[Vwdiesel] Cooling system flushing

[Tony and Lillie]

That's exactly what I was going to say. I'll add that I've done this quite a 
bit on the Dex-Cool equiped cars to rid the system of all the old coolant, 
then flush well with water (I like to do four cycles with water, but I'm a 
bit of a perfectionist) then put the new coolant in. As mentioned, acid 
builds up, and therefore I don't like going longer than 2-3 years max 
between flushes. But, YMMV,

Tony
----- Original Message ----- 
Subject: Re: [Vwdiesel] Cooling system flushing


> Citric acid, and some liquid dish soap if it's grease you're trying to
> remove.
> Citric acid is a cooking thing, the sour stuff on sour gummy bears and 
> such.
> It's available, but you usually have to look. It is too mild to eat 
> aluminum
> such as heater cores, but removes magnesium and calcium carbonates just
> fine.  I have a big jug of it that was intended to lower the ph of water 
> for
> crop spraying, so I'm set for  long while.  The Mercedes crowd uses it, I
> think benz sold it as a factory rad flush under a fancy name for big 
> bucks,
> but it's cheap if you just buy the chemical not the branded product.
> Btw, when you're done, a bit of washing soda in the water isn't a bad idea
> either.
> -james