ENGINE 3-33
CONROD
CONROD SMALL END I.D.
Measure the conrod small end inside diameter using the small
bore gauge.
If the conrod small end inside diameter exceeds the service
limit, replace the conrod with a new one.
& 09900-20605: Dial calipers
% Conrod small end I.D.
Service Limit: 20.040 mm (0.7890 in)
CONROD DEFLECTION AND BIG END SIDE CLEARANCE
Wear on the big end of the conrod can be estimated by checking
the movement of the small end of the rod. This method can also
be used to check the extent of wear on the parts of the conrod’s
big end.
& 09900-20701: Magnetic stand
09900-20606: Dial gauge (1/100 mm)
09900-21304: V-block set (100 mm)
% Conrod deflection
Service Limit: 3.0 mm (0.12 in)
Push the big end of the conrod to one side and measure the
side clearance using a thickness gauge. If the clearance
exceeds the service limit, replace the crankshaft assembly with
a new one or bring the deflection and the side clearance within
the service limit by replacing the worn parts (conrod, big end
bearing, crank pin, etc.) with new ones.
& 09900-20803: Thickness gauge
% Big end side clearance
Service Limit: 1.0 mm (0.04 in)
CRANKSHAFT
CRANKSHAFT RUNOUT
Support the crankshaft using V-blocks and measure the crank-
shaft runout using the dial gauge, as shown. If the runout
exceeds the service limit, replace the crankshaft with a new one.
& 09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09910-21304: V-block set (100 mm)
% Crankshaft runout
Service Limit: 0.08 mm (0.003 in)
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