49
L510001-05
ENGINE MAINTENANCE - 11
CLEANING SEA-WATER SECTION OF HEAT
EXCHANGER - FRESH-WATER COOLED
MODELS ONLY
The sea-water section of the heat exchanger should
be cleaned whenever there is a noticeable decrease in
cooling effi ciency. You may use the following procedure
for cleaning, or, if the build-up of scale and mineral
deposits is heavy, it is recommended that the heat
exchanger be removed and taken to a repair facility to be
boiled out (such as a radiator repair facility).
1. Remove the bolts securing the heat exchanger
end plates. Remove the end plates and gaskets.
2. Clean the water passages in the heat exchanger
by inserting a suitable-size wire brush into each
passage. Use compressed air to blow out loose
particles.
3. Clean the gasket surfaces on the end plates and
the heat exchanger. Apply PerfectSeal to both
sides of the new gaskets. Install the end plates
and the new gaskets onto the heat exchanger.
Install the bolts and tighten securely.
4. Start the engine and inspect for leaks.
Figure 11-12 Heat Exchanger and End Plate Removal
(Typical)
HEAT
EXCHANGER
THERMOSTAT
HOUSING
COOLANT
DRAIN PLUG
RAW WATER
DRAIN PLUG
GASKET
PLATE
BOLT
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