Thread: Glycol % in coolant

Without googling, I think it needs to be within that percentage as an optimum for things like cavitation protections etc. As I understand it, the Glycol also isn't as good at heat transfer so it will also reduce the radiators efficiency.

More glycol less cooling,as slunnie said it doesn't transter heat,water wetter fix's it though. Pat

Im online with whats above,

it makes the coolant "thicker" so it doesnt flow quite so well and the glycol coats the engine bits, more glycol means a thicker layer on the hot spots reducing flow over that exact spot.

it also acts as an antifreeze so a thicker mix might be the ticket for the winter months in the mountains.

Originally Posted by PAT303

water wetter fix's it though. Pat

trick is finding it in woop woop where i am

AFAIK Land Rover recommend 50% in a 3.9 and that is what I have always used.
I have never had overheating issues and NO visible corrosion which is more important IMHO.
My core is now 9 years old with no problems using Nulon Longlife at 50% every two years.
Regards Philip A

Glycol mixed with water is an anti-freeze/anti-boil.
By increasing the % in water you reduce the freeze point and increase the boiling point but, as the fella's above point out, you reduce the overall heat transfer of the coolant but wait, there's more, by running at 50% you are running the optimum amount of corrosion inhibitors that are included with the glycol solution.
Glycol by itself will not prevent corrosion, it'd probably accelerate it in some instances, so corrosion inhibitors are blended into the package.

Run a a lower % and you effectively reduce the corrosion protection.
Most data sheets suggest not running below 33% or thereabouts, and Land Rover say 50% and it's purely for corrosion control.

Originally Posted by Sprint

trick is finding it in woop woop where i am

Do you want me to send you a bottle.Every one sells it in Kal as it's the only way to stop cruisers and patrols from running hot. Pat

seems i may have spoke a lil too soon, rummaging through my box'o'goodies earlier i found a bottle of a brew called Mo'Cool, a product made by Motul, and upon doing a lil research, is apparently as good as Redline Water Wetter...... reason i didnt know what it was is because i got given it by a motul rep last summer after i mentioned noticing a few temp spikes when i was giving my XR8 a fair hiding, he just said to chuck it in the next time i did a coolant change, didnt say what it was though!