never have experienced that.
maybe it's because I had a small amount of water soluble
oil...machinist's cutting oil ( not all version of that stuff are water
soluble I recently found out ) . ..
this as a water pump lube and anti-corrosion additive.  25 yrs and
hundreds of vehicles successfully treated this way.

'It's all about stopping, treating, and preventing corrosion' ..
particularly in cooling system and electrical connections.

On 7/4/2014 11:03 AM, Jeff Schwaia wrote:
> Be careful with Water Wetter.  It will leave a residue after a while.
>
> Google "Water Wetter Brown" or "Water Wetter Slime"
>
> Cheers,
>
> Jeff
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of SDF ( aka ;jim lahey' - Scott )
> Sent: Friday, July 04, 2014 12:21 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Coolant question
>
> that is adddressed clearly right on the side of a bottle of Water Wetter..
> they site a dino test ,
> using plain water,
> plain water with water wetter,
> 50/50 a-frz mix,
> and that mix with water wetter.
>
> water with water wetter cools best..
> they also mention that an anti-frz misture of less than 50/50 ( less a-frz ) cools better than 50/50.
>
> it works too.
>
> had this happen ..
> 85 Adventurewagon , 2.1 waterboxer engine stock 1.9 cooling system ..
> but I added the 2.1 type oil cooler..
> and water wetter..
> went on a 1,500 or so mile trip ..
> my temp needle was glued dead in the middle of the temp gauge scale ..
> hills or speed didn't make the needle budge.
> On 7/3/2014 2:05 PM, Don Hanson wrote:
>> Water Wetter does work.  I used it in my racer, also and when the
>> cooling system is maxxed out, it raises the Max a significant amount.
>>      Vanagons usually don't have an over heating problem...unless
>> something isn't quite right...In that situation, Water Wetter might be worthwhile,
>> but normally they seem to cool just fine without it.   Can't hurt, I
>> guess...but at the track you aren't running glycol
>> antifreeze/coolant...usually just water is required...so water wetter
>> has a real purpose...it helps plain water exchange heat better...in an
>> antifreeze mix, probably not so much..
>>
>>
>> On Thu, Jul 3, 2014 at 4:48 PM, Michael Magnani
>> <mfmagnani@sbcglobal.net>
>> wrote:
>>
>>> I followed with interest the illuminating thread regarding vanagon
>>> cooling systems and I'd like to pose one more question. Has anyone
>>> used Redline Water Wetter in their WBX? We use it in the Sprint Car I
>>> crew on, as do all the other racers in the pits. Granted, we're
>>> running a 700 HP, 360 cu in Chevy V8 that runs on alcohol, but the
>>> concept is the same: improving the efficiency of the cooling system. Any thoughts or opinions?
>>> Mike M
>>>
>>> Sent from my iPad