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Whats an expansion tank????

Discussion in 'Tuning' started by Booth_S4, Feb 12, 2007.

  1. Booth_S4
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    Booth_S4 Riding on V8 power

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    [Feb 12, 2007]
    Pulled out the documents for my S3 the other day just to have a nosey and sort them out abit!

    Found a receipt for when the new engine was put in, it also had the revo and diverter valve fitted aswell, but noticed there was also an expansion tank on it!

    What is this and what does it do??

    thanks
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  3. Caesium
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    Caesium My BM is fixed!

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    [Feb 12, 2007]
    the only expansion tank normally associated with an engine is the coolant epansion/header tank, where you fill up with coolant.
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