Cleaning Sea-Water Section Of Heat Exchanger (Fresh-Water Cooled Applications Only) - Crusader 5.0L MPI Instruction Manual

ENGINE MAINTENANCE - 11
2. Close the Ball Valve on the U-Tube located on the
front, right side of engine. Remove the hose going to
water heater.
NOTE: Keep hose high or plugged to keep coolant
from leaking out.
3. Follow the Cooling System Fill Procedure previously
outlined for the Port Engine
4. The engine has now been completely fi lled with
coolant. The water heater circuit MUST also be
completely fi lled prior to connecting hoses back to
the engine.
5. Using a funnel, fi ll the heater hoses and heater
circuit completely. Make sure there are no loops or
air pockets in the hoses.
6. When the hoses and heater circuit are completely
fi lled, properly attach the hoses back to the engine.
Open both Ball Valves.
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.
50
HEAT
EXCHANGER
COOLANT
DRAIN PLUG
RAW WATER
DRAIN PLUG
Figure 11-12 Heat Exchanger and End Plate Removal
L510001-13
THERMOSTAT
HOUSING
GASKET
BOLT
PLATE
(Typical)