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Steve
Steve, BMW Expert
Category: BMW
Satisfied Customers: 23021
Experience:  BMW Expert
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I read up on your answer to smoke after idle. I did the test

Customer Question

I read up on your answer to smoke after idle. I did the test on the oil cap and I have high suction. I replaced both CCV valves and it is still doing the same including the high suction on the oil cap. I does not smoke for a short period of time when I use Liqui Moly oil saver. Could it be something else.
Submitted: 1 year ago.
Category: BMW
Expert:  Steve replied 1 year ago.
Hello and welcome,
My name is ***** ***** it will be my pleasure to assist you today.
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Smoke after idle is caused by leaking valve seals, guaranteed.
If you have high suction under the oil cap and have replaced the valves, then you may have a separate crankcase ventilation system failure - BMW released anupdated valve cover and hoses for some build date cars
The smoke after idle is definitely valve seals, though
Pleas do not forget to CLICK ON a positive rating as this is the only way I receive credit for my time and answer. Thank you