Oil 2004 BMW

Asked by Mar 13, 2017 at 08:27 PM about the 2004 BMW 3 Series 325xi

Question type: Maintenance & Repair

Hello I added a quart of oil to my 2004 BMW 325xi while it
was running and my car started knocking and smoking.
Why? Is there any damage?  Thanks.

7 Answers

74,525

Once the oil ran down into the engine did the noise and smoke go away?

1 of 1 people found this helpful.
251,375

Where was the smoke coming from?

It did go away. I don't know where it came from.

74,525

Did you spill oil on the exhaust? If the engine is running smooth and there is no smoke your engine probably is OK.

I didn't spill any. It went away after I shut it off and started up later.

74,525

Maybe a bunch of oil got sucked up the PCV.

50,785

Un-metered air coming into the engine from an open oil filler cap will sometimes make them run rough. Do not add oil with the engine running.

1 of 1 people found this helpful.

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