Westerbeke 65A-FOUR - Assembly Procedures; Surface Preparation; Gasket Information

ASSEMBLY PROCEDURES
GENERAl INFORMATION
Surface Preparation
Thoroughly remove all substances deposited on the gasket
application
surfaces using a gasket scraper or wire brush.
Check to ensure that the surfaces to which the silicone gasket
is to be applied is flat. Make sure that there are no oils,
greases and foreign substances deposited on the application
surfaces. Do not forget to remove the old sealant that
remains in the bolt holes.
ASSEMBLY
• Wash all parts, except for oil seals, O-rings, rubber sheets,
etc. with cleaning solvent and dry them with air pressure.
• Always use tools that are in good condition and be sure
you understand how to use them before performing any
job.
• Use only good quality lubricants. Be sure to apply a coat
of oil, grease or sealant to parts as specified.
• Be sure to use a torque wrench to tighten parts for which
torques are specified.
• When the engine is assembled, new gaskets and O-rings
must be installed.
Be aware of these common problems that can occur during
assembly.
Insufticlent Lubrication. Heavily oil sliding and
reciprocating parts, lightly oil head bolts and other fasteners,
except those that penetrate into the water jacket. These
fasteners should be sealed with Pennatex No. Z or the
high-tech equivalent.
Reversed
orientation. Most gaskets, many bolt washers, and
all thermostats are asymmetrical.
Mechanical damage. Run fasteners down in approved
torque sequences and in three steps-I/Z, 2/3, and 111 torque.
Exceptions are torque-to-yield bolts and rocker arm shaft
fasteners. The former are torqued as indicated. The
latter-mcker shaft fasteners should be brought down in very
small increments, working from the center bolts out. Gaskets,
especially head gaskets, might also be damaged during
assembly, they should be positioned with great care.
GREASE
INTERNAL SNAP RING. EXTERNAL SNAP RING
PLACE THE SHARP EDGE
AGAINST THE DIRECTION
aFFORCE
When reassembling external or internal snap rings, position
them so that the sharp edge faces against the direction from
which force is applied.
GASKET INFORMATION
The engine has several areas where form-in-place RTV
silicone gaskets are used such as LOCTITE 598 or GE
RTV 100. To ensure that the gasket fully serves its purpose,
it is necessary to observe some precaution when applying the
gasket. Bead size, continuity and location are very important.
Too thin a bead could cause leaks and too thick a bead could
be squeezed out of location causing blocking or narrowing of
the fluid feed lines. To eliminate the possibility of leaks from
a joint, it is necessary to apply the gasket evenly without a
break while observing
the correct bead size.
The gasket material used in the engine is a room temperature
vulcanization
(RTV) type and is supplied in a 140z (400
gram) applicator/tube. The RTV hardens as it reacts with the
moisture in the atmospheric air and can be used for sealing
both engine oil and coolant assemblies.
Engines & Generators
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