Protecting your turbo - turning off the hybrid engine

[Sagebrush]

You clearly didn’t read the thread at all. Nice

It never ceases to amaze me how some people can be so bold and asshole-like on social media.

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[WKTJR1]

There is a less than 0% chance Toyota did not account for this in the design.



I dont know the source of this but would assume thats accurate.

Electric pump circulates coolant; hybrids run the engine fans near constantly when the engine is not running, likely to account for turbo and engine cooling with the start-stops.

Since there is nothing (that I’ve seen so far) in the hybrid owner’s manual, this is likely your answer in the previous responses. Cheers!


(Older diesel engines, especiallly heavier trucks and equipment, certainly needed this cool down period for the turbo, eg: a semi or a dozer. But this is generally accounted for or protected against by automatic systems in modern passenger cars.)

https://www.tacoma4g.com/forum/threads/t24a-fts-engine-detailed-tech-specs.6749/

 

[ChrisWhaaaat]

It never ceases to amaze me how some people can be so bold and asshole-like on social media.

The question is about hybrid engines turning off and whether the turbo still cools In that scenario With the engine having shut itself off. There is no ‘idle for a minute when you get off the highway’. The computer is deciding when the engine does or does not run, even during a drive cycle. Nothing about warming up. You’re the one who came in with “it’s a simple thing“ implying stupidity of the question yet you didn’t understand the truck shutting off. You’re the asshole.
All I said was you didn’t read the thread, and ‘nice’ because you implied it was simple. But way to get upset. You caused that.

 

[ChrisWhaaaat]

As I was poking around the internet, I came across this site. It's more about the engine family and not the Tacoma installation per say but is interesting if your into the technical side of things.

https://www.toyota-club.net/files/faq/21-09-20_faq_t24-engine_en.htm

Thats great info, good share, thank you

 

[trailhunger]

I have read that you should idle for a minute before turning off your motor, especially after heavy load, to let the oil in the turbo drain out fully so it doesn’t cook inside the turbo. When it cooks in there and cannot drain, the oil loses life and the turbo can get clogged over time by coked oil. This all leads to a shorter life for the turbo. Is this true? If it is, how does this work exactly? Because when I idle my engine is already shut off automatically by the ECU as I drive a hybrid. Car care nut says to do this so it must be true, but I want to understand the idling part.

so…yea the iForceMax will shut the engine down and run fans etc automatically in the background but you can technically shut down all power to the truck and kill those fans and pumps that are cooling those systems.
I guess you could call it ‘sit in the truck for a minute before killing power.’

I don’t recall a scenario where I killed power to the truck and heard fans and pumps running (although I have heard a few weird motor noises several minutes after killing power). Kinda odd, but maybe there are critical involuntary systems at play to cool the turbo if you kill power in the hybrids.

 

[Dalingrin]

Turbos might be new to you but they certainly aren’t new to the automotive industry. Stop worrying about it.

If you’re driving 100mph for hours then immediately stop and turn off the engine then yeah, that’s probably not amazing for the truck. Generally speaking, people don’t just immediately come to a stop though. They get off an exit ramp, come to a stop or at least a yield, and pull into a parking lot, etc. During all that time off the highway your turbo is cooling down, there’s no need to come to a stop and sit in your truck for a minute before you turn it off.

 

[crepr12]

hmmmn...I got over 122K in turbo cars in the last 10 years various makes...I think its a non issue even with the hybrid systems shutting down the engine....

 

[tacorancher]

so…yea the iForceMax will shut the engine down and run fans etc automatically in the background but you can technically shut down all power to the truck and kill those fans and pumps that are cooling those systems.
I guess you could call it ‘sit in the truck for a minute before killing power.’

I don’t recall a scenario where I killed power to the truck and heard fans and pumps running (although I have heard a few weird motor noises several minutes after killing power). Kinda odd, but maybe there are critical involuntary systems at play to cool the turbo if you kill power in the hybrids.

Makes sense wand will test

 

[tacorancher]

Makes sense wand will test

Makes tons of sense but is it true that the manual only says to “idle” in the [non-hybrid]? I’m traveling but will check my own manual upon return.

 

[TacoFreak]

They are all turbos, but I assume you meant hybrids. The hybrid system shuts off the ICE engine frequently. I am 100% sure that Toyota accounted for engine and turbo cooling and turbo oil flow after it shuts off. I read that all of the accessories were electric on the hybrid so the critical systems would stay on even when the ICE is not running. My truck air conditions as well on the battery as with the engine and starts the engine when needed. Even a power hybrid is amazingly complex in Toyota land. As an engine geek I think that all of is cool as hell. lol

 

[tacorancher]

They are all turbos, but I assume you meant hybrids. The hybrid system shuts off the ICE engine frequently. I am 100% sure that Toyota accounted for engine and turbo cooling and turbo oil flow after it shuts off. I read that all of the accessories were electric on the hybrid so the critical systems would stay on even when the ICE is not running. My truck air conditions as well on the battery as with the engine and starts the engine when needed. Even a power hybrid is amazingly complex in Toyota land. As an engine geek I think that all of is cool as hell. lol

Yeah I meant non-hybrid - all that makes sense just want to know if the hybrids keep the air fans on and coolant flowing after you power off the engine— probably not

 

[TacoFreak]

Good question. The fans might remain on but probably not the coolant flow. But I don't really think that this will be a problem in most use. I believe that coolant and/or the oil flow continue after the engine is turned off in both hybrid and non hybrid powertrains. Toyota is not known to take wild ass chances on their engines, which is why the normally run pretty much forever.

The idle for 1 minute is a CYA kind of thing IMO, and would seldom really be required unless you towed a heavy trailer through the Rockies. If it was the hybrid system would never shut down the ICE engine so often. Or at least that is what I hope.

 

[tacorancher]

Good question. The fans might remain on but probably not the coolant flow. But I don't really think that this will be a problem in most use. I believe that coolant and/or the oil flow continue after the engine is turned off in both hybrid and non hybrid powertrains. Toyota is not known to take wild ass chances on their engines, which is why the normally run pretty much forever.

The idle for 1 minute is a CYA kind of thing IMO, and would seldom really be required unless you towed a heavy trailer through the Rockies. If it was the hybrid system would never shut down the ICE engine so often. Or at least that is what I hope.

Good points. I’ve also noticed that the engine manages itself. In other words it sometimes does not shut off at a stop, perhaps it just monitors temps and knows when it can and can’t, which is probably how it works.

 

[TacoFreak]

Yeah - I'm never 100% sure what hybrids are doing or why, but I do know they work very well in the 4th gen Tacoma. My dealer ups the Toyota engine warranty to lifetime of ownership and includes the whole hybrid system, soo they seem to think they are going to be fine.

 

[tacorancher]

Yeah - I'm never 100% sure what hybrids are doing or why, but I do know they work very well in the 4th gen Tacoma. My dealer ups the Toyota engine warranty to lifetime of ownership and includes the whole hybrid system, soo they seem to think they are going to be fine.

Lifetime? Wow. I have faith in it but I don’t think it will go forever. Expecting 200K miles and will be more than happy with that.

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