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      10-11-2022, 10:01 AM   #1
pil2255
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Smile 2016 F10 M5 Comp smoke after Warm engine idling

Hi All

I have noticed that i have an initial puff of white / blueish smoke when revving the engine after a lengthy period of idling (5mins approx) this then subsides and no noticeable smoke after when driving. Anyone have any ideas on this ? is this normal?
Thanks Mike
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      10-11-2022, 02:48 PM   #2
m5rosco
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Valve stem seals are normally the culprit for that. May be worth checking/replacing the PCV valves first though as they are fairly cheap and are easy to change and can cause oil to be burned/smoke. Stem seals are a major and expensive job!

Last edited by m5rosco; 10-11-2022 at 03:07 PM..
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