Engine Shutdown; Extended Engine Shutdown; Coolant System - Holiday Rambler Imperial 2008 Owner's Manual

CHASSIS INFORMATION — 10
Synthetic oils API category III specifi cations
are recommended for extreme cold temperatures
only. Low viscosity oils used for winter
operations will aid in starting. Synthetic oils,
or oil with adequate low temperature properties
used for Arctic operations where the engine
cannot be kept warm when shut down, will aid
in starting. The use of synthetic oils should not
be used to extend drain intervals. Extended oil
change intervals can decrease engine life and
possibly affect the engine warranty.
Oil additives should not be used unless
the oil supplier or oil manufacturer has been
consulted and provided positive evidence or
data establishing satisfactory performance in
the engine.
NOTE:
The engine does not require a "break-
in" procedure.
INFORMATION:
Refer to the Engine Manufacturers
Owners Manual for details on the oil
maintenance schedule.
NOTE:
The engine is filled with Texaco Ursa
Premium TDX EC SAE 15-40w (with CJ-4
rating) multi-viscosity oil from the factory.
242
Lubricating oil recommendations and specifi cations.

ENGINE SHUTDOWN

Allow the engine to idle three to fi ve minutes
after a full load operation. This allows adequate
cool down of pistons, cylinders, bearings and
turbocharger components. Under normal driving
conditions, exiting the highway is generally
lighter engine operation and the need for the
three to fi ve minutes is not necessary.

Extended Engine Shutdown

Verify that all the fl uid levels are correct
when the motorhome has been sitting for
30 days or more. Follow the normal starting
procedures. If the oil pressure gauge does not
register within 15 seconds, shut off the engine
immediately to avoid damage. Consult the
engine manufacturer's owner's manual for
guidelines on troubleshooting low oil pressure,
or contact a qualifi ed service technician. Allow
the engine to idle for fi ve minutes before
operating under a load.
2 00 8 I MP E R I A L

COOLANT SYSTEM

A fully formulated coolant is recommended to
simplify cooling system maintenance. Coolant
that is fully formulated contains balanced
amounts of antifreeze, Supplemental Coolant
Additive (SCA), buffering compounds and
clean, quality water.
Antifreeze that is not fully formulated must be
mixed with clean, quality water (distilled water
070201
preferred) in a 50/50 ratio (40 to 60% working
range). This ratio will provide protection from
-34º F. to 228º F. Antifreeze must be of low
silicate content as defi ned by ASTM D-4985.
The 50/50 ratio of antifreeze and clean quality
water plus SCA must be premixed prior to being
put in the cooling system. Placing antifreeze
and then water in the cooling system is not
recommended. Refer to the OEM engine manual
for more information.
CAUTION:
An over-concentration of antifreeze
will reduce freeze protection. Use of
high silicate antifreeze can damage the
cooling system. SCA is required in the
cooling system to inhibit cylinder liner
pitting as a result of cavitation erosion.
WARNING:
Do not continue engine operation if
engine temperature rises above 220º F.
At approximately 225º F., the Warning
light on the dash will illuminate and
the engine protection software will
begin to decrease fuel (derate) to the
engine regardless of throttle position.
Continued operation will result in
severe engine damage.