Chargecooler Fluid Info
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Chargecooler Fluid Info
Just in case you can't read German
Just in case you can't read German
Like the engine, the chargecooler has to run on a mixture of water (coolant) and glycol
(antifreeze) to stop it getting too hot in the summer and stop it from freezing in the winter.
If you just used water in the chargecooler you would soon have troubles.
As soon as the temperature goes below 0
to ice it expands which can split the metal fins inside the charge cooler or the cooling radiator.
The label on the chargecooler does explain what is required but a lot is lost in translation.
The short, easy to understand version is 50% antifreeze, 50% water.
This is good to protect the system from freezing all the way down to -37°C.
You can mix your own if you wish using normal tap water if you don't live in a hard water area.
Cheap mineral water is a good option and so is distilled water but deionised water is not recommended as it will attempt to balance inself by removing ions from rubber and metal.
The easier method is to buy premixed coolant. Ensure it is a 50:50 mix and is suitable
for aluminium. Premixed engine coolant from smart will be fine but probably over priced.
Smart have a document for engine coolant/antifreezes called Sheet 325.0
The level of the chargecooler fluid should be checked monthly for signs of fluid loss. Although
losing all the fluid won't really affect the engine all that much, running the system dry are having
an airlock in particular areas of the system could cause the motor to overheat or burn out.
The level should be kept around the bottom of the filler neck. The small air gap allows for
expansion of the fluid through trapped air but allows the system to retain a slight pressure.
If you drain and refill the system you will notice the level will fall over a week or so as you use
the car. This is because the trapped air is being forced through the system and eventually
collects in the chargecooler. Just top it up each time until the level stops dropping.
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