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interesting coolant stuff
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Pretty sure the cap says 'Use only VW brand phosphate free coolant' or something similiar.
Dan
Euroroc II <flaatr@yahoo.com> wrote:All I remember is not to use one of the glycol's, polypropylene or
polyethylene, one is safe and one is bad...
Bad is defined as it does not protect the bonding of the aluminum core to
the plastic ends on the radiator.
Been using the blue stuff (look another color) from the dealer. I think the
warning tag that most people hove lost, the one that goes around the filler
cap on the expansion tank, warns what is safe to use. I'll look at mine and
get back to you.
-RGK-
At 12:09 PM 3/24/2003 -0500, rfkellner@snet.net wrote:
>It seems like we have run the full gamut of coolant opinions. From
>straight H2O to never use the green to never use the pink/orange. Can
>anyone point to some industry papers or independent studies?
>
>Also, for someone that wants to run straight H2O aren't there plain
>additives to inhibit corrosion? If so, what is in these products?
>
>Thanks, Rick K. Soon to change water pump and coolant.....
>
>Original Message:
>-----------------
>From: ian Butler ian@bluemoon.hplx.net
>Date: Mon, 24 Mar 2003 10:03:55 -0500 (EST)
>To: tberk@mindspring.com, scirocco-l@scirocco.org
>Subject: Re: interesting coolant stuff
>
>
>On Mon, 24 Mar 2003, T Berk wrote:
>
> > It's SILICA that is abrasive in old style coolant, it rubs seal to
> > death and is prob. the main cause (right up there with stiff belts
> > drawn too tight) of weepy waterpumps.
>
> > Check the label of the orange stuff next time; silica free. Prob.
> > partly the reason the orange stuff seems to creep out around hoses and
> > cause that scabby crust as well.
>
>I believe Dex and other long-life coolants have special detergents that,
>more or less like synthetic, have a tendency to "clean things up", which can
>involve removing gunk that's keeping the system from leaking.
>
>More importantly, though, green antifreeze contains phosphates, and
>phosphates eat aluminum. It's not a big deal in inline cars like
>Sciroccos, but it's a *huge* deal in Vanagons, where coolant sits in the
>heads, seeps under the gaskets, and pits/rusts its way right through to the
>ground. Such a serious and expensive problem on those that a lot of
>prospective Vanagon buyers won't touch a bus with green coolant in it.
>
>It hasn't concerned me enough to immediately replace the green coolant in my
>'roc (not that I've had the stupid thing since November anyway.. grumble)
>but it's about due for a flush, and it'll get Dex when I fill it again.
>
> > btw- Yep, water conducts better than coolant, 70/30 water to coolant
> > seems like a good nominal minimum.
>
>I believe 70/30 is minimum and 30/70 is maximum. Supposedly if you go above
>30/70, the hot light says "Hello, too much antifreeze!" but I haven't
>checked...
>
>ian Butler / ian@bluemoon.hplx.net
>'88 Scirocco 16v, '87 Vanagon Syncro GL
>
>
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<P>Pretty sure the cap says 'Use only VW brand phosphate free coolant' or something similiar.
<P>Dan
<P> <B><I>Euroroc II <flaatr@yahoo.com></I></B> wrote:
<BLOCKQUOTE style="BORDER-LEFT: #1010ff 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">All I remember is not to use one of the glycol's, polypropylene or <BR>polyethylene, one is safe and one is bad...<BR><BR>Bad is defined as it does not protect the bonding of the aluminum core to <BR>the plastic ends on the radiator.<BR><BR>Been using the blue stuff (look another color) from the dealer. I think the <BR>warning tag that most people hove lost, the one that goes around the filler <BR>cap on the expansion tank, warns what is safe to use. I'll look at mine and <BR>get back to you.<BR><BR>-RGK-<BR><BR>At 12:09 PM 3/24/2003 -0500, rfkellner@snet.net wrote:<BR>>It seems like we have run the full gamut of coolant opinions. From<BR>>straight H2O to never use the green to never use the pink/orange. Can<BR>>anyone point to some industry papers or independent studies?<BR>><BR>>Also, for someone that wants to run straight H2O aren't there plain<BR>>additives to inhibit corrosion? If so, what is in these products?<BR>><BR>>Thanks, Rick K. Soon to change water pump and coolant.....<BR>><BR>>Original Message:<BR>>-----------------<BR>>From: ian Butler ian@bluemoon.hplx.net<BR>>Date: Mon, 24 Mar 2003 10:03:55 -0500 (EST)<BR>>To: tberk@mindspring.com, scirocco-l@scirocco.org<BR>>Subject: Re: interesting coolant stuff<BR>><BR>><BR>>On Mon, 24 Mar 2003, T Berk wrote:<BR>><BR>> > It's SILICA that is abrasive in old style coolant, it rubs seal to<BR>> > death and is prob. the main cause (right up there with stiff belts<BR>> > drawn too tight) of weepy waterpumps.<BR>><BR>> > Check the label of the orange stuff next time; silica free. Prob.<BR>> > partly the reason the orange stuff seems to creep out around hoses and<BR>> > cause that scabby crust as well.<BR>><BR>>I believe Dex and other long-life coolants have special detergents that,<BR>>more or less like synthetic, have a tendency to "clean things up", which can<BR>>involve removing gunk that's keeping the system from leaking.<BR>><BR>>More importantly, though, green antifreeze contains phosphates, and<BR>>phosphates eat aluminum. It's not a big deal in inline cars like<BR>>Sciroccos, but it's a *huge* deal in Vanagons, where coolant sits in the<BR>>heads, seeps under the gaskets, and pits/rusts its way right through to the<BR>>ground. Such a serious and expensive problem on those that a lot of<BR>>prospective Vanagon buyers won't touch a bus with green coolant in it.<BR>><BR>>It hasn't concerned me enough to immediately replace the green coolant in my<BR>>'roc (not that I've had the stupid thing since November anyway.. grumble)<BR>>but it's about due for a flush, and it'll get Dex when I fill it again.<BR>><BR>> > btw- Yep, water conducts better than coolant, 70/30 water to coolant<BR>> > seems like a good nominal minimum.<BR>><BR>>I believe 70/30 is minimum and 30/70 is maximum. Supposedly if you go above<BR>>30/70, the hot light says "Hello, too much antifreeze!" but I haven't<BR>>checked...<BR>><BR>>ian Butler / ian@bluemoon.hplx.net<BR>>'88 Scirocco 16v, '87 Vanagon Syncro GL<BR>><BR>><BR>>_______________________________________________<BR>>Scirocco-l mailing list<BR>>Scirocco-l@scirocco.org<BR>>http://neubayern.net/mailman/listinfo/scirocco-l<BR>><BR>><BR>>--------------------------------------------------------------------<BR>>mail2web - Check your email from the web at<BR>>http://mail2web.com/ .<BR>><BR>><BR>><BR>>_______________________________________________<BR>>Scirocco-l mailing list<BR>>Scirocco-l@scirocco.org<BR>>http://neubayern.net/mailman/listinfo/scirocco-l<BR><BR><BR>_______________________________________________<BR>Scirocco-l mailing list<BR>Scirocco-l@scirocco.org<BR>http://neubayern.net/mailman/listinfo/scirocco-l</BLOCKQUOTE><p><br><hr size=1>Do you Yahoo!?<br>
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