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Stop/start with turbo

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chrisw99 View Drop Down
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    Posted: 20áMará2017 at 10:19pm
I've just got a J11, the 1.2 petrol turbo dig-T version.

I've always thought, and still hear it today, that you should let a turbo spin down and idle for a bit before turning off the engine. 

How does this work with the modern stop/start engines?   I just came off the motorway after an hour of 70mph driving to traffic lights and the stop/start immediately stopped the engine.  Will this damage the turbo or has technology moved on to prevent this these days?

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PR07HET View Drop Down
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@qashqaiclub @frankiehipwell

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Post Options Post Options   Thanks (0) Thanks(0)   Quote PR07HET Quote  Post ReplyReply Direct Link To This Post Posted: 21áMará2017 at 1:05pm
The stop/start only "put the engine to sleep" like a PC or Laptop. The spin down will still be happening.
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MikeR View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MikeR Quote  Post ReplyReply Direct Link To This Post Posted: 21áMará2017 at 1:46pm
The idea of letting the engine idle before switching off was to let the turbo cool down. As it's cooling at idle the oil is still being pumped around the bearings. However, if the engine is switched off early & the turbo is still hot it will still spin but the oil on the bearings will burn off & it will be running on dry bearings because the turbo doesn't pump oil around but the engine oil pump & this will have been switched off.
Your question is very good & for this reason that I've put above I never use the stop/start. If there's been some new design I don't know but better safe than sorry.
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