Thermostat - Westerbeke 8.0KW BTDAR Operator's Manual

COOLING SYSTEM
Refilling the Coolant
After replacing the engine block drain plug, close the radiator
coolant petcock. then pour clean, premixed coolant into the
radiator and when the coolant is visible, start the engine.
Monitor the coolant in the radiator and add as needed. Fill
the radiator to the filler neck and install the pressure cap.
Remove the cap on the coolant recovery tank and fill with
coolant mix to halfway between LOW and MAX and replace
the cap. Run the engine, observe the coolant expansion flow
into the recovery tank.
After checking for leaks, stop the engine and allow it to cool.
Coolant should draw back into the cooling system as the
engine cools down. Add' coolant
(0
the recovery tank if
needed. Clean up any spilled coolant.
TO GUULAN.r
1
RECOVERY
MAKE CERTAIN THESE
PASSAGES ARE KEPT
NOTE:
Periodically check the condition o!the'radiator
pressure cap. Ensure that the upper and lower rubber seals
are in good condition and check that the vacuum valve opens
and closes tightly. Carry a spare cap.
THERMOSTAT
A thermostat, located near the manifold at the front of the
engino, 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 through a
hole in the thermostat to prevent 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. Do
not
over-tighten the
cap screws.
Run the engine and check for normal temperatures and that
there are no leaks at the thermostat housing.
COOLANT
TEMPERATURE
SWITCH
THERMOSTAT
ASSEMBLY
AIR FILTER
,
BLEED
PETCOCK
SENDOR
[OPTIONALI
The air filter cartridge prevents engine room dust and dirt
from entering the engine, it also extends engine life, and
quiets the engine.
MAINTENANCE
The filter should be cleaned every 100 operating hours. Tap
the cartridge on a flat surface to dislodge loose
dirt
or clean
off with compressed air. If the cartridge is badly contaminated
or oily, replace it.
CARTRIDGE
INTAKE
SILEN.CER
~
WESTERBEKE
Engines & Generators
15