|
|
The upper main bearing (2) has a oil feed hole and a center groove to allow lubrication of the main journal and MAIN BEARING SELECTION CHART CRANKSHAFT DIAMETER BLOCK MAIN BORE DIAMETER BLOCK MAIN BORE GRADE REMOVAL BEARING -CRANKSHAFT MAIN surface. See Fig. 189. For verification, refer to for number to size identification. Crankshaft Main Journal Main Bearing Bore Grade Marks
1 2 3 A (3) Standard (2) +003 mm (1) +0.006 mm (+0.0002 in.) B (4) -0.003 mm (- 0.0001 in.) (3) Standard (2) +003 mm C (5) -0.006 mm (- 0.0002 in.) (4) -0.003 mm (- 0.0001 in.) (3) Standard
Crankshaft Diameter (mm) Min Max Grade 63.9870 mm 63.9956 mm A 63.9957 mm 64.0042 mm B 64.0043 mm 64.0130 mm C
Block Main Bore Diameter (mm) Min Max Grade 68.9895 mm 68.9964 mm 1 68.9965 mm 69.0034 mm 2 69.0035 mm 69.0105 mm 3 Crankshaft Journal Grade
Block Main Bore Grade
1 2 3 A Class 3 Class 2 Class 1 B Class 4 Class 3 Class 2 C Class 5 Class 4 Class 3
2007 Dodge Nitro R/T 2007 ENGINE 4.0L - Service Information - Nitro
|