Bmw 320d engine smoking

Blue smoke is caused by oil. Rich running causes black smoke and will set the check engine light. Rich running (black smoke) on startup could be caused by a leaking injector. The blue smoke puff at startup is likely valve stem seals leaking or a bad crank case vent malfunction and sucking oil into the manifold at high vacuum conditions.

I'd get a compression check done...

head gasket

This sounds as if you have a rather High Mileage vehicle. (100,000+)
The puff of blue smoke is oil being burned in the cylinders. When the engine is cold, it will burn some oil, usually sucked in through the Valve Stem Guides.
Then after the motor warms up, and all the metal parts swell a little, it stops smoking as much. It is STILL smoking, but not enough for you to see it.

Obviously, you are losing engine oil, so check the oil level often, and refill/change as neccessary.

The 'strange smell' could be many different things. My best guess is that you have Oil Leaks on the engine, which is dripping on to the Exhaust Manifold, and getting burned there. Usually a Valve-Cover Gasket leak. When the car is all warmed up, open the hood, with the engine running, and see if there is any whitish smoke rising from the motor. if so, you have a leak on to the manifold. A very common problem, easily repaired. Or, you may have a leak in the heaters' Core, which will leak Anti-freeze into the cabin of the car. That would smell sort of sickly-sweet. This will be a much more expensive problem to repair.

Anyway, it sounds as if the car is in need of some maintenance.

Sounds like white smoke is antifreeze. It might be leaking all of the time. Does your antifreeze level fall gradually over a week's time?

You should get the car into a shop and have a compression test done. For some reason your engine is burning oil and a compression test that will show leakdown can help pinpoint the problem. Hope this helps.

You have blown the oil rings.

blue smoke is a sign that its burning a little oil!usuallyits oil seeping thru oil guide seals

normally blue smoke is burning oil and if this is the case you may have a valve stem oil seal which is leaking these prevent oil getting into the top of the bore via the valves. if it does you grt the oil burning on start up givivg blue smoke and to fix these you may have to remove the cylinder hesd i work on lorries and classic cars and some you can get away with leaving the head on but have never worked on a bmw

Hi!

What type of smoke can you see---

white smoke-
If you see a wispy, lingering white smoke that has a bittersweet smell, this is an indication that your car's engine coolant is leaking into the combustion chambers. This may be due to a leaky head gasket, or in a worst case scenario, a cracked cylinder head.

Make sure to take your car to the shop right away to get it fixed.
Thick white smoke---
If your vehicle is belching white smoke upon start-up, it is a sign that transmission fluid is entering the combustion chambers, possibly though a vacuum tube that connects the engine to the transmission.
This type of smoke can be confused with the normal puff of steam during start-up. If you are not sure, have your car inspected at the shop.

Blue/White Smoke--
A blue/white smoke is an indication that oil is being sucked into the combustion chambers through the valve guides. A quick fix for this problem is by replacing the valve seals. Valve seals are small, umbrella shaped pieces of rubber.

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Thanks
Rylee.