- 46 - TECHNICAL INFORMATION Condition Causes Remedies 7) Oil Consumption Excessive (1) Oil level elevated (2) Oil level lowered (3) Oil leak • Clearance between cylinder liner & piston • Wear of piston ring, ring groove • Piston ring’s damage, stick, wear • Piston ring opening’s disposition improper • Piston skirt part damaged or abnormal wear • Oil ring’s oil return hole clogged Replace Replace piston, piston ring Replace piston ring Correct position Replace piston Replace piston ring • Looseness of valve stem & guide • Wear of valve stem seal • Cylinder head gasket’s leak Replace in set Replace seal Replace gasket • Looseness of connection parts • Various parts’ packing poor • Oil seal poor Replace gasket, repair Replace packing Replace oil seal