[Vwdiesel] Fw: Cooling system flushing

[Tad]

Just found this:
https://wiki.bentleypublishers.com/display/tech/Volkswagen+-+2001+Maintenance+Schedules

<https://wiki.bentleypublishers.com/display/tech/Volkswagen+-+2001+Maintenance+Schedules>Nice
of Bentley to publish the maintenance schedule that VW won't!

The only mention of the cooling system is to "check level".

On Tue, Nov 16, 2010 at 1:18 PM, Tad <tadc at europa.com> wrote:

> Cite?
>
> Of course the ever-helpful VW website has stopped providing maintenance
> schedule information, but as I recall the last time I looked, coolant change
> was not mentioned at all (other than the "lifetime" reference).
>
> A web search mostly finds recommendations to change the coolant from sites
> that want to sell you new coolant.
>
> Also, how would one change the coolant without first flushing the old
> coolant?  Or do you mean just drain-and-fill, which would leave much of the
> old coolant in place?
>
>
> On Mon, Nov 15, 2010 at 11:45 PM, Arkady Mirvis <arkadymirvis at gmail.com>wrote:
>
>> Accoirding to manufacturer's instructions coolant must be changed every 2
>> years. During this period the engine metal is protected by the coolant
>> additives. Regular coolant change will prevent corrosion and when drained
>> will take with it impurities. Flushing never will be needed.
>> My german mentor Andreas Hagedorn Maximilian Gerold ( inspector at MB )
>> who
>> does engines rebuild and is an excellent tuner, did show me aluminum
>> engine
>> heads with no corrosion visible in engines over 10 years old. All to good
>> maintenance.
>> ----- Original Message -----
>> From: "Tad" <tadc at europa.com>
>> To: "Rudy" <petersenrudy at hotmail.com>
>> Cc: <vwdiesel at vwfans.com>
>> Sent: Monday, November 15, 2010 10:32 PM
>> Subject: Re: [Vwdiesel] Cooling system flushing
>>
>>
>> > 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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>