Yanmar 6LY3 series Service Manual

ENGINE
Inspecting the Cylinder Block and Components
5-42 6LY3 Service Manual
© 2007 Yanmar Marine International
Inspecting the Connecting Rod Side
Clearance
• Install the connecting rod to the crankshaft.
• Check the side clearance as shown in
Figure 5-51 and compare values with the stated
limits.
Figure 5-51
Figure 5-51
1 – Thickness Gauge
Inspecting the Crank Pin Bearings
Check for flaking, melting or seizure on the contact
surface of the crank pin bearings.
Measuring Crank Pin Oil Clearance
• Measure the crank pin outside diameter.
• Measure the crank pin bearing inside diameter.
• Calculate the oil clearance from the difference of
the measured values. (See Measuring the Crank
Pins and the Main Bearing Journals on page 5-46
for measuring the crank pin outside diameter.)
• Replace the crank pin bearing if the oil clearance
exceeds the stated limits.
• Correct the crankshaft by grinding to a uniform
undersized dimension (if available).
• Use an oversized bearing insert in the connecting
rod, if available (Figure 5-52). NOTICE: When
measuring the inside diameter of connecting rod
bearing inserts, install the bearing inserts
correctly and tighten the connecting rod cap bolts
to the standard torque.
An alternate procedure for measuring crank pin oil
clearance is to use a plastic gauge.
Connecting Rod Side Clearance
Standard Limit
0.20-0.40 mm
(0.0078-0.0157 in.)
0.45 mm
(0.0177 in.)
0005635
(1)
Rod Bolt Torque
132.1-141.9 N·m
(13.5-14.5 kgf·m)
(97.4-104.6 lb-ft)
Item Standard Limit
Rod Bearing ID
65.000-65.045 mm
(2.5590-2.5608 in.)
65.100 mm
(2.5629 in.)
Crank Pin O.D.
64.952-64.964 mm
(2.5571-2.5576 in.)
64.902 mm
(2.5551 in.)
Bearing
Thickness
1.987-2.000 mm
(0.0782-0.0787 in.)
—
Clearance
0.036-0.093 mm
(0.0014-0.0036 in.)
0.160 mm
(0.0062 in.)

Yanmar 6LY3 series Specifications

General

Brand	Yanmar
Model	6LY3 series
Category	Engine
Language	English