ENGINE
6LPA Service Manual
5-63
Cylinder Block
12/05
© 2007 Yanmar Marine International
Cylinder Block Assembly
• Clean all parts before assembly.
• Apply new engine oil to all sliding and rotating
surfaces before beginning assembly.
• Replace all gaskets, O-rings and oil seals.
1. Install the oil nozzle and check valve for piston
cooling. See Oil Nozzle Installation on
page 8-17.
Note: A oil groove and hole are provided to the
upper main bearing, which are not
provided to the lower main bearing.
2. Align the main bearing claws with the grooves
in the cylinder block and press in seven upper
bearings (Figure 5-141).
3. Align the main bearing claws with the grooves
in the main bearing caps and press in seven
lower bearings.
Figure 5-141
Figure 5-141
4. Place the crankshaft on the cylinder block
(Figure 5-142).
Figure 5-142
Figure 5-142
5. Push the crankshaft towards the front or rear of
the cylinder block and install four thrust
bearings to journal No. 4 of the cylinder block
with the oil grooves facing outwards
(Figure 5-143).
Figure 5-143
Figure 5-143
1 – No. 1
2 – No. 2
3 – Turn in direction of arrow.
6. Completely remove the packing material.
Note: Avoid contaminating the contact surfaces
of the main bearing cap and cylinder
block with oil.
7. Clean all components and remove all foreign
matter.
8. Clean the sealing surface using clean solvent.
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