VW Coolant

[gatesj at mailblocks.com (John Gates)]

The red G-12 is silicate free, but the G-11 aka G-48 most definitely 
has silicates, it is one of the most abundant corrosion inhibitors in 
that preparation.  The silicate is what precipitates out in the G-11 
after a while, leaving the gooey mess at some of the connections, and 
this is one of the reasons why they went to G-12.

There is nothing wrong even with phosphates if you don't use hard 
water, hard water makes phosphates precipitate out and cause all sorts 
of problems.

Note that the G-12 bottle says "phosphate and silicate free" since it's 
a true OAT technology coolant (unlike Dex-Cool which is a hybrid OAT), 
and the G-48 says only "phosphate free".

Just nitpicking here.

John Gates
--
'85 Scirocco
'97 Jetta GLX

-----Original Message-----
From: David Utley <fahrvegnugen@cox.net>
To: John Gates <gatesj@mailblocks.com>; tyrone27@gmail.com
Cc: scirocco-l@scirocco.org; glxtasy@hotmail.com
Sent: Wed, 15 Jun 2005 12:20:21 -0400
Subject: Re: Re: VW Coolant


>
> From: John Gates <gatesj@mailblocks.com>
> Date: 2005/06/15 Wed AM 11:38:45 EDT
> To: tyrone27@gmail.com
> CC: scirocco-l@scirocco.org,  glxtasy@hotmail.com
> Subject: Re: VW Coolant

> Sounds like another opiton.  I think that like VW blue, Toyota red is
> not that much different from green except it has high borates and low
> silicates or something.


I am told that VWs need coolant that is phosphate and silicate free...

David

'83 GTI, Daily Driver...
'87 16V, parts car
'82 pickup, 2.0 16V, collecting dust...