Thermostat; Raw Water Intake Strainer - Westerbeke 5.5 EGCD Operator's Manual

COOLING SYSTEM
. THERMOSTAT
A thermostat, located near the manifold at the front of the
engine, controls the coolant temperature as the coolant
continuously flows through the closed cooling circuit When
the engine is first started, the closed thermostat prevents
coolant from flowing (some coolant is by-passed (hrough a
hole in the thennostat to prevent the exhaust manifold from
overheating). As the engine warms up, the thermostat
gradually opens. The thermostat is accessible and can be
checked, cleaned, or replaced easily. Carry a spare thermostat
and gasket
Replacing the Thermostat
Remove the cap screws and disassemble the thermostat
housing as shown. When installing the new thermostat and
gasket, apply a thin coat of sealant on both sides of the
gasket before pressing it into place. D6'
not
over-tighten the
cap screws.
Run the engine and check for normal temperatures and that
there are no leaks at the thermostat housing. ·
. . . AIR BLEED PETCOCK _
FOR PUSHING AIR FROM THE .
. COOLING SYSTEM
RAW WATER INTAKE STRAINER
NOTE:
Always install the strainer at or below the waterline so
the strainer will always be self-priming.
A
clean raw water intake strainer is a
vital
component of the
engine's cooling system. Include a visual inspection of this
strainer when making your periodic engine check. The water
in the glass should be clear.
Perform the following maintenance after every 100 hours of
operation:
1. Close the raw water seacock.
2. Remove and clean the strainer filter.
3. Clean the glass.
4. Replace the washer if necessary.
5. Reassemble and install the strainer.
6. Open the seacock. ·
7. Run the engine and check for leaks.
NOTE:
Also follow
the
above procedure after having run hard
aground.
If the engine temperature gauge ever shows a higher than
normal reading, the cause may be that silt, leaves or grass
may have been caught up in the strainer, slowing the flow of
raw water through the cooling system .
GASKET
USE HI-TACK SEALANT
S~INER
--or,.,....
THERMOSTAT
ASSEMBLY
SENDOR
FILTER
16
· TYPICAL RAW WATER STRAINER
(OWNER.lNSTALLED)
INCOMING
RAW WATER
SEACOCK.
INSPECT AND
CLEAN EVERY
toO HOURS