3-66 ENGINE
CONROD BIG END SIDE CLEARANCE
• Inspect the conrod side clearance by using a thickness
gauge.
• If the clearance exceeds the limit, remove the conrod and
inspect the conrod big end width and the crank pin width.
• If the width exceed the limit, replace conrod or crankshaft.
Conrod big end side clearance:
Service Limit: 0.30 mm (0.012 in)
09900-20803: Thickness gauge
Conrod big end width:
Standard: 19.95 – 20.00 mm (0.7854 – 0.7874 in)
09900-20205: Micrometer (0 – 25 mm)
Crank pin width:
Standard: 20.10 – 20.15 mm (0.7913 – 0.7933 in)
09900-20605: Dial calipers (1/100 mm, 10 – 34 mm)
CONROD-BIG END BEARING INSPECTION
• Inspect the bearing surfaces for any sign of fusion, pitting,
burn, or flaws. If any, replace them with a specified set of
bearings.
CONROD-BIG END BEARING SELECTION
• Place the plastigauge axially along the crank pin, avoiding the
oil hole, as shown.
09900-22301: Plastigauge
• Tighten the conrod cap bolts to the specified torque, in two
stages. (3-77)
* Apply engine oil to the bearing cap bolt.
* Never rotate the crankshaft or conrod when a piece
of plastigauge is installed.
SAMPLE
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