ENGINE MECHANICAL (M13 ENGINE) 6A2-89
Specification of new standard crankshaft main bearing
size
5) Using scale (1) on gaging plastic (2), check bearing clear-
ance 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 rea-
son, 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
• If necessary, regrind crankshaft journal and select undersize
bearing to use with it as follows.
1) Regrind journal to the following finished diameter.
Finished diameter
44.732 – 44.750 mm (1.7611 – 1.7618 in.)
Number stamped on crank web
No.2 (Journal diameter)
123
Alphabet
stamped on
cylinder block
(Cap bore dia.)
A (1) Pink Purple Brown
B (2) Purple Brown Green
C (3) Brown Green Black
New standard bearing to be
installed.
Color painted Bearing thickness
Red and Pink 2.115 – 2.119 mm (0.08327 – 0.08342 in.)
Red and Purple 2.118 – 2.122 mm (0.08339 – 0.08354 in.)
Red and Brown 2.121 – 2.125 mm (0.08351 – 0.08366 in.)
Red and Green 2.124 – 2.128 mm (0.08363 – 0.08377 in.)
Red and Black 2.127 – 2.131 mm (0.08374 – 0.08389 in.)
1. Paint
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