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Thread: Turbo heat up and cool down

  1. #1
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    Default Turbo heat up and cool down

    Guys

    Having run a Nissan 200SX a couple of years ago, I was always adviced to let the turbo cool down after having a good blast in it so as to let the turbo bearings cool down. Now I've got a 3.0V6 CDTi, do I still need to let the turbo cool down??

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    dont turn it off as soon as you park the car. wait for 30 seconds.

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    [Ex]Admin Duncan's Avatar
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    Yep, as above and same for the 3.0V6 I'd think. After a good blast I give mine (2.0T) 'cooling down' drive of a few minutes to let the turbo cool down. Manual says 30 seconds but I'd rather give it longer after I've gone out for a real good blast.

    Worst thing, as you probably are aware, is to go for a blast and pull up and turn engine straight off. Doing that repeatedly will shorten the turbo's life.

    D

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    Regular Member parapaul's Avatar
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    That would be why the turbo on my work astra had to be replaced at 15 months old then?....

  5. #5
    Regular Member surreyl31's Avatar
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    i would leave it upto two mins to carm down after a good run

  6. #6
    Regular Member breezephil's Avatar
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    Nice minute or two at idle is the best I think, the turbo isnt doing any work then and its still getting Oil Pumped to it, when you just turn the engine off the Blades of the Turbo are still spinning, but now they will get Hot and expand, causing problems with the bearings as far as I am aware.

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    The need for a cool down period on petrol turbos is to prevent oil carbonising on the bearings, as Diesel turbos run at a lower tempture the cool down period is not needed as much. Thats why variable vane turbos are common on diesels but not on petrols because they are built with lower tempture tollerence materials (except the new 911 turbo but thats quite expensive). I drive a Fiat coupe 20v and have seen the turbo glow red after a run, you dont get that on a diesel.

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    Regular Member wardy's Avatar
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    My wife had a Nissan Mistral (Jap import Terrano) 2.7 TD. That had a turbo timer fitted which meant you could switch off the ignition, but the engine would still run until the turbo had cooled.

    Caused a few stairs at the pumps!

  9. #9
    Regular Member Danwells72's Avatar
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    Vehicle : Vectra

    Trim : Sri

    Engine : 1.9 cdti 150

    Year : 2004

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    I have a turbo timer (its not fitted yet as im lazy lol) only cost me a few quid from ebay, worth a look

  10. #10
    Regular Member Caterman's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 V6

    Year : 05

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    mmmmmm...........wonder how easy THIS would be to fit or would CANBUS throw a fit

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