Westerbeke 6.5 MCG Service Manual page 9

ENGINE ASSEMBLY
GENERAL INFORMATION
• Be careful not to mix bolts and nuts. Metric and S.A.E.
bolts are used on various engine assemblies.
• During assembly, recheck clearances and insure that parts
are being assembled in their proper order and facing in the
correct direction in relation to the engine block, such as,
pistons, piston rings, bearings and bearing caps.
• Apply lubricating oil to moving parts during assembly.
Insure that moving parts, when assembled on the engine,
rotate or slide and are not subject to binding or
excessive tension.
• If there are mating marks scribed during disassembly,
reference them correctly for assembly.
• Use new gaskets, lockwashers, 0-rings, packings and seals.
• Tighten the bolts and nuts on important parts of the engine
to specified torques using a reliable torque wrench.
• When required, use liquid sealants when required on nuts,
bolts and gaskets. Refrain from using tape sealants.
• Most gaskets and many bolt washers are asymmetrical,
make certain they are positioned properly.
Torquing Hardware
Prevent mechanical damage by running fasteners dowri in
three steps-1/2, 2/3, and 111 torque. Exceptions are torque-to-
yield bolts and rocker arm shaft fasteners. The former are
torqued as indicated. The latter-rocker shaft fasteners-should be
brought down in very small increments, working from the
center bolts out. Gaskets, especially head gaskets, might be
damaged during assembly, they should be positioned with great
care. See TORQUE SPECIFICATIONS
thru
out this manual.
Sealants and Lubricants
Oil based PERMA'IEX
#2
and its HIGH TACK equivalent are
excellent all purpose sealers. They are effective in just about
any joint in contact with coolant, raw water, oil, or fuel. A light
coating of oil or LIQUID TEFLON can be used on rubber
gaskets and o-rings.
LOCTITE hydraulic red sealant should be used on oil adapter
hoses and the oil filter assembly.
Coat both surfaces of the oil pan gasket with high temp RED
SILICONE SEALER.
When installing gaskets that seal around water (coolant)
passages, coat both sides with WHITE SILICONE GREASE.
Do not use sealant when installing a new gasket.
HIGH-COPPER ADHESIVE SPRAYS are useful for hold-
ing a gasket in position during assembly.
Specialized gasket sealers such as HYLOMAR work well in
applications requiring non-hardening properties.
HYLO~
is particularly effective on copper cylinder-head gaskets and
resists fuel, oil , and water.
NOTE:
TAPE SEALANTS should be used on pipe plugs and
fitting that connect water coolant passages.
Bolts and Fasteners
Lightly oil head bolts and other fasteners as you assemble
them. Bolts and other plugs that penetrate the water jacket
should be sealed with PERMATEX #2 or HIGH TACK.
When assembling the flywheel, coat the bolt threads with
LOCTI1E blue.
LITIIIUM based grease is waterproof, ideal for water pump
bearings and stuffing boxes.
Antiseize compounds and thread locking adhesives such as
LOCTI'IE protect threaded components yet allow them to
come apart when necessary. LOCKTI'IE offers levels of
locking according to the job.
Heavily oil all sliding and reciprocating components, always
use clean engine oil.
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