Suitable coolant / Corrosion inhibitor.

[Rob Beale]

pH means Hydrogen Index. It is a German language term, like ABS!

The pH scale measures the acidity or alkalinity of a substance on a scale from 1 to 14
pH 1-2 is extremely strong Acid, pH7 is neutral and pH13-14 is extremely strong Alkali
Examples of the 3 are stomach acid, distilled water and Caustic soda.

Note that rain water is slightly acidic due to dissolved CO2 from the atmosphere about pH5.5

Coke is about pH3.5 which works like other acidic rust converters.

Baking soda is weak alkaline, and is good for neutralising acid spills on car batteries and terminals.


My reading of the quotes from Lynn is that we want stronger alkaline pH levels in our engines

Cheers
Rob

long retired science teacher!

[Lang]

You need to remember with Glycol (and many other additives) the cooling efficiency is greatly reduced over plain water and the increased boiling point is required. There is a considerable difference in temperature in an engine running additives and one running plain water under the same conditions.

Modern engines like a bit more heat to run efficiently but the old ones like their 180 degrees. So we now have high pressure radiator caps and high boiling point additives including the anti-corrosion ones necessary in alloy engines particularly.

Lang