[Vwdiesel] Cooling system flushing

[Tad]

I've never heard of using anything but plain water for the job.  Considering
that the "stuff" you want to flush is likely corrosion products of
iron/aluminum, I wouldn't expect a grease cutter to do much good... but I
guess a detergent would help to suspend the particles so the water can flush
them out, but I'd be concerned about the residue interacting with the new
coolant... but  then what do I know?

On that subject (and sorry if this is a thread hijack), but I often wonder
about the "lifetime" coolant (G12) in my 01 TDI.  Just how long is a
"lifetime" anyway?  I know that some portion of the coolant (and therefore
additives) have been renewed when for example my T-belt was changed, but my
car has never had it's coolant fully flushed/exchanged in it's lifetime.
 I've heard some people recommend 100k, but I doubt that's based on any
real-world evidence.

I just did a bit of googling on the subject and found one guy saying that
the main concern is buildup of acid in the coolant, and all you need to do
is test the PH and adjust (with BG Cooling System Conditioner according to
him).

On Mon, Nov 15, 2010 at 1:43 PM, Rudy <petersenrudy at hotmail.com> wrote:

> Anyone have any Tricks or ideas on what is the best detergent for the job?
> Think it would be ok to use a heavy duty, mix with water, Grease cutter?
>
> Rudy
>
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