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Bmw 120d 2006 blue smoke cold start up

326 Views 1 Reply 2 Participants Last post by  0l0dom0l0
I have noticed a puff of blue smoke on cold start up. Full history 138k miles. Original turbo. Crank case breather done last year (oil leaking from boost pipe) mpg 42. Glow plugs also done. Egr and swirl flaps not done.

Any ideas?
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If it's just a puff I wouldn't worry about it.
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