ENGINE
5-42
6LPA Service Manual
Cylinder Block
© 2007 Yanmar Marine International
Preparation for Disassembly
1. Remove the flywheel.
2. Install the engine on an engine stand.
3. Remove the timing belt and pulley. See Timing
Belt Removal on page 5-69.
4. Remove the cylinder head. See Cylinder Head
Removal on page 5-16.
5. Remove the freshwater pump and seawater
pump See Freshwater Pump Removal on
page 7-5 and See Seawater Pump
Disassembly on page 7-8.
6. Remove the alternator.
7. Remove the timing gear. See Timing Gear
Removal on page 5-80.
8. Remove the fuel injection pump. See Fuel
Injection Pump Removal on page 6-29.
9. Remove the oil pan and timing gear case. See
Oil Pump Removal on page 8-7.
10. Remove the oil cooler. See Oil Cooler Removal
on page 8-14.
11. Remove the engine mount.
Cylinder Block Disassembly
1. Remove the 6 rear oil seal case bolts.
2. Insert a screwdriver between the oil seal case
and main bearing cap and pry
(Figure 5-79, (1)) to remove the oil seal case.
Figure 5-79
Figure 5-79
3. To check the connecting rod thrust clearance,
move the connecting as shown in Figure 5-80
to measure the thrust clearance using a dial
gauge.
• Standard thrust clearance: 0.100 to 0.200 mm
(0.004 to 0.008 in.)
• Maximum thrust clearance: 0.30 mm
(0.011 in.)
If the thrust clearance measured exceeds the
maximum specification, replace the connecting
rod assembly and inspect and replace the
crankshaft if needed.
Figure 5-80
Figure 5-80
(1)
0005109
0005110