Inspecting Piston Rings; Inspecting Crankshaft - TOHATSU TLDI 40 Service Manual

Inspecting Piston Rings

q Piston ring
w Ring gauge
e Thickness gauge
• Piston ring end gap
Ring Standard value
0.22 to 0.37 mm
Top
(0.009 to 0.015 in) (0.032 in) or more
0.33 to 0.48 mm
2nd, 3rd
(0.013 to 0.019 in) (0.035 in) or more
• Pressing the ring on the piston crown, place in
ring gauge.
• Use cylinder when ring gauge is not available.

Inspecting Crankshaft

q Dial gauge
w V block
• Crankshaft run-out
Standard value
Within 0.05 mm Replace when 0.05 mm
(0.002 in) (0.002 in) or more
• Connecting rod deflection
Standard value
Within 2 mm
(0.08 in)
Service limit
Replace when 0.8 mm
Replace when 0.9 mm
Service limit
Service limit
Replace when 2 mm
(0.08 in) or more
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