Oil 2004 BMW

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

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.

6 Answers

F_O_R answered 7 years ago

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

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F_O_R answered 7 years ago

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

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Bob answered 7 years ago

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.

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