Monaco Camelot 2007, Owner'S Manual

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Section 10 — cHaSSiS information
camelot 2007
Coolant Types:
Cummins- BTE SCA.
Texaco 50/50 with bit 2qts SCA
(factory).
INFORMATION
Refer to OEM manual for detailed
antifreeze information.
Charge Air Cooler
The diesel engine uses compression to ignite
the fuel/air charge. To increase compression
inside the combustion chamber (resulting in
increased power output) a turbocharger is added
to the engine. The turbocharger is a paired
housing assembly with impellers inside each
housing connected by a common shaft. One
impeller is propelled by the engine exhaust,
which drives the other impeller. The function
of the other impeller is to increase compression
inside the combustion chamber by forcing air
into the intake manifold.
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This process works well, however, the intake
air charge is heated two different ways: through
convection by the exhaust gases driving the
turbocharger and when air is compressed. This
negative effect inside the combustion chamber
results in lost power potential. Therefore, a
Charge Air Cooler (CAC) is installed to cool
the intake air before it enters the engine. The
CAC performs the same function as a radiator,
cooling air instead of liquid. Ambient air passing
through the CAC will cool the engine intake air
charge.
After leaving the turbocharger, intake air
is compressed and heated to approximately
300º to 375º F., depending on the engine load
and throttle position. Before air enters the
intake manifold, the CAC cools the intake
air temperature to the engine manufacturer
specifications. Lowered intake air temperatures
reduce exhaust emissions, improve fuel
economy and increase horsepower. The CAC
will continually expand and contract up to ¼” as
throttle increases and decreases.
Cleaning and Maintenance:
Regular maintenance includes draining
the engine coolant, flushing/cleaning
the cooling system, inspecting the
water pump standpipe, replacing
the thermostat, gasket and seal, and
replacing the coolant and SCA element.
Inspect the charge air cooler every six
months and remove dirt and debris that
may block the fins. If the motorhome
develops an oil leak, there is a possibility
that the oil will coat the fins of the CAC.
Dust will adhere to the oil film, clog the
fins and reduce cooling efficiency. When
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the oil leak is repaired, the CAC must be
thoroughly cleaned.
During each oil change
inspect
the
engine side of the radiator/CAC
assembly for foreign objects that may
cause restriction.
Spraying degreaser on the charge air
cooler, as well as using a steam cleaner,
will not damage the CAC. However ,
pressure washer and steam cleaner
nozzles placed too close to the CAC
can bend the fins
. The recommended
cleaning procedure for the CAC and the
radiator is to use a bucket of mild soap
and water. Carefully wash with a bristle
brush then rinse using a garden hose,
with minimum water pressure, standing
back a distance to avoid bending the fins.
When performing maintenance, it is also
necessary to inspect other components of
the cooling system. The charge air cooler
and radiator also requires an inspection
for cracks, broken welds, secure
mounting, and general cleanliness.
Coolant Hoses:
Rotten, swollen and worn hoses, as well as
loose connections, are frequent causes of coolant
system problems. Overheating can be caused
by a collapsed hose or a clog caused by rubber
shedding from a rotten hose. Replace any hose
found to be cracked, swollen or damaged.
Connections should be inspected periodically
and hose clamps tightened.
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