Turbo 1 minute cooldown time?

[spiderjoe]

Anyone actually following Lexus manual recommendation to idle 1 minute after driving over 62mph (100 km/h) or steep hill/track driving - see manual page 172.

I am planning to keep ours long term and keeping the 3.4V6 TT relatively trouble free is my main concern down the road. Was thinking maybe I can lock the car with engine running and use the Lexus remote app to stop it after a minute or so. Thoughts?

 

[Bluegill]

I've always considered the minute or so of slowing down and cruising through my neighborhood to my house at 10-15 mpg to be a sufficient cool-down period. If you really want to time out a minute of sitting still and idling, I think it would be easier to just sit there for a minute vs. trying to use the app to shut down.

You also can't leave the car with the key fob in your hand and lock the car with the engine running. I've tried this many times when I've picked up 1 son from aftercare and then I want to leave that son in the car and run into his little brother's aftercare to grab him. Of course I leave the car running for the 1 son left in the car but you can't bring the fob and lock the car. I have to leave the engine running, leave the fob in the car, and have my son manually lock the doors and then unlock them when I return if I want him to be 100% secure with the engine running.

 

[Cajun Heat]

Anyone actually following Lexus manual recommendation to idle 1 minute after driving over 62mph (100 km/h) or steep hill/track driving - see manual page 172.

I am planning to keep ours long term and keeping the 3.4V6 TT relatively trouble free is my main concern down the road. Was thinking maybe I can lock the car with engine running and use the Lexus remote app to stop it after a minute or so. Thoughts?

I would follow those instructions if you have been driving it hard. The cool down period is to prevent oil coking. Not a big deal to skip this after regular driving.

 

[spiderjoe]

Thanks Bill and Shawn.

Coming home and slowing down for last few minutes makes sense. It is the highway bathroom breaks, sometimes you just forget and want to run in for a pee lol . Guess we just have to make it a habit to remember to wait if its a hard drive.

I wish Lexus has an option to set a reminder for us to "cool" down engine if it detected high oil temp and/or pressure. Or go back to the old days and give us a turbo timer. One minute is not too long to wait in the car but I bet you there will be many who didn't read the manual or don't know about it.

 

[JPE]

I've wondered why manufacturers don't add an auxiliary electric oil pump that would run for a minute after you shut the car off.

 

[rangertrace]

I've always considered the minute or so of slowing down and cruising through my neighborhood to my house at 10-15 mpg to be a sufficient cool-down period. If you really want to time out a minute of sitting still and idling, I think it would be easier to just sit there for a minute vs. trying to use the app to shut down.

You also can't leave the car with the key fob in your hand and lock the car with the engine running. I've tried this many times when I've picked up 1 son from aftercare and then I want to leave that son in the car and run into his little brother's aftercare to grab him. Of course I leave the car running for the 1 son left in the car but you can't bring the fob and lock the car. I have to leave the engine running, leave the fob in the car, and have my son manually lock the doors and then unlock them when I return if I want him to be 100% secure with the engine running.

If you second fob is inside the car, you can lock it with the other one. I keep my second one in my backpack and learned this last week.

 

[GX550Key]

Still waiting on my order but on my current Turbo V6 Diesel I just let the oil temperature go under 100 (C) and usually takes much less than a minute.

 

[ACJS]

I've always considered the minute or so of slowing down and cruising through my neighborhood to my house at 10-15 mpg to be a sufficient cool-down period. If you really want to time out a minute of sitting still and idling, I think it would be easier to just sit there for a minute vs. trying to use the app to shut down.

You also can't leave the car with the key fob in your hand and lock the car with the engine running. I've tried this many times when I've picked up 1 son from aftercare and then I want to leave that son in the car and run into his little brother's aftercare to grab him. Of course I leave the car running for the 1 son left in the car but you can't bring the fob and lock the car. I have to leave the engine running, leave the fob in the car, and have my son manually lock the doors and then unlock them when I return if I want him to be 100% secure with the engine running.

Yes you can lock the car and take your key with you while it's running. Your key fob has a metal key that pops out and inserts into the drivers door handle like a regular normal key. Park and leave car running, dont shut off engine. Pop metal key out, insert and turn left to lock. Turn right to unlock. The cool credit card key fob also has a metal key that pops out and does the same thing.

 

[Bluegill]

Yes you can lock the car and take your key with you while it's running. Your key fob has a metal key that pops out and inserts into the drivers door handle like a regular normal key. Park and leave car running, dont shut off engine. Pop metal key out, insert and turn left to lock. Turn right to unlock. The cool credit card key fob also has a metal key that pops out and does the same thing.

Ah, interesting....good thinking!

 

[Jesse H]

How often does anyone go from a situation where the turbos are at full boost to immediate shut down? I remember the old days of turbo timers but that's on high performance cars running additional boost and old oil tech. You'd definitely want to let things cool down after an autocross run or a few laps at the track and pulling back into the paddocks.

Worst case scenario, I've got the truck loaded down and a 8k lb trailer and I just climbed a steep grade, by the time I exit the highway to a gas station or rest stop it's got a chance for the oil to cool down. Just cruising on the highway at 80 mph is actually pretty easy on the motor.

 

[GX550Key]

But when towing, it a good idea to watch oil temp, at least the first while. That seems to confirm what I've heard that both the V6 & 10 speed run with good temp control.

 

[nopantz]

But when towing, it a good idea to watch oil temp, at least the first while. That seems to confirm what I've heard that both the V6 & 10 speed run with good temp control.

To help with this, I created 3 screen displays -
1) normal driving - efficiency, basic temps, audio
2) off-roading - traction info, basic temps, pitch/roll
3) towing - full temp info, etc

 

[spiderjoe]

To help with this, I created 3 screen displays -
1) normal driving - efficiency, basic temps, audio
2) off-roading - traction info, basic temps, pitch/roll
3) towing - full temp info, etc

I don't think the oil temperature display shows the actual temperature - just a line/scale with red at the end if it overheats?

I am still going through the manual learning about the car, and probably felt asleep reading it many times, so many pages of information..