Concerning the noise, when the dip stick is taken out the noise stops and your suggestion was to replace the O ring so that air can enter.
Are you sure air is suppose to enter? There were times I had a hard time pulling out the dip stick and certainly air was not entering.
The dip stick has always been tight and there has been no problems before, besides that is the purpose of the double O rings on the dip stick for it to be tight - am I right or am I missing something here? Once the dip stick is pulled out - air is sucked into the
the dip stick hole and the noise stops. Is this also part of the white oily smelling smoke
that is occurring because this started all at the same time. The smoke is not blueish otherwise we are talking about oil in the piston and worn piston rings but this is not the case.
I had taken the car to a mechanic and he suggested I may need a new engine but he would have to check it further. If he could not know immediately what the problem was I did not want any guess work so I took the car out of the shop and parked it in my garage. This is when i contacted you for advice. I've always babied my BMW it has 104K miles but runs like a new car. I drive it only on a sunny Sundays and never sees rain or snow.
Sorry I took long to reply, I was on a short vacation.