[C320-list] Coolant Colour & Demineralised Water

[Millers]

Yes

Sent from my iPhone

On Sep 26, 2013, at 4:16 AM, "Stephen Cox" <scox at timmin.com> wrote:

>> When my exhaust mixer elbow was cleaned out a couple of days 
>> ago, the mechanic also changed the coolant. 
>> 
>> My two questions are:-
>> 
>> 1. Does it matter that the coolant he drained out was red and 
>> the coolant he's replaced it with it green.  The label on the 
>> bottle was "Zerex G-05 Formula Anti Freeze Anti-boil coolant 
>> concentration requires dilution" 
>> 
>> 2. I noticed after he'd topped up the coolant with tap water 
>> from the galley sink, that the bottle said you should use 
>> demineralised water.
>> 
>> When I asked him, he said there's no difference between the 
>> colours (although my googling seems to indicate that red 
>> lasts longer?) and he said using tap or distilled water makes 
>> no difference (although my googling suggests that tap water 
>> causes corrosion).
> 
> Annie,
> 
> My reading on the internet indicates that Yanmar recommends the red/orange
> over the green as there have been side issues with the green to do with the
> silicates it contains.  The coolant your mechanic has put in is "low
> silicate" whereas Yanmar recommend no silicate content. See
> http://www.scyr.org/stellablue/Yanmar_Coolant.pdf for the advisory and
> http://www.caltex.com.au/FPL%20PDS/Extended%20Life%20Coolant.pdf for the
> details of the first of the recommended coolants in Australia.  One can't
> help thinking the mechanic doesn't bother to read the Yanmar Advisories or
> else considers himself to be more knowledgeable than Yanmar.
> 
> The two differing types should not be mixed which means when changing to a
> different type you need to completely flush the system including the hot
> water heater hoses and tubes.  This should be done with distilled water
> rather than tap water.  Having said that, Sydney water is pretty good so may
> not be the issue it could be in some areas.
> 
> If you are looking for an easy, cost effective source of distilled water,
> Woolworths carry Moore's Distilled Water in 6 litre containers for around
> $5.  You will find it in the drinks/juice section.  This is the preferred
> steam distilled rather than the arguably problematic demineralised water you
> so often find in most places.
> 
> Stephen Cox
> Tegwen #1141
>