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Coolant boiling...how does it look like?

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Old 05-25-2018, 10:19 PM
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Coolant boiling...how does it look like?

I been hearing about coolant boiling on RX8's...maybe im getting paranoid but coolant reservoir have these water droplets inside like these after a run.

But this is normal right?

Coolant boiling...how does it look like?-coolant-bottle-overflow-mod.jpg

Coolant boiling...how does it look like?-coolant.jpg
Old 05-26-2018, 07:32 AM
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It will boil out of the tube on the right.
Old 05-26-2018, 08:19 AM
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But the sample picture i got are normal right?
Old 05-26-2018, 07:53 PM
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I mean, if you are really worried, you can hook up a Bluetooth OBD2 reader to find out what you ECT is.
Old 05-26-2018, 09:58 PM
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Originally Posted by jorlanjm
But the sample picture i got are normal right?
If your coolant were actually boiling it would escape through the overflow tube.

The cap is a relief valve set to ~13 psi. If the coolant actually boils, it will overpressure the system and the cap will relieve the pressure and you'll get coolant spewing out that tube.

If that isn't happening then you're fine. The appearance of the air separator tank is meaningless.
Old 05-29-2018, 09:42 PM
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But, your tank looks a lot like mine. I would not worry about how it looks. But, I would get a way to monitor temps. I really like the ultragauge.
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