Quote:
Originally Posted by SD1too
Richard,
I'd say that unless you have evidence of contamination, don't bother using a flushing product, just drain and renew the antifreeze solution. Using distilled/de-ionised water rather than tap water will stop scale forming. You can pick up 5 litres for about the price of a bottle of lager in a pub.
Simon
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However, if you are changing from the original specified (pink) OAT based coolant to something less (anecdotally) harmful, like blue or green silicate based, or other formula, then you should definitely flush it, as any mixing of different types causes gel-like precipitates to form.