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What to use to clean my expansion tank


Nifty

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Maybe a dumb question: if the crud is that persistent and would not leave the expansion tank anyway why remove at all? Is it a technical issue or rather an aesthetical one? My overflow tank is black and I guess I don't want to know what is going on inside *wink*

 

Gert

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Gert,

 

It was more of a heavy sludge (like Swarfega) and I fear that overtime it will progress its way into the engine water lines (it probably has - will flush engine out once put back into car). And if I add a different coolant to this "sludge" it may cause further sludge build up and eventually block the system!!

 

Keep off the straight and narrow *tongue* 😬

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