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  1. #21
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by mullerza View Post
    I have not tested it but I dont think ASS will shut down an engine that was run hard. I'm not 100% sure on the BMW but I know my ex Audi montored turbo RPM as one of its parameters.
    On our recent Cape Town road trip, I got caught arriving hot at a roadwork stop-go on the N1, with the ASS still active. My Porsche shut down immediately. I hit that ASS button very quickly to get oil pumping again. I think even Lando Norris would have considered that a very quick reaction save!
    PS. I have no idea if there is a protection lubrication system on my car. One is tempted to think there may be one.
    There are times when a little light on the dash shows that the stop-start isn't available, but that is either soon after start-up (but not always) or when the climate control is fighting the Lowveld heat (but not always).
    But, I have never seen that little light come on when driving fast on the open road.
    Last edited by RoelfleRoux; 2024/06/12 at 06:33 AM.

  2. #22
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    Default Re: Is cooling down a TD still a thing?

    To answer the OP:
    Yes, I still cool the turbo down, but mostly (when possible) by slowing down in advance. Then, I'll still allow the car to idle while I compose myself and gather my personal paraphernalia into my man bag and fiddle with whatever requires fiddling with.
    The same goes for cold starting. I'll start first, then fiddle with my stuff and get the music going, and whatever else I can think of, before driving off.

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  4. #23
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    Default Re: Is cooling down a TD still a thing?

    As above. No engine should be started up and just hammered and the same goes for shutting down. Even diesel generators have a built in timer before the engine goes under load and the same time has a cool down timer before shutting down.
    My Navara has a water cooled turbo but I still never drive hard and then just switch off.

  5. #24
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    Default Re: Is cooling down a TD still a thing?

    Good engine management.

    Pilots who fly turbo engines are good at this, they say it takes a few hundred bucks to shut down a turbocharged aircraft engine......
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  6. #25
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by RoelfleRoux View Post
    Yet, more and more of our cars are factory fitted with ASS (including your Beast), which makes an idle-down impossible.
    On my wife's Cooper S start stop was disabled for a while after working the engine a bit. Suspect the same for the other BMW engines.

  7. #26
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    Default Re: Is cooling down a TD still a thing?

    What is this ASS everyone is talking about?

    But yes, I do let my SD4 cool down after a hammering or when stopping to take a break on the highway.
    2001 Discovery 2 TD5 Auto ES. Bonatti Grey.
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  8. #27
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by mariusrautenbach View Post
    What is this ASS everyone is talking about?

    But yes, I do let my SD4 cool down after a hammering or when stopping to take a break on the highway.

    Think they are talking about the "auto start/stop" feature of the vehicles, meaning the vehicle switch itself off when it detects low idling, to save on fuel and engine wear-and-tear?

    Not sure on how it starts: by either pressing lightly on the pedal or by way of a start/stop button on dashboard?

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  10. #28
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by GroenHoender View Post
    Think they are talking about the "auto start/stop" feature of the vehicles, meaning the vehicle switch itself off when it detects low idling, to save on fuel and engine wear-and-tear?

    Not sure on how it starts: by either pressing lightly on the pedal or by way of a start/stop button on dashboard?
    Normally when the SS is active and you brake, once you stop the car switches off, as you release the brake, it starts again quick
    "K.a.k Wheeler"

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  12. #29
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by mariusrautenbach View Post
    What is this ASS everyone is talking about?

    But yes, I do let my SD4 cool down after a hammering or when stopping to take a break on the highway.
    People just throw out acronyms willy nilly.

    I searched for ASS and was greeted with so many nice other things.

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  14. #30
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    Default Re: Is cooling down a TD still a thing?

    My daughter has tested her ASS vs idling at a stop street/robot. Idling is more economical, apart from less strain on electrics and starter motors.
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    mvw

  16. #31
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by GroenHoender View Post
    Think they are talking about the "auto start/stop" feature of the vehicles, meaning the vehicle switch itself off when it detects low idling, to save on fuel and engine wear-and-tear?

    Not sure on how it starts: by either pressing lightly on the pedal or by way of a start/stop button on dashboard?
    Oooooooohhh. Didn't even think of the start stop system

    Quote Originally Posted by IcePick88 View Post
    People just throw out acronyms willy nilly.

    I searched for ASS and was greeted with so many nice other things.
    That's why I chose not to Google for once...
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  17. #32
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by IcePick88 View Post
    People just throw out acronyms willy nilly.

    I searched for ASS and was greeted with so many nice other things.

    Wish I had your luck.
    I was greeted by images of donkeys. As in animal farms. Must be my browser cookies and stuff.
    My excuse and I stand by it :P

  18. #33
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by IcePick88 View Post
    People just throw out acronyms willy nilly.

    I searched for ASS and was greeted with so many nice other things.
    All those bloody TLA's
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  19. #34
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    Default Re: Is cooling down a TD still a thing?

    Old dogs & new tricks. I am an old(ish) dog.

    I like to "idle down" after a hard run or towing anything. A hard run includes sitting at 120 (more-or-less) for hours on the open road. Always.

    Hell, I think if ever I should own an EV I will still do it.

    Since my weedeater is not turbo inspired (I cannot find one small enough to fit), I rev it silly then switch off. Clean the spark plug you see.....
    Jaco Nell

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  21. #35
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by PsyPhin View Post
    Normally when the SS is active and you brake, once you stop the car switches off, as you release the brake, it starts again quick
    With the manual Tiguan I had it, it would shut off as soon as you put the gearbox in neutral and release the clutch. It will start again as soon as you depressed the clutch. I would think that the auto box would also work on a similar principle.

    However, when the car was driven hard, and I assume the turbo is hot, when releasing the clutch in neutral did not always result in the car switching off immediately. Sometimes it took a few seconds before it switched off.
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  23. #36
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by pwgg View Post
    My daughter has tested her ASS vs idling at a stop street/robot. Idling is more economical, apart from less strain on electrics and starter motors.
    How did she test it?

  24. #37
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    Default Re: Is cooling down a TD still a thing?

    Turbo design have come a long way. Add designer oil for turbo`s and cool down idle becomes null and void. Water cooled ball bearing turbo`s have become the norm in most turbo designs. This with additives like ceramics in oil prevent damage on hot turbo shut downs.

    It is a good habit to cool down any engine after a hot run. However keep in mind engineers have to tender for those with no mechanical sympathy which make out the largest number of vehicle owners. These days turbo`s last almost the entire engine life.
    Last edited by grips; 2024/06/14 at 05:46 AM.

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  26. #38
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    Default Re: Is cooling down a TD still a thing?

    Just slow down for the last km or so.

    If I can't then I complete everything I wanted to do, get out of the vehicle and only then switch off.

    Slowing down mostly works for me.

  27. #39
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by Andrew V9X View Post
    As above. No engine should be started up and just hammered and the same goes for shutting down. Even diesel generators have a built in timer before the engine goes under load and the same time has a cool down timer before shutting down.
    My Navara has a water cooled turbo but I still never drive hard and then just switch off.
    The critical power standby generators I serviced were all big Detroit Diesel, MTU, and Cummins engines and every one of them went up to rated speed under load immediately when started and shutdown just as quick…

    The only thing they had to help was coolant and oil sump heaters to keep fluids warm and most were 20+ years old with few but hard hours…

    Rarely had any major failures, but a turbo now and then for obvious reasons…
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  29. #40
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    Default Re: Is cooling down a TD still a thing?

    Quote Originally Posted by AardvarkNV View Post
    The critical power standby generators I serviced were all big Detroit Diesel, MTU, and Cummins engines and every one of them went up to rated speed under load immediately when started and shutdown just as quick…

    The only thing they had to help was coolant and oil sump heaters to keep fluids warm and most were 20+ years old with few but hard hours…

    Rarely had any major failures, but a turbo now and then for obvious reasons…
    We did the same, however ours were 2MW Pielstick engines, and had oil heaters as well as coolant heaters, added to this they had pumps on both circuts so there was always good oil pressure and good coolant circulation. Start and full load in seconds and back again once power was restored, however they would still be on a cool down timer to get the mad heat out of the turbos. And they would always have oil and coolant flows to the turbos. Never had a failure.
    My old 280 4x4 Isuzu has an egt gauge and I don't allow it to go over 700° and I never shut it down unless it is under 200°. It's habit now.

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