July 2005 / MOBILE WHISPER 3,5 / EN 9
When the radiator is flat mounted on the roof, the
expansion tanks should be mounted a little higher.
(refer to figure 11 detail B).
Figure 11. Low profile radiator assembly on the roof
3 ENGINE RADIATOR SYSTEM
The oil cooling system of the Whisper 3,5 is ventilated in
the engine itself and no expansion tank is applied. To
prevent the oil in the radiator - when mounted higher than
the engine - to flow to the engine after stopping the engine
(overflow the engine), a pressure valve has to be fitted
(refer to figure 8).
Figure 12. Pressure valve in the return line to prevent the
engine to overflow as a result of siphoning. Only when
radiator higher than engine.
When it is not possible to drain the oil from the radiator
every time the oil is changed, one should pump out the
engine oil as good as possible from the engine sump and
increase the oil change intervals to every 50 running
hours.
It is very important to use good quality heat
resistant hose and fittings. Therefore it is
strongly advised to use Mastervolt
installation kits.
4 HOW AND WHERE TO MOUNT THE RADIATORS
The radiator kit includes rubber mountings to prevent
vibrations to be transferred to the body of the vehicle (fig.
18). Due to the difference between vehicles general
instructions are not available. One has to find out where
the best place for mounting is. For OEM customers
Mastervolt can supply a special customised installation
kit.
Figure 13. Radiator on rubber mountings
When bottom mounted the radiator should not be the
lowest point of the vehicle to avoid damage.
A free flow of air should be guaranteed. When horizontal
mounted the fan should be on top, that causes a flow of
air downwards. Often it is possible to find a place where
extra space above the fan helps to create a free flow of
air. It is recommended to make a shield below the
radiator to catch stones and dirt and operates as a
spoiler. The distance between the radiator and the shield
should be at least 50 mm. Sometimes it is possible to
build the radiators and shield on a sub frame that is
mounted below the vehicle as a module.
Measures has to be taken to prevent the
hot air circulating and reducing the
capacity of the radiators.
Refer to figure 14.
Figure 14. Bottom mounted with shield
INSTALLATION
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