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Coolant usage?

Originally Posted by Q8y_drifter What about coolant being released from the overflow tank? At what coolant temperature does the coolant overflow? You should have coolant coming coming out of the

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Old 12-17-2012, 12:07 PM   #16 (permalink)
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What about coolant being released from the overflow tank? At what coolant temperature does the coolant overflow?
You should have coolant coming coming out of the reservoir only when you have grossly overheated the engine. Shouldn't happen unless you boil the coolant. The temperature where coolant boils depends on type, concentration, and system pressure. IIRC, it's somewhere around 230F for classic cars, but may be higher in modern vehicles.
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Old 12-19-2012, 09:26 AM   #17 (permalink)
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Originally Posted by Q8y_drifter View Post
What about coolant being released from the overflow tank? At what coolant temperature does the coolant overflow?
It also overflows if you have grossly overfilled the tank way past the MAX mark like what my dad did in his car.
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Old 12-19-2012, 11:33 AM   #18 (permalink)
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Originally Posted by Grindkiezer View Post
I've noticed that my coolant reservoir has been basically empty since I got the car, when I brought the car in a few times for minor services they leave it how it is of check if off as being fine.

This can't be right, right?

So I kinda have the same question as you regarding the usage of the coolant (if any) especially since the dealership ignores it at every service.
Congradulations on having a empty coolant tank. Your prize will soon be a rusted out radiator core. You need to get it topped off at the stealership a.s.a.p.
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Old 12-19-2012, 11:53 AM   #19 (permalink)
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i check coolant level on my Z on a regular basis, and it's been 3yrs+ no need to add.

the coolant in the Z is some special formula they started using that is suppose to last like 7yrs or something without needing drain/fill.
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Old 12-19-2012, 12:21 PM   #20 (permalink)
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i check coolant level on my Z on a regular basis, and it's been 3yrs+ no need to add.

the coolant in the Z is some special formula they started using that is suppose to last like 7yrs or something without needing drain/fill.
According to Service Manual MA-8 and MA-9, note (4), the coolant filled at the factory is good for the first 60,000 miles or 48 months. Thereafter, replace every 30,000 miles or 24 months.
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Old 12-19-2012, 01:05 PM   #21 (permalink)
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According to Service Manual MA-8 and MA-9, note (4), the coolant filled at the factory is good for the first 60,000 miles or 48 months. Thereafter, replace every 30,000 miles or 24 months.
huh, that's odd. 4yrs is what my G has with the green fluid. and the drain/fill cycle you posted is what ive been doing on my G. (my G's 8yrs old).


my z came with blue coolant. specially formulated for longer duration so i thought i read. next time i see my Z i shall check the manual again.
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Old 12-20-2012, 02:25 AM   #22 (permalink)
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Is this extended life coolant code named "FL22"? On my Rx8, the manual does say something about a factory-filled long life coolant that Mazda calls "FL22". The manual says you don't have to change your coolant for the first 48 months too. Thereafter, its once every 2 years. There are FL22 stickers on the radiator cap or on the reservoir tank to tell you its long-life coolant. Just a fancy code I guess... In reality, I think its just a 50-50 pre-mix.
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Old 01-21-2013, 01:28 PM   #23 (permalink)
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anyway, mr.jar (member here) confirmed wat i read in the owner's manual. 7yrs or 105k miles for the first change. i forgot to look in the manual when i turned the tires a few weeks back. my car's in hibernation with cover on so kind of a hassle to pull out just the owner's manual from inside.
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Old 07-11-2024, 06:39 PM   #24 (permalink)
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I'm noticing my engine temperature is running higher than normal. Now it is 105° here, outside temperature. I can't see the level marks in the tank, never have been since I've owned the car. It looks to me as if it could be emptied but I can't see the levels properly. I just shut off my engine picking up my coolant now from my storage and as the car sits it's almost at three clicks to the highest temperature. Of course that's freaking me the hell out.
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Old 07-11-2024, 06:46 PM   #25 (permalink)
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Default Coolant usage?

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Originally Posted by VR4NIN View Post
I'm noticing my engine temperature is running higher than normal. Now it is 105° here, outside temperature. I can't see the level marks in the tank, never have been since I've owned the car. It looks to me as if it could be emptied but I can't see the levels properly. I just shut off my engine picking up my coolant now from my storage and as the car sits it's almost at three clicks to the highest temperature. Of course that's freaking me the hell out.

Sounds like you have a coolant leak, causing your car to run low on coolant, suck in air, and overheat. You’re going to need to fix the leak and then refill and bleed the system.

Edit: I see u edited the original post.. if your car isn’t overheating, you might just be able to add some coolant without rebleedimg the system. Still check for leaks tho

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Old 07-11-2024, 07:36 PM   #26 (permalink)
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Originally Posted by VR4NIN View Post
I'm noticing my engine temperature is running higher than normal. Now it is 105° here, outside temperature. I can't see the level marks in the tank, never have been since I've owned the car. It looks to me as if it could be emptied but I can't see the levels properly. I just shut off my engine picking up my coolant now from my storage and as the car sits it's almost at three clicks to the highest temperature. Of course that's freaking me the hell out.
When was the last time you checked the coolant level before this?
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