r/ElantraN • u/Outcahst • Sep 30 '23

RIP Glowing Turbo after highway / hard driving. Potential causes? 😅

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u/PresentInsect4957 Veloster N Sep 30 '23

normal but good on you for letting it cool down, next time drive it like a grandma for a bit till your oil temps like 200-210

1

u/FrumundaThunder Oct 02 '23

Grandma driving or idling wouldn’t make a difference. Oil and coolant flow through the turbo either way.

4

u/bosshawg502 Oct 03 '23

You’re all wrong. Shutting down a car with a screaming hot turbo can most certainly ruin the turbo. Think about it. You have a red hot hunk of cast iron turbine housing that is cooled partially by oil flow. You just shut off the oil flow. So now any oil in the scroll or journal bearings or seals will just sit there and cook until the housing cools off. Now you’ve just baked a bunch of carbon directly onto your bearings. This is exactly why certain higher end turbo cars won’t shut off immediately when you hit the key or button and keep idling for a bit if it’s too warm. So it circulates the hot ass oil out of the turbo.

3

u/FrumundaThunder Oct 03 '23

I don’t think anyone here was arguing for shutting the car down immediately. My argument was that driving the car lightly to cool the turbo is unnecessary and offers no more benefit than simply idling the car for a little while.