Turbo cooldown - What Subaru says
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This is a discussion on Turbo cooldown - What Subaru says within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; What do you all think of this statement by Subaru? This came out of the End Wrench, Fall 2002, Number ...

  1. #1
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    Question Turbo cooldown - What Subaru says

    What do you all think of this statement by Subaru? This came out of the End Wrench, Fall 2002, Number 20. Does this really mean I don't need a turbo timer anymore?

    start quote.

    it is not necessary to perform a cool down / idling period procedure on Subaru WRX turbo models, as was recommended with past turbo models. The current 2.0 liter turbo engine has a far greater cooling capacity and, coupled with technology advances, makes this practice no longer necessary. This explains why information about a cool down is nor included in the Impreza Owner's Manual.

    The heat contained in the turbocharger begins to vaporize the coolant at the turbocharger after the engine is stopped. This hot vapor then enters the coolant resevoir tank, which is the highest point of the cooling system. At the same time the vapor exits the turbocharger, coolant supplied from the right bank cylinder head flows into the turbo. This action reduces the turbocharger temperature. This process will continue until the vaporizing action in the turbocharger has stopped or cooled down.

    end quote.

    Thanks!
    Barthold

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    Registered User is2scooby's Avatar
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    I take it at face value. No TT for me.
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    Moderator fengshui's Avatar
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    keep 1 car magazine in the car at all times. if you feel the need for a turbo timer, sit in the car for 1 minute and read. you also save >100$

    chris
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    Registered User TristineLim's Avatar
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    Just use your common sense. Would you want to just shut off the engine after you blast down the quarter mile just because Subaru said you don't need to cool the turbo down? Probably not. I bought a turbo timer not only for the cool down period, but for the other features it has, like voltage meter, 1/4 mies, 0-60mph, 0-100mph times, shift light etc. And it looks damn cool at night.

  6. #5
    Registered User WRXin''s Avatar
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    Hmmm...I'm not buying that. Maybe they don't know that we REALLY drive our cars, or maybe I'm trying to justify the fact that I already have a TT
    Fahd

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  7. #6
    Registered User QuickSilver's Avatar
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    Technically you can't deny the facts:
    There is a cooling system in effect after the engine is turned off. The coolant will re-circulate due to basic physics.

    Is it enough?
    Subaru says so. And replacing turbos under warranty gets expensive quick.

    What does leaving the engine on do?
    Keeps the oil pump going to maintain a good lube. Does the turbo need this after the engine is off? I don't know.

    TT's have mutiple other functions.

    I think this option falls into 3 categories:

    Some people just want all the toys and gadgets> will get TT

    Some people change their oil every 1000 miles and/or use expensive Synthetic oils> will get TT

    Typical Joe Shmoe> will get TT if there's a good deal or as a gift or hand-me-down.

    'nuff said on this topic.
    '02 Plat. Wagon, Manual

  8. #7
    Registered User WRXin''s Avatar
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    Originally posted by QuickSilver

    TT's have mutiple other functions.
    Yeah they do. In the morning, I set mine to the highest setting, which is 9 minutes. I then take out my key, and let the car warm up while I'm nice and warm inside my house
    Fahd

    Floats like a butterfly and stings like when I pee!

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    Registered User 2003Platinum's Avatar
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    Ok now lets all get a grip. Lets say you dont let it cool down, and the worse case is it decreases the life of your turbo by lets say 20k miles.. Isn't that 20k miles quicker that you can give your wife/girl an excuse that you NEED a new turbo??

    Jeeeeez- I run it hard and shut it off quick ON PURPOSE! I hope Subaru of America is wrong!

  10. #9
    Registered User QuickSilver's Avatar
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    While we're going this way...does anyone know what the symptoms of an aging turbo would be? Just less boost over time? Are there any other parts that will get worn along w/ the turbo?

    Is there ANYONE who replaced their turbo because it got old??? That said, what was your mileage?
    '02 Plat. Wagon, Manual

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    I Support ClubWRX
    My TT is my boost gauge too...for ~$100 you get a digital boost gauge, with peak hold and an overboost warning, plus it tracks lap times AND it's extra insurance for my turbo...works for me!
    Armin - ClubWRX Admin/Moderator since 2002
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    Registered User pdrpowerofWRX's Avatar
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    i got tired of sitting in the car waiting for the turbo to cool off... i mean, there is only so many new mags i can read a month and i only have so many cds to listen to... ...plus i got tired of being late to movies and such because i had to wait for my turbo to cool down.
    so im glad i got my hks tt type 0 with the WRX harness... got a great deal on them both... like 85 shipped.
    '05 CGM Subaru Impreza WRX Mods
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  13. #12
    Registered User eVilsAint's Avatar
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    Isn't the turbo the one part of the engine not covered by the warranty? Maybe I'm thinking of the extended service contracts, who knows.

  14. #13
    Registered User Akiata's Avatar
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    The turbo is covered under the Emissions warranty, 3 years/ 36,000 miles.

    This topic has been beaten to death so many times even "IT'S" tired of hearing about it. Sorry for being an ass.

    Oh ya, lap times huh Armin? You know that means driving your car on a race track don't you? Are we gonna see you out there with us next season?

    p@

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    Originally posted by Akiata


    Oh ya, lap times huh Armin? You know that means driving your car on a race track don't you? Are we gonna see you out there with us next season?

    p@
    Actually...you probably will! Wanna upgrade my brakes first though...*wink wink nudge nudge*
    Armin - ClubWRX Admin/Moderator since 2002
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  16. #15
    Registered User Akiata's Avatar
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    I will sell you a set of stoptechs for 2000 installed. Just pay me the money in cash!

    I'm going through withdrawls now that there aren't any autoxes or track events. I have started driving fast again. I NEED spring to get here......

    p@

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