Thread: Demineralised or distilled for radiator

In your locality, tank or tap water should be fine - tap water will have only smallest amounts of lime dissolved in it.... AFAIK lime is the component that you do not want in it. It will be interesting to read the comments of later contributirs to this.

I doubt that you'll have any problems at all with Sydney water. I never gave that a second thought when I lived there.

BUT my core is now 12 years old with a rodding at 11 years and no blockage, using distilled/demineralised water and Nulon Longlife every 2 years.
I don't think there would be many around with that record using tap water.
For an outlay of $10 , IMHO it is worth the distilled/demineralised.

Regards Philip A

Please ONLY ever use demineralised water in cooling systems. Town water has a LOT of minerals in it that causes harm to certain inhibitors/raw materials that are put in coolant to protect your engine, which in turn will wear them down faster and start causing damage to your internal cooling components. It also causes scale build up on all internal surfaces of the cooling system, which drastically reduces the cooling efficiency. That is it in a nut shell, i am happy to go into more details if necessary.

I know this as i am an automotive coolant blender/manufacturer, and i know exactly what goes into virtually all the different coolants on the market.

Thanks for the replies guys.

Par10,
As a blender/manufacturer-what would u recommend for 200 and 300tdi.
I normally use Castrol inhibitor concentrate.

Thanks

cheers

What is the difference between de-mineralised and distilled water??

I thought that the end product was basically the same.

What is the difference between de-mineralised and distilled water??

I thought that the end product was basically the same.

I do also.
I think the end result and effects are the same.

What is the difference between demineralized water and distilled water

Regards Philip A

I would only use a coolant at 50% dilution, as turbo diesels create a lot of heat compared to petrol engines. As for the particular coolant, there is a large range that is suitable. Without going through all of them, any OAT based coolant is safe (Repco Organic LL, any Nulon OAT). There is plenty more but i'd have to go through each one individually.

If you tell me exactly what Castrol coolant you are using i could tell you if its fine to use (there is several that have corrosion inhibitor properties), as there is a few that contain Silicates, Phosphates etc, which aren't good for alloy components. I make coolant for Repco, Caltex, Fuchs, John Deere, Ford, Mack, Volvo, Calibre, etc etc, so if there is any specific ones people want to know about i am happy to talk.