Originally Posted By: Garak
That could still happen today, with too weak of a mixture, I suppose, if corrosion gets out of hand.
unless you let the coolant concentration runs so weak that the acid buffer becomes ineffective in dealing with the non-ferrous metals in the engine innards to turn acidic, the likeliness of this is still relatively now, IMO.
afterall: unless you are a DIY (or some indy shops with old silicate green or prestone all-in-one) and is servicing an otherwise factory-filled automobile that is less than 10 yrs old (and contaminated/diluted the coolant), otherwise: I don't see the coolant can go weak over time while still within servicable timeframe. Of course, one might argue that the buffers, additives that prohibits corrosion will deplete over time, but fact is, (1)it takes such a long time for that to happen; and (2)most P-OAT or similar sold in pre-diluted gallon jugs (concentration is assured), so unless someone did a flush, drain and then fill and mess up with the concentration of the coolant, otherwise, my take is that it's still not very likely.
Lastly: have you notice that ABS plastic on these hybrid plastic+metal radiator lasts considerably longer while running these OAT-based coolant? I do!
Q.