green coolant

[rangietragic]

Have recently had work done on my td5 130 by two different land rover specialists,and both times it has come back with green coolant,not red.Is there a green coolant suitable for a td5?

[djam1]

The use of green coolant cost me about 7K I was up for a head, radiator, oil cooler.
That said I understand you should use OAT coolant and I presume you can buy green OAT so the green coolant red coolant thing may not be as valid as people suggest.
I am pretty sure Justin uses green coolant in TD5s and he looks after more TD5s than anyone else here.
Maybe my experience was because of poor servicing with the green coolant.

[Disco Muppet]

As long as it's OAT and they fully flushed the system before hand it should be fine.
If you're not happy with it, drain it, flush it, and put red back in.
I always use red but that's just me.

[snowbound]

There are different coolants? I have green stuff in my 84 V8 3.5 is that OK?? You got me worried now!

[rangietragic]

Fine in a v8;)

[TasD90]

I have always had green coolant in my td5 when it has been serviced by Justin C.
If he chooses it then that's good enough for me.
Cheers Peter .

[robbotd5]

Red OAT from new, red OAT (nulon) last coolant change (every 12 months) using demineralized water. No problems.
Regards
Robbo

[snowbound]

Fine in a v8;)
Thank you!

[PAT303]

I hate OAT,I only use Glycol Green . Pat

[BilboBoggles]

I think the issue with OAT vs Glycol is not so much which type, but how well they are flushed out if you choose to change. From what I understand a TD5 particularly tends to retain a couple of liters of coolant and is difficult to fully flush. If you mix glycol and oat coolant then the two will react together and turn the guts of your engine into a black paste.

There are probably arguments each way glycol vs OAT, but the most important thing is to never mix the two. (And on a TD5 you have to be very careful with flushing if you choose to change... Easier to just stick with OAT...)
Oat can be green as well as red, which makes it even harder to know for sure, until your engine is rooted. So least risk is to put red into red.

[goingbush]

From what I read about mixing coolant types you would be better off running river water in your cooling system.

[gromit]

I did some research on coolants for Series land Rovers.
http://www.aulro.com/afvb/series-land-rovers/154742-coolants-older-engines.html
There is OAT, HOAT and good old ethylene glycol (IAT or CAT)

The colour only tells you what dye they use, not the formulation.
Early OAT coolants caused a lot of problems for older engines so they now have a 'type 2' OAT which overcomes the problems (allegedly).


Major advantage of OAT/HOAT seems to be the extended life. But as stated, if changing from OAT/HOAT to IAT then a good flush is the best recommendation.


Colin

[rick130]

I did some research on coolants for Series land Rovers.
http://www.aulro.com/afvb/series-land-rovers/154742-coolants-older-engines.html
There is OAT, HOAT and good old ethylene glycol (IAT or CAT)

The colour only tells you what dye they use, not the formulation.
Early OAT coolants caused a lot of problems for older engines so they now have a 'type 2' OAT which overcomes the problems (allegedly).


Major advantage of OAT/HOAT seems to be the extended life. But as stated, if changing from OAT/HOAT to IAT then a good flush is the best recommendation.


Colin

OAT and HOAT's are still 96+% ethylene or propylene glycol, it's the anti-corrosion package that's different ;)

The OAT Land Rover used (Texaco) was the first of it's type and used a compound known as 2EHA which unfortunately acts as a softener on some elastomer's used as seals which creates leaks.
It also capillaries out a lot more easily than a conventional silicate based coolant and it doesn't appear to like air in the system at all.

OAT's have much better heat transfer than silicate based coolants, but everything has to be absolutely schmick in the cooling system or you'll create headaches for yourself.

I've had good luck with it in a few vehicles but JC and Pat have much wider experience and subsequently hate it with a vengeance, and FWIW I've gone to a HOAT (Cummins-Fleetguard) to minimise any potential problems ;)

[gromit]

OAT and HOAT's are still 96+% ethylene or propylene glycol, it's the anti-corrosion package that's different ;)



Thanks,

Should have remembered that from the research...... but it was a while ago.
It was interesting the different info given out by the tech departments of different companies, I'm not sure that they really know the best solution......


Colin

[PAT303]

OAT and HOAT's are still 96+% ethylene or propylene glycol, it's the anti-corrosion package that's different ;)

The OAT Land Rover used (Texaco) was the first of it's type and used a compound known as 2EHA which unfortunately acts as a softener on some elastomer's used as seals which creates leaks.
It also capillaries out a lot more easily than a conventional silicate based coolant and it doesn't appear to like air in the system at all.

OAT's have much better heat transfer than silicate based coolants, but everything has to be absolutely schmick in the cooling system or you'll create headaches for yourself.

I've had good luck with it in a few vehicles but JC and Pat have much wider experience and subsequently hate it with a vengeance, and FWIW I've gone to a HOAT (Cummins-Fleetguard) to minimise any potential problems ;)

Rick,had overheating issue's with a Cummins powered Genset last swing,pulled the thermostat and it was corroded as was the housing running CAT red OAT.I'm well into double figures now as far as how many times I've seen that. Pat

[rick130]

And the CAT OAT is the same as Land Rover OAT with a small addition of...bugger, can't recall, but it's almost identical, they are both made by Texaco :(

Interesting Cummins have made the wholesale change to a propylene glycol HOAT, sounds like they've had problems too.