53
Thermostats
The engines have two piston thermostats with wax-filled
activators. When the engine is cold, the thermostats
keep the heat exchanger circuit completely closed. The
coolant is then fed directly back to the engine through a
by-pass line. After the engine has warmed up, the vol-
ume of the wax increases and the thermostats gradually
increase the flow to the heat exchanger circuit, while
closing the by-pass line.
Seawater pump
The seawater pump is fitted to the timing gear cover at
the front of the engine. his pump is driven via the timing
gears.
The TAMD162C and TAMD163A can be equipped with
a centrifugal type seawater pump. This pump has an
impeller of bronze.
Impeller replacement and other repair or service
work on this type of pump must be carried out at an
authorized workshop.
The TAMD163P is equipped with a rubber impeller sea-
water pump. This type of pump is also used on the
TAMD162C and TAMD163A.
Note : The impeller may be damaged if the pump is run
dry.
Charge air cooler (CAC)
The charge air cooler (CAC) is supplied with seawater
directly from the seawater pump through the lower line
connection on the front edge of the CAC.
The CAC insert is divided into two sections; the lower
intake section and the upper outlet section. Overflow
between the sections occurs in the rear edge of the
CAC.
Heat exchanger
The seawater passes on through the charge air cooler
(CAC) outlet to the heat exchanger. The engine coolant
is cooled in the heat exchanger in the freshwater circuit
so the engine maintains a correct operating tempera-
ture. The heat exchanger insert consists of a number of
cooling pipes which the seawater flows through. Intake
and outlet are located in the heat exchanger end sec-
tion on the starboard side. The heat exchanger is divid-
ed up into three sections; intake, flow and outlet sec-
tions. Overflow between the sections occurs in the
endsection cover on the port side.
NOTE! In tropical waters and in water where there is
excessive algae growth the charge air cooler and the
heat exchanger can rapidly become clogged. This can
result in the engine running hot. Inspect and clean the
charge air cooler and heat exchanger regularly.
Seawater pump, rubber impeller type
Seawater pump, centrifugal type
Summary of Contents for TAMD162C
Page 1: ...INSTRUCTIONBOOK TAMD162C TAMD163A TAMD163P ...
Page 2: ......
Page 82: ...80 Notes ...
Page 83: ......
Page 84: ...7737387 6 English 8 1998 ...