Assembling The Engine And Components; Precautions Before Assembling The Engine; Installing The Tappets - Yanmar 6LY3 series Service Manual

Assembling the Engine and Components

12/05
ASSEMBLING THE ENGINE AND
COMPONENTS
Precautions Before Assembling the
Engine
• Thoroughly clean and inspect all parts to be
assembled.
• Coat sliding and rotating parts with new engine oil
when assembling.
• Replace all gaskets and O-rings.
• Use the proper sealing material as needed to
prevent oil / water leaks.
• Check the oil and thrust clearances of parts when
assembling.
• Make sure to use the correct hardware and
fasteners.
• Torque the main bolts and nuts to the specified
torque value. Avoid over-tightening the aluminum
alloy part retaining bolts.
• Align the index marks (if any) when assembling.
Make sure the correct part sets are used for
bearings, pistons and other assemblies where
required.
Clean all parts with an approved cleaning solvent,
diesel fuel or inspect all engine parts and compare
with stated wear limits. NOTICE: If dirt, shavings
and other debris are allowed to remain in the
engine, seizure, premature wear, intermittent
failures and poor engine performance may result.
Completely clean each oil hole. After cleaning,
check that no scaling remains anywhere on the
cylinder block (Figure 5-79, (1)). Place wooden
blocks on the floor and set the cylinder block upside
down (with the cylinder head mounting surface
facing down). Keep the positioning pins clear of the
wooden blocks.
6LY3 Service Manual
Figure 5-79
1 – Cylinder Block

Installing the Tappets

Check that each tappet (Figure 5-80, (1)) is
installed in the appropriate cylinder and valve
(exhaust or intake). Apply a coat of engine oil to
each tappet before installation. After fitting, check
that each tappet operates freely and smoothly.
Figure 5-80
(2)
1 – Tappet
2 – Cylinder Block
© 2007 Yanmar Marine International
ENGINE
(1)
0005779
Figure 5-79
0005780
Figure 5-80
(1)
5-55