11. CRANKCASE/CRANKSHAFT Downtown 300i ABS Oil Seal Remove the oil seal from the left crankcase. CRANKSHAFT INSPECTION Measure the connecting rod big end side clearance. Service Limit: 0.6 mm replace if over Measure the connecting rod small end I.D. Service Limit: 17.06 mm replace if over Measure the crankshaft bearing play. Service Limits: Axial : 0.20 mm replace if over Radial: 0.05 mm replace if over 11-4