Thread: coolant type

Why would LR run red OAT and not green OAT like in the V8 or not the cheaper glycol.

I would expect that the reason is a long term reason - such as breaking down of parts through corrosion, cavitation or similar over a longer period of time.

I replaced my green coolant with a flush and back to red OAT. IF you're putting new stuff in then there is no real reason to not use the proper stuff.

Originally Posted by Slunnie

Why would LR run red OAT and not green OAT like in the V8 or not the cheaper glycol.

I would expect that the reason is a long term reason - such as breaking down of parts through corrosion, cavitation or similar over a longer period of time.

I replaced my green coolant with a flush and back to red OAT. IF you're putting new stuff in then there is no real reason to not use the proper stuff.

All well and good so long as you are prepared to fix all the leaks that result from the change. This can be an expensive and difficult exercise. Keeping the green stuff in delays the job until you are ready for it, during a major overhaul.

Originally Posted by bee utey

All well and good so long as you are prepared to fix all the leaks that result from the change. This can be an expensive and difficult exercise. Keeping the green stuff in delays the job until you are ready for it, during a major overhaul.

Mine sealed themselves up over a couple of weeks including a beauty from the fuel cooler. There is now one drip still remaining which was there with the green coolant. Its better than having to overhaul everything under the bonnet at all.

I changed mine to green about 5 years ago as I was concerned about the then relative unavailability of red coolant in remote areas and the potential need to add coolant if a hose broke or similar. I asked my LR specialist mechanic who said that there's no problem using high quality green in lieu of the red. There are huge numbers of vehicles with aluminium parts, which use green coolant with no apparent problems.
Mundy

Coopers in sydney use green and mine has had it for 12 years, all good so far!

Originally Posted by Slunnie

Mine sealed themselves up over a couple of weeks including a beauty from the fuel cooler. There is now one drip still remaining which was there with the green coolant. Its better than having to overhaul everything under the bonnet at all.

I changed mine from green to Nulon RED OAT about 4 months ago. I did the swap at the same time as changing most of the cooling system hoses.

After the change over the front seal of the fuel cooler started leaking, but I suspect this had more to do with the cooler hoses being moved will changing the hoses around the thermostat than anything specifically related to the OAT.

I did get a leak around the hose at the outlet of the water pump that didn't fix itself, and required the aluminium flange at the outlet to be scoured back to a clean shiny finish before the leak sealed.

The other thing that became an issue was a leak from behind the water pump mounting bracket. There is a o-ring that deteriorates over time and you start to get coolant stains on the side of the sump. It's easy to ignore with the green coolant, not so easy when there is a neon red stain on the side of the sump.

cheers
Paul

If i had a dollar for every time i got asked this same question, I would be driving a later model Disco!
The colour of the coolant has nothing to do with it. Its only a dye. If there were no colour in the coolant, you can't see it in the header tank. A dark color is easier to see in a white plastic tank.It has better contrast.
From memory, OAT stands for Organic Acid Technology or some such and has more to do with protecting silicone seals and orings.
I sell 4 different coolants at my work. All are different colours. All to some degree do the same job. I use Fleetguard PG Platinum (Propylene Glycol) in my D2 and its an OAT coolant. It happens to be a purple colour. It would make no difference if it were green or red or yellow etc...

Here is a short vid on it from my mate Kev at Fleetguard HQ in Melbourne.

[ame="http://www.youtube.com/watch?v=_d8x2piUzB4"]Are all coolants created equal? - YouTube[/ame]

Why do we stock them all? Simple. If you go and spend $250k+ on a new truck, use a non same branded coolant, and have a cooling issue while under warranty, they can blame it on the coolant and wash there hands of you. A simple sample test will tell them what brand you were using. The same goes for oils to a degree. They all have signatures.
Just like an insurance company, if you dont declare extra's or mod's, they can take their bat and ball and more importantly your money and walk away.

Im not telling you to drop what you have and convert.
It's just my 2 cents worth.
Cheers
R2

Then why does LandRover use a different coolant in the TD5 compared to the V8? They are both OAT.