what would make it smoke only out of the left side tailpipewhen it sitting still while you driving everything is ok

Asked by Aug 22, 2012 at 09:38 PM about the 2005 BMW X5 4.4i

Question type: Maintenance & Repair

6 Answers

3,135

Usually a small oil leak. I could also be moisture. What color is the smoke?

1 out of 1 people think this is helpful.
4,315

Well your burning oil it sounds like, there are a couple things that it could be in the N62 engine. On each valve cover there are two covers that say BMW on them remove them. Towards the front of the vehicle on the valve covers there are round plastic looking vents. Remove the plastic covers with a pic and you should see orange rubber seals with a spring under them. Removed them and inspect for any signs of tearing in the seals. These are you diaphrams for you crankcase ventilation system they control how much vacuum is allowed in the system. If torn please replace if they are not orange also replace. The other things your looking into is the oil control rings on the pistons has gone bad and your burning oil. Or whats is most common if the seals are ok the valve stem seals are leaking oil into the combustion chamber. Sorry hope its the seals.

6 out of 6 people think this is helpful.
3,135

Well done Robert. I was going for simple and clarification and you jumped right in there. Well done!

60

If not the diaphrams being split and leaking, then look at CVV hose being clogged, especially in extreme cold weather which is hitting the U.S. as this causes same problem, extreme smoke out one side or other, and high consumption of oil, so check your oil levels, and don't drive car until fixed or you will have even more expensive repairs. When you mentioned smoke pattern, it may be condensation which freezes and blocks CCV hoses which then pulls oil into the intake, and if car warms up, it will breath just enough not to smoke. Cold weather is a cars worse enemy.

4 out of 4 people think this is helpful.
30

You are screwed. X5 4.4 engines are just now reaching a point where poorly designed valve seals go bad. Expect to pay $8,000 + for repairs. Next time, buy a Toyota.

3 out of 3 people think this is helpful.
10

Hahaha, toyota, try driving a toyota on the highway when it is windy or when its raining, nothing like Bmw

1 out of 1 people think this is helpful.

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