It's best to install the crank gear before installing the crank in the engine. We used a 12-inch length of 21/2-inch-diameter thick-wall aluminum tube tool and a hammer. Insert the main bearing shells in the crank saddles and gently drop the crank in place with a small amount of engine assembly lube on the bearings. With the thrust bearing in place, install the rear main cap. Lightly tap the crank rearward and then forward with a rubber mallet to align the thrust surfaces. Now tighten the rear main cap bolts to roughly 10 ft-lb.