1D-66 Engine Mechanical:
4) From number stamped on crank web No.2 and alphabets stamped on cylinder block, determine new standard
bearing to be installed to journal, by referring to the table shown.
For example, if number stamped on crank web No.2 is "1" and alphabet stamped on cylinder block is "B", install a
new standard bearing painted in "Brown" to its journal.
New standard size crankshaft main bearing specification
Alphabet stamped on cylinder
block (Cap bore dia.)
5) Using scale (1) on gauging plastic (2), check bearing clearance with newly selected standard bearing.
If clearance still exceeds its limit, use next thicker bearing and recheck clearance.
6) When replacing crankshaft or cylinder block due to any reason, select new standard bearings to be installed by
referring to number stamped on new crankshaft or alphabets stamped on new cylinder block.
Undersize bearing (0.25 mm (0.0098 in.))
• 0.25 mm (0.0098 in.) undersize bearing is available, in five kinds varying in thickness.
To distinguish them, each bearing is painted in the following colors at such position as indicated in figure.
Each color represents the following thickness at the center of bearing.
Undersize of crankshaft main bearing thickness
Red and Purple
Red and Brown
Red and Green
Red and Black
A or 1
B or 2
C or 3
2.117 – 2.121 mm (0.08335 – 0.08350 in.)
2.120 – 2.124 mm (0.08347 – 0.08362 in.)
2.123 – 2.127 mm (0.08359 – 0.08374 in.)
2.126 – 2.130 mm (0.08371 – 0.08385 in.)
2.129 – 2.133 mm (0.08382 – 0.08397 in.)
Number stamped on crank web No.2 (Journal diameter)
New standard bearing to be installed