Turbo cool down recommendations?

[Hobb3s]

So ive see the recommendations for cooling down the turbo after driving in the owner’s manual…

my question is… if you drive hard on the highway but you drive an additional 5 min when you get off the freeway, does the turbo still need to be cooled down before power off? or will the extra non highway drive time cool it down?

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[alpa_chino]

You shouldn't have to worry about any cool downs unless you're tracking a car. The only time I've done cool downs on my Supra was when pushing it hard at the track then you do a cool down lap. Maybe if you're going uphill and towing for long periods it will really work the engine. Just normal driving you will be fine. To answer your question though normal driving after pushing it hard is fine for cool down

 

[Gumpus]

What page in owners manual?

 

[ah4rsr5]

So ive see the recommendations for cooling down the turbo after driving in the owner’s manual…

my question is… if you drive hard on the highway but you drive an additional 5 min when you get off the freeway, does the turbo still need to be cooled down before power off? or will the extra non highway drive time cool it down?

I think this would depend on the weather (hot/humid vs cool/dry vs etc...) but I wouldn't sweat it. The manual said to just leave it on for like a minute before you completely shut off if I remember correctly.

 

[alpa_chino]

^ Turbos love colder weather

 

[DustyLens]

^ Turbos love colder weather

Or thicker air in general?

I'll have to see what happens here in Phoenix.

 

[Mudbath]

I always let my turbos idle for a minute or two, but if I come off the freeway, say into a parking lot, I keep the revs low and keep some air flowing through there. That airflow is what is going to help it cool down.

 

[GoBirds]

does the turbo still need to be cooled down before power off? or will the extra non highway drive time cool it down?

No need for special cool down. I remember this question coming up on forums when I owned a WRX. That motor had a passive cooling loop that was supposed to move oil through the turbo using convection after the motor was off. I drove that car with vigor for 260,000 miles with zero issues and I did not treat it with any special care. I've heard our motors have a similar system of both oil and water cooling. Do not fear turbo motors. This is my 3rd turbo 4 cylinder, they have all been reliable and I love them.

 

[alpa_chino]

Or thicker air in general?

I'll have to see what happens here in Phoenix.

They perform better in the cold

 

[1st4runner91]

The owner's manual states, "Let turbo cool down at idle approximately 1 minute after steep hill driving or continuous driving at 62 mi/h (100km/h)" ( page 194).

Essentially, any time you come to a line at a stop sign, stop light, and/or traffic, you are arguably letting the turbo cool down.

And yes, that extra non highway drive helps cool down the turbo.

With a narrow garage, takes me a couple minutes, 1 minute on good days to park it.

You could always let it idle 1 minute when parking for peace of mind.

This is my first 4cyclinder turbo and want to take care of it too and we're talking about Toyota technology and reliability.

 

[Nodak]

The turbo is oil and coolant cooled

 

[J4Runner1]

I have a Max and when you pull into the driveway the motor basically shuts off. Not sure how you let it run in park.

Because it shuts off on its own I'm assuming its safe for the turbo.

 

[Vincenzo]

You should be more worried about a vehicle running hotter in city/stop and go, than highway driving. The oil is cooled pretty well. You shouldn’t have any issues unless you just pulled into the driveway after running from the cops

 

[Nodak]

since the turbo is also water cooled, it should run like the tundra air to water cooling system. an electric motor will spin up to cool the turbo housing after engine shutoff.

the tundra has a dedicated cooling system for the turbo intercoolers since its an air to water system.

i know on the 4R its a hybrid oil/water system and i am guessing it also has an electric pump and dedicated cooling system for just the turbo's like the tundra.


edit: 4R turbo is only oil cooled ???

adm from ccnut need to do a full breakdown on the engine system

 

[nubbins_]

The owner's manual states, "Let turbo cool down at idle approximately 1 minute after steep hill driving or continuous driving at 62 mi/h (100km/h)" ( page 194).

Essentially, any time you come to a line at a stop sign, stop light, and/or traffic, you are arguably letting the turbo cool down.

And yes, that extra non highway drive helps cool down the turbo.

With a narrow garage, takes me a couple minutes, 1 minute on good days to park it.

You could always let it idle 1 minute when parking for peace of mind.

This is my first 4cyclinder turbo and want to take care of it too and we're talking about Toyota technology and reliability.

imho Toyota probably threw that in the manual for the Hybrid, and was too lazy / didn't see the sense in dividing the manual into separate gas and hybrid sections just for that. It makes a bit of sense at least for the hybrid given frequent engine shutoffs.

For gas it just makes no sense to be uniquely concerned about this; mass market forced induction engines weren't born yesterday, and most 4R gas models (except Limited I think?) don't even have start/stop. I don't think this concern has come up in a serious way even once, in years, in various communities I've been in with turbo engines - many of which have start/stop too - at least, to the point of having to change driving habits just for it.

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