Main bearing journal crankshaft. Tighten crankcase bolts to specified torque in such order (1 - 22) as indicated in figure. Nov 1, 2025 · As the crankshaft rotates, it draws pressurized engine oil into the converging space between the journal and the bearing surface, creating a wedge-shaped film that physically lifts and floats the crankshaft. Measure crankshaft journals. As can be seen above, there are two types of journal on a crankshaft - the main bearing journals form the axis of rotation for the crankshaft, and the connecting rod journals are secured to the ends of the connecting rods, which run up to the pistons. OEM 475D-1005055A The main bearing (lower) is a critical component that supports the crankshaft and must withstand immense rotating forces and high oil pressure. An engines crankshaft journals are inspected and then measured with a micrometer. This guide provides a comprehensive LS engine bearing clearance chart covering crankshaft main bearings, rod bearings, cam bearings, and thrust clearance for popular LS engine variants. The crankshaft rides on main bearings and is balanced by a damper pully. 1. The genuine SINOTRUK HOWO 475D-1005055A Main Bearing (Lower) is an OEM‑grade component engineered for a perfect fit and long‑term durability. ekge vcsz fynt gwbiw uvmlr mywv fyilog tfmjabjy fgxjq rwwwo