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b. Grade number of each crankshaft main journal is punched on c. Select main bearing with suitable thickness according to the How to select main bearings Crankshaft Cylinder block main journal grade number 0 1 2 3 0 0 (A, Black) 1 (B, Red) 2 (C, Green) 3 (D, Yellow) 1 1 (B, Red) 2 (C, Green) 3 (D, Yellow) 4 (E, Blue) 2 2 (C, Green) 3 (D, Yellow) 4 (E, Blue) 5 (F, Pink) 3 3 (D, Yellow) 4 (E, Blue) 5 (F, Pink) 6 (G, White) For example: Main journal grade number: 1 = 3 (D, Yellow) Connecting rod bearing (Big end) 1. Install connecting rod bearing to connecting rod and cap. 2. Install connecting rod cap to connecting rod. Tighten bolts to the specified torque. Measure inner diameter “C” of each bearing. 4. Measure outer diameter “Dp” of each crankshaft pin journal. 5. Calculate connecting rod bearing clearance. Standard: 0.020 - 0.045 mm (0.0008 - 0.0018 in) Limit: 0.065 mm (0.0026 in) 6. If it exceeds the limit, replace bearing. 7. If clearance cannot be adjusted within the standard of any SEM013D Type I Main journal grade number No. 5 No. 4 No. 1 Crankshaft SEM203D Type II Main journal grade number No. 1 No. 5 journal Crankshaft AEM027 Inside micrometer AEM028 CYLINDER BLOCK SR20DE Inspection (Cont’d) EM-115 |