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AMcA

Blue smoke when hot

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Hi all, 

I have a 2008 1.6 tdci focus, 

Sometimes when the car gets to operating temperature a lot of blue smoke tends to come out of the exhaust (more so when braking), and sometimes if I’m stopped at a junction I can’t take off as quick as normally, 

then after awhile the temperature cools a small bit, the smoke stops and everything is back to normal. It passes the Nct and I’ve taken it to a garage a few times but it didn’t happen there,  so I’m just wondering has anyone else this problem or knows what causes it? 
thanks in advance.

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blue smoke is caused by the incomplete burning of oil [crankcase?] maybe leaking past the valve stems

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I'm wondering if your turbo is on its way out and the oil seals are worn 

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