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Old 01-23-2020, 06:35 PM #16
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Originally Posted by mesooohoppy View Post
so whats the deal with people on the first page using green coolant? i thought that was a big no no in these types of cars?
I mentioned earlier that I believe the red/green was to differentiate antifreezes without silicates versus those that had them. I may be wrong, but my experiences support that, as silicates are abrasive. Anyway, I think that color may not matter anymore. Perhaps someone else knows for certain?
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Old 01-24-2020, 12:19 PM #17
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Originally Posted by mesooohoppy View Post
so whats the deal with people on the first page using green coolant? i thought that was a big no no in these types of cars?
You can use green in a 1999 safely. Does that mean you should?
No. Factory fill was red, and I don't think Toyota was trying to scam anyone by selling new cars with red coolant either. We have moved on to HOAT coolants that can last longer and offer better corrosion protection. Just don't mix tap water in it and say that it's fine because one website vs the rest of the internet says so.
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Old 01-24-2020, 01:05 PM #18
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Quote:
Originally Posted by thennen View Post
I mentioned earlier that I believe the red/green was to differentiate antifreezes without silicates versus those that had them. I may be wrong, but my experiences support that, as silicates are abrasive. Anyway, I think that color may not matter anymore. Perhaps someone else knows for certain?
i did some reading this AM on different types of coolant because i am not well versed in them and one thing i quickly learned that color can be a good indicator of what you are using, you really should be paying attention to the type of coolant you are using:

Inorganic
Organic
Hybrid Organic

this was a great guide:
The Ultimate Coolant Color Guide | Toyota Parts Center Blog

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Originally Posted by T4R2014 View Post
You can use green in a 1999 safely. Does that mean you should?
No. Factory fill was red, and I don't think Toyota was trying to scam anyone by selling new cars with red coolant either. We have moved on to HOAT coolants that can last longer and offer better corrosion protection. Just don't mix tap water in it and say that it's fine because one website vs the rest of the internet says so.
well does anyone know what the 99 manual says? my car didnt come with one. im assuming it says to use red toyota coolant, the link i posted above says its HOAT. im sure you can 'safely' use IAT coolant if you religiously change the coolant when you need to; but if its not the right stuff, why even bother?

it seems as if all coolant these days is already pre dilluted. so im not sure why people feel the need to put tap, distilled, or de-ionized water in their cooling system when the right, pre-dilluted, coolant is already available.

either way, happy i learned something today!
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Old 01-24-2020, 01:18 PM #19
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Originally Posted by mesooohoppy View Post

well does anyone know what the 99 manual says? my car didnt come with one. im assuming it says to use red toyota coolant, the link i posted above says its HOAT. im sure you can 'safely' use IAT coolant if you religiously change the coolant when you need to; but if its not the right stuff, why even bother?

it seems as if all coolant these days is already pre dilluted. so im not sure why people feel the need to put tap, distilled, or de-ionized water in their cooling system when the right, pre-dilluted, coolant is already available.

either way, happy i learned something today!
From the 1999 manual:

Quote:
Add only demineralized or distilled
water to fill the radiator. And if you
spill some of the coolant, be sure
to wash it off with water to prevent
it from damaging the parts or paint.
Quote:
Coolant type:
"Toyota Long Life Coolant" or equivalent
With ethylene−glycol type coolant for a
proper corrosion protection of aluminum
components
Do not use alcohol type antifreeze or
plain water alone.

A 1996 manual with only specify ethelyne glycol coolant. Factory fill was green for that year. Again, green will work. That said, better coolants are cheap enough so why use that?
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Old 01-26-2020, 11:03 PM #20
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Originally Posted by mesooohoppy View Post
so whats the deal with people on the first page using green coolant? i thought that was a big no no in these types of cars?
I worked on vehicles for 50yrs. coolant changes from one model to the other. then adding water to 100%coolant to set it up can cause problems if your tap water has nasty chemicals/metals in it.

I stopped using tap water back in 1993 ... after I changed to distilled I had no issues on the cooling system corrosion. I purchased a new 1996 GM sedan .. 1.5 yrs later my heater core got messed up. I had to flush out the whole deal.. then added the correct coolant and distilled water .. I then had no problems . I still own it .. I had to replace radiator because a side tank had a small crack .. when I replaced radiator the new radiator internals looked new on the old .. no mess no finger dirt on my finger.

on a dodge vehicle antifreeze changed used different coolant so it is tricky.. Toyota changed the coolant on model years so put the same coolant in it,, it can cause a mess..
my 2016 I have to use a very expensive toyota coolant premixed.... some use different coolants that are compatible but tricky again ..
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Old 05-21-2020, 01:03 PM #21
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I used distilled btw. I know GM had problems with dexcool so I just stick to tried and tested green stuff to keep it simple. I know it ain't a GM but whatever. Maybe with the newer Toyotas I'll use the red stuff.
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Old 05-23-2020, 05:20 PM #22
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Quote:
Originally Posted by mesooohoppy View Post
so whats the deal with people on the first page using green coolant? i thought that was a big no no in these types of cars?
Toyota says to use the Long Life coolant, but as long as you flush thoroughly, and change it every few years, you can run Green. I've been running green since 2014 when my Radiator sprung a leak. The system was totally flushed, and switched over to Silicate Free Green coolant. The issue comes with mixing the two, they can cause reactions that cause gelling or corrosion and ultimately failure of the cooling system.
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