Toyota Workshop Service and Repair Manuals

NOTE:  If using a standard bearing, replace with one having the same number. If the number of the bearing cannot be determined, select the
correct bearing by adding together the numbers imprinted on the cylinder block and crankshaft, then selecting the bearing with the same number as
the total. There are 5 sizes of standard bearings, marked "1", "2", "3", "4", and "5" accordingly.

Reference: 

Standard sized bearing center wall thickness:
No. 1:

Mark "1" ...............................................................................................................................................  1.991 - 1.994 mm (0.0784 - 0.0785 inch)
Mark "2" ...............................................................................................................................................  1.994 - 1.997 mm (0.0785 - 0.0786 inch)
Mark "3" ...............................................................................................................................................  1.997 - 2.000 mm (0.0786 - 0.0787 inch)
Mark "4" ...............................................................................................................................................  2.000 - 2.003 mm (0.0787 - 0.0789 inch)
Mark "5" ...............................................................................................................................................  2.003 - 2.006 mm (0.0789 - 0.0790 inch)

Others:

Mark "1" ...............................................................................................................................................  1.989 - 1.992 mm (0.0783 - 0.0784 inch)
Mark "2" ...............................................................................................................................................  1.992 - 1.995 mm (0.0784 - 0.0785 inch)
Mark "3" ...............................................................................................................................................  1.995 - 1.998 mm (0.0785 - 0.0787 inch)
Mark "4" ...............................................................................................................................................  1.998 - 2.001 mm (0.0787 - 0.0788 inch)
Mark "5" ...............................................................................................................................................  2.001 - 2.004 mm (0.0788 - 0.0789 inch)

Cylinder block Main journal bore diameter:

Mark "1" ..........................................................................................................................................  68.010 - 68.016 mm (2.6776 - 2.6778 inch) 
Mark "2" ..........................................................................................................................................  68.016 - 68.022 mm (2.6778 - 2.6780 inch) 
Mark "3" ..........................................................................................................................................  68.022 - 68.028 mm (2.6780 - 2.6783 inch) 

Crankshaft main journal diameter:

Mark "O" ..........................................................................................................................................  63.996 - 64.000 mm (2.5195 - 2.5197 inch) 
Mark "1" ..........................................................................................................................................  63.990 - 63.996 mm (2.5193 - 2.5195 inch) 
Mark "2" ..........................................................................................................................................  63.985 - 63.990 mm (2.5191 - 2.5193 inch)