Main bearings: The bearings supporting the crankshaft. These are located in the lower portion of the engine block. Related posts: Hub Diagnostic socket Self-supporting tyre Crankshaft pulley AT8601 Automotive Engine Components Design Syllabus Heat gasket Horizontally opposed engine or Boxer engine Antifreeze Crankshaft position sensor High beam Crankshaft counter-balances Sub-frame Cylinder head Connecting rod Flywheel Crankshaft Cylinder block Crankcase Dynamic timing meter Transmission System Read more articles Previous PostMagneto Next PostManifolds