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Old 25-02-2015, 09:34 AM   #1
pzele000
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323 SP20 - Coolant seems going bad all the time

Hi,

It seems a coolant in the overflow bottle goes bad (a bit brown/yellow from a green color) very quickly (maybe few hundred ams). First time it happened, radiator was flushed by a mechanic and a coolant tested for an oil residue, it came out negative (so he tells me). It got replaced, soon after it went bad again. When i empty out the overflow bottle and add more coolant it goes bad again. The car runs fine otherwise, not temperature issues. Also it seems that coolant in the radiator is actually fine (when I open up the lid) and it is not leaking. Any ideas on what to do?

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Thanks,

Last edited by pzele000; 25-02-2015 at 09:39 AM.
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Old 25-02-2015, 11:38 AM   #2
TheMAN
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maybe antifreeze mixture ratio is off? Mechanic used tap water? Wrong antifreeze type?

If you're worried, why don't you just drain it all out and refill with genuine Mazda coolant (concentrate), and mix 50% of it with distilled water? Should take care of it
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Old 25-02-2015, 12:06 PM   #3
derb
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Could be a head gasket. Brown, milky coolant is almost always oil mixing with the coolant via a damaged head gasket.
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Old 25-02-2015, 12:52 PM   #4
pzele000
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I have no idea what mechanic has used. I would like to assume he did the right thing.

http://www.nulon.com.au/support/spec.../#.UkfC6WSFCRg
- Would this be a suitable replacement for Genuine Mazda Coolant?

I assume MAZDA FL22 LONG LIFE COOLANT is the one you are referring to.
Is this a right Coolant capacity (l/qts) 7.5 / 7.9? So I would need to get about 4 litres of coolant for 50/50 mix with distilled water.
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Old 25-02-2015, 03:47 PM   #5
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FL22 is premixed, it is for 2006 mazdas and newer... you need the older style mazda phosphate based coolant
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Old 26-02-2015, 08:49 AM   #6
pzele000
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I haven't been able to locate any phosphate based coolant in Aus so far. Perhaps someone knows where I could source one. Would that be a big issue if I was not use a phosphate based coolant?

Last edited by pzele000; 02-03-2015 at 09:12 AM.
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Old 02-03-2015, 09:04 AM   #7
pzele000
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How about something line this
http://www.valvoline.com/products/co...antifreeze/105

Also, I came across this resource in case someone wanted to know

"
Prior to the 2005 model year, Mazdas were equipped with a first generation P-OAT (Phosphated Organic Acid Technology) coolant develped and manufactured by CCI, the leading Japanese coolant company. P-OAT coolants rely on a combination of phosphates and organic acids to prevent corrosion; they contain no silicates or borates. Japanese engine manufacturers believe silicates and borates are undesirable because of their abrasiveness (they can attack water pump seals, for example) and they are less effective in fighting corrosion than phosphates. The other major Japanese automakers, Honda, Nissan and Toyota all use essentially the same coolant technology.

Mazda sells this coolant as: Genuine Mazda Long Life Coolant. According to the labels on the container, its ingredients are Ethylene Glycol, Diethylene Glycol, Water, Sodium Benzoate and Potassium Hydroxide. It meets ASTM spec D-3306. It is a concentrate and Mazda recommends a 50/50 mixture of Mazda Long Life Coolant and demineralized water for year round protection. The part number is 0000-77-501E-02.

In the 2005 model year, Mazda started using a second generation coolant which has a lower concentration of phosphates and an improved organic acid additive package. This in fact may be a P-HOAT formulation in which the H signifies hybrid - that is, both organic and inorganic acids are used as additives to improve corrosion resistance and further extend the life of the coolant. This is an ethylene glycol based, premixed (I believe 55/45), longer-life coolant labeled "FL22." I believe it has the same ingredient makeup as the older Mazda fluid but not having a container in front of me I can't be sure. The part number is 0000-77-508E-20.

source: http://www.clubprotege.com/forum/sho...ngine-Coolants
"
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