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      01-25-2013, 04:37 PM   #1
heverlee
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still need idle for a while to cool the turbo?

Hi

Just wonder for 2013 X3, should it be left idle for a while after drive to let the coolant/oill to cool the turbo? I heard this was one major cause of turbo reliability in older ones like the VW 1.8T engine.

thanks
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      01-25-2013, 05:05 PM   #2
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Quote:
Originally Posted by heverlee View Post
Hi

Just wonder for 2013 X3, should it be left idle for a while after drive to let the coolant/oill to cool the turbo? I heard this was one major cause of turbo reliability in older ones like the VW 1.8T engine.

thanks
I don't think it's necessary, especially during cold weather, if you haven't run it really hard but was just driving 'normally'.
Btw, I used to own a GTI with the 1.8T. Bulletproof and never a problem for many miles.
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Last edited by noka; 01-26-2013 at 02:34 PM.
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      01-25-2013, 05:43 PM   #3
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The water pump is electric and the car runs it as required even after you've shut it down.

My belief is that this should help things. One thing, however, is I don't think the water is used to cool the turbo so it may not help at all.
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      01-25-2013, 06:21 PM   #4
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hmm, what is this new fangled start/stop thing you guys talk about?

I suppose that would do more harm having a hot turbo cooking the oil while shut down for 30sec then restarted.
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      01-25-2013, 07:48 PM   #5
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this is really a good point.


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Originally Posted by lbjgh View Post
hmm, what is this new fangled start/stop thing you guys talk about?

I suppose that would do more harm having a hot turbo cooking the oil while shut down for 30sec then restarted.
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      01-26-2013, 12:00 PM   #6
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I asked the dealer about that. He said that with synthetic oil and modern turbo design and materials, the old turbocharger cool-down requirements are a thing of the past.
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      01-26-2013, 01:35 PM   #7
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Quote:
Originally Posted by heverlee View Post
Hi

Just wonder for 2013 X3, should it be left idle for a while after drive to let the coolant/oill to cool the turbo? I heard this was one major cause of turbo reliability in older ones like the VW 1.8T engine.

thanks
Yes, they've intentionally designed the car so it'll self-destruct if operated normally.
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      01-26-2013, 02:06 PM   #8
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      01-27-2013, 05:15 AM   #9
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All modern factory-turbo cars use water-cooled turbos.

Synthetic oil's one big difference from Dino is it cokes instead of sludging. Without the water cooling you would still need to idle or get a turbo timer.

If you have been beating on it, let it idle a minute(ish) before turning off I guess. It isn't that big of a deal
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      01-27-2013, 12:11 PM   #10
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I believe the water pump cools the turbo even after the car is shut off and the oil is only used to lubricate the turbo bearings.
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      01-27-2013, 05:19 PM   #11
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Needing to let the turbo "cool down" isnt a big deal anymore like has been said.

It used to be a huge issue and was the reason why turbo timers were all the rage when people started boosting every car out there.

I have a big turbo MK4 GTI and after beating on it nice and good I do let it cool down before turning it off.

My 135i though? Nah, its good. Beat on it then idle maybe a minute once i get parked then off it goes, same will be the case for my X3 when it comes in a couple months.
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      01-27-2013, 06:40 PM   #12
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the n20 engine cool down is already fast as it is.
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      01-27-2013, 07:46 PM   #13
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I had a 1.8T Passat and did this routinely to protect it. I don't bother with the N55. The Passat had some absurdly small oil capacity, as I recall. That, coupled with the use of non-synthetic oil (at least initially), didn't help.
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