Coolant IAT OAT or HOAT?

[Crom Cruach]

The forum seems to mostly agree that original prestone green in a 40/60 with distilled water is the way forward. Unfortunately I can’t get it here (they only sell the “all makes all models” which I don’t trust, or other modern car stuff).
 

I’m guessing our cars take IAT inorganic acid technology, I need to understand  what to look for without a brand name so I can just look at the make up. 
 

I can also get specialist stuff like Evans waterless coolant but a 16 litres  can is €320! (4 gallons = $356). That’s a joke. 
 

[Crom Cruach]

Prestone website recommends orange:

then goes on to say GM 1995 and newer!

I have a Haynes manual now but it tells me to look in the owner manual which I don’t have. 

[cny first gen 71]

Prestone and peak have a anti freeze-coolant they say is universal, check your local parts stores.

[Crom Cruach]

I found a product called Xstream G48, an ethylene glycol based anti-freeze and coolant with silicate based inhibitors. Does this sound correct?

[Dtret]

I think I would stay away from the 95 and up gm orange. All makes all models should be just fine. Make sure you flush it really good to make sure you get the crud out. 

[cny first gen 71]

Summit Racing has a blog on Facebook called "on all cylinders " they have a pretty good write up about this subject. Not sure how to share it.

[stangeba]

I remember a GM recall on my 2002 Pontiac where I think they changed the coolant. Didn't GM have some fancy new coolant "Dex Cool" that turned out bad? That was many years ago.

[Dtret]

25 minutes ago, stangeba said:

I remember a GM recall on my 2002 Pontiac where I think they changed the coolant. Didn't GM have some fancy new coolant "Dex Cool" that turned out bad? That was many years ago.

Yep.  That’s the orange stuff. It’s not that the antifreeze was bad, it just didn’t react well to aluminum and metal combined. 

[Crom Cruach]

I have orange stuff in my radiator but I think it’s rust 😂

[Dtret]

5 minutes ago, Crom Cruach said:

I have orange stuff in my radiator but I think it’s rust 😂

I kinda thought you might. Hence the flush comment. Lol. 

[stangeba]

All this talk about coolant reminds me of this story.

 As a kid I remember my older brother empting the winter purple ? alcohol from our grandfather's 1937 Dodge P/U in the spring. 

It was kept in 1 gallon glass jugs in the garage. The cooling system was then filled with water till fall when the purple alcohol was again put back in. 

The engine did suffer a cracked head once and Grampa got it welded up.   

This 37 Dodge is still in the family. Picture from 2004 finishing the restoration.

 

[Michael Boyte]

I absolutely love the 37 Dodge pickup . 

That engine looks fantastic

[jft69z]

2 hours ago, stangeba said:

I remember a GM recall on my 2002 Pontiac where I think they changed the coolant. Didn't GM have some fancy new coolant "Dex Cool" that turned out bad? That was many years ago.

Dex-Cool is good now. There was a problem with gaskets that failed early on too, changed plenty of intake manifold sets on the GM 3.1, 3.4 engines. Not a question of 'IF' they were going to leak, but 'WHEN' it was going to.

Still, I wouldn't run it over the 5 year/100K mile mark without changing it.

[Crom Cruach]

Now that’s a whitewall tire

[Glen]

Dex Cool was my nickname in high school. 
 

Nah… it wasn’t.  I was called a lot of things, but nothin’ remotely close to “cool” 😂🤣