Mitsubishi Heavy Industries S4S, Service Manual

Page: 106 / 220

REASSEMBLY OF BASIC ENGINE
7-4
1.8 Measuring crankshaft end play
Attach a dial gauge to the end of the crankshaft to measure
the end play.
If the end play deviates from the standard value, loosen the
main bearing cap bolts and retighten.
Make sure that the crankshaft turns freely.
Measuring crankshaft end play
1.9 Reassembling piston and connecting rod
(1)
Apply engine oil to the piston pin, and reassemble the
piston and the connecting rod by inserting the piston
pin, observing the orientation of piston and connecting
rod shown in the illustration.
Note: The pistons and piston pins are assembled to each
other in clearance fit. However, the piston pins are
more easily inserted into the pistons if the pistons are
warmed up with a heater or in hot water.
(2)
Using ring pliers, install the snap ring. Check the snap
ring for its tension, and make sure the ring fits snugly in
the groove.
Note: Install all the snap rings so that their end gap faces
toward the bottom of the piston.
Reassembling piston and connecting rod
Installing snap ring
Item Standard Limit
Crankshaft end play
0.100 to 0.264 mm
[0.0039 to 0.0104 in.]
0.300 mm
[0.0118 in.]
㧭
View A
Front mark
Weight stamp
Matching
mark with
connecting
rod cap
Snap ring pliers