69 – 73 N•m) torque.
Remove the crankshaft/main bearing assembly from the engine block [Figure 70-90-21].
NOTE: Turn the crankshaft as needed to allow the crank pin journals to pass through the cut out (Item 1) [Figure 70-90-21] of the engine block.
Mark the bearing case halves for correct installation.
Remove the two bearing case bolts [Figure 70-90-22].
Remove the bearing case and bearing.
Installation: Tighten the bearing case bolts to 34 – 38 ft.- lb. (46 – 51 N•m) torque.
Installation: When installing the main bearing case assemblies, face the mark FLYWHEEL to the flywheel side of the engine block [Figure 70-90-23]. The thrust washers oil grooves must face outward.