[s-cars] The great coolant debate...

[Kirby Smith]

Oh please.  The color is not indicative of the phosphate level.  I
haven't seen any coolant container (in the USA) for more than a decade,
maybe 2 decades, even in the "auto-junk" stores, that doesn't say
phosphate free.  My mechanic, Tim McLean at Northern European
Automotive, uses the Audi stuff native to my 90qs, which is greenish. 
He found the Audi pinkish stuff that came with my S6 to cause a higher
rate of corrosion.  Scientific study?  No, but you can be sure I'm not
panicking because of the color of my coolant, because the older Audi
stuff was also phosphate free.  Too many cars with aluminum heads and
other parts have been built since the 1975 Rabbit for the coolant
manufacturers to not jump on the bandwagon of phosphate free.  (Note
that IIRC, the 1975 Rabbit cam with greenish phosphate free coolant.)

However, I will entertain input of specific brands currently available
for sale that contain phosphates so I can avoid them.

kirby


James Bowes wrote:
> 
> Just a side note, in my experience all the phosphate-free coolants have been
> blue or pink from Audi, and orangey for the GM and DexCool and its ilk..
> green is usually associated with the bad, icky, aluminum-eating stuff.
> 
> moral is that not all green coolants are created equal
> 
> >
> >Stick with what was original in your car... good old fashioned green stuff.
> >As long as it's properly flushed every 2 years, you'll never have a coolant
> >related failure due entirely to lousy coolant. G12 is good stuff, but as
> >was
> >pointed out, is relatively unavailable 'on the road'. Dex Cool is JUNK.
> >Avoid the stuff. It's cooling capacity is lower than that of G12 and green
> >common coolant. Also, the anti-corrosive properties are less than stellar.
> >I've spoken to a good deal of people in the radiator business about this
> >subject and all of them agree dexcool is the worst out of all 3 options.
> >Most importantly, if you decide to switch coolants, flush flush flush!
> >Mixing of any of these three coolants will cause a nasty reaction that will
> >counter any anti-corrosive properties and perhaps even negate the
> >lubricating qualities therefore wearing out your water pump prematurely. a
> >50/50 mix of green coolant with a few glugs of watter wetter is my choice.
> >
> >Rolf Mair
> >
> >02 allroad (wifes)
> >94 UrS4
> >90 90 20vt quattro (on stands)
> >
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> 
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