SECTION 10 - ENGINE
10-45
CONNECTING ROD
Inspection
Distortion or damage
Check the connecting rod for distortion between the
large and small ends of the connecting rod with a
connecting rod aligner. If the result exceeds the
allowable limit, replace.
Distortion –3.937, (100 mm)
Standard Value: Less than 0.003″ (0.08 mm)
Allowable Limit: 0.0078″ (0.2 mm)
Parallel –3.937, (100 mm)
Standard Value: Less than 0.0019″ (0.05 mm)
Allowable Limit: 0.0059″ (0.15 mm)
1. Gauge
2. Piston pin
3. Distortion
4. Flat surface of the aligner
5. Pin
Clearance between the small end bushing and
the piston pin
Measure the inside diameter of the connecting rod
small end bushing.
If the clearance exceeds the allowable limit, replace.
Standard Clearance: 0.0004″ - 0.001″ (0.010
mm - 0.025 mm)
Allowable Limit: 0.003″ (0.08 mm)
Play between the connecting rod and the
crankshaft
Assemble the connecting rod to the crankshaft and
measure the play in shaft direction. If the play is more
than the allowable limit, replace the connecting rod.
Standard Play: 0.0039″ - 0.0118″ (0.1 mm - 0.3
mm)
Allowable Limit: 0.0275″ (0.7 mm)
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