> In fact, as a result of this experience I will probably flush
> the system every two years.
Until the last 10 years or so, that was recommended by most car makers. The
additives in the classic 'green' antifreeze get consumed over time (whether
the car is driven or not), and it's best to flush the system when changing
coolant, so that all the old, degraded stuff gets flushed out. The TR3
owner's manual says to change the antifreeze every year.
The various "long life" coolant (antifreeze) formulas available today do
last longer, but should still be flushed and changed periodically. And
there has been enough said about the hazards of switching (in particular
with installing Dex-Cool into an engine that has previously used "green
stuff"), that I'm going to stick with green.
-- Randall
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