By reading the post below:
citrus flush causes all this hard white chalk in my cooling system?

-it seems that the Citric Acid Flush (caf) is more dangerous than necessary for engnes with unknown maintenance histories due to potential leaks and failures.
"...it is like putting acid in your engine", - it is putting acid in your enigne.

What are the REAL benefits of this flush (besides at proper intervals) - how much can cooling capacity really change? I doubt many are racing these cars.

once a system is well burped, how can corrosion be aggravated?

Can frequent successive flushes replace an immediate sequence of harsh flushes?

ps-- I have a car w/ unknown history which has probably been drained for over year and now has green stuff in it.

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