You don't have a DISA valve. DISA is only on the i-6 M52 motor. You have a M62TU motor.

You do have a VANOS, but VANOS failures are uncommon. VANOS will be the last thing to look at. You said you did your Valve cover gaskets, how long ago? What about intake manifold gaskets? How about the Crank Case Ventilation cover that goes on the back of the Intake manifold? What about the OSV which is also in the back of the motor. Both the OSV and the CCV can leak oil like a siv if the seals are blown out. The knock sound can also be gaskets with air escaping the system.

I had to have my intake done about 2009, they did plugs and vg gaskets, it was not visable, to see way up and in the back, I would like to know how much time it would take a garage to do those two that you have mentioned, and what about the timing chain cover or even the timing chain ???? please oh please help , I had to do a quick run this AM but as I said its only 1-2 seconds, KNOCK knock, i anin got no, no no no MONEY lol

Book time for Valve cover gaskets, intake manifold gaskets, OSV, and CCV is 5 hours. So figure around $130/hr at the dealership and $79-$100/hr at an indy to do the work. Plus parts.

SO you figure about $250-$300 in parts and ~$500 in labor. Lookin at a cool $800 by the time the day is out.

Now i you can source the parts yourself and can do this job yoruself, you can save a small fortune.

I have had those done 3 years ago, and they have told me that they dont believe they are leaking, the valve cover gaskets have been done, as well as the intake manifold as well, and they did the plugs and wires also, they think its coming from the transmission cooler, if it was wouldnt my motor be covered with reddish fluids ?????

I have a garage that says that I have 2 sets of gaskets on each side, and I called the shop that feels that its something else, so I need to dump 2 or 3 bottles of the untraviolet dye so they can see those colors, I want to add it in and run it for 50 miles then make sure that they can get it on the lift and then see whats leaking !

Zf tranny fluid is not ruby red. It is gold in color. But even still WTH does the tranny cooler have to do with anything? That has nothing to do with a knock. Unless they are talking about fluid. While it is possible, you never answers if they did the OSV OR CCV. Or the hoses leading to those.

I cannot find the leaks they think that the cooler is while driving 60-80mph the spray makes it hard to find, I am goiny to ask if i buy the dye and put 2 bottles in with the oil, the uv light found nothing but the only put 1/2 oz of this onto the oil, so I dont think they had put enough into the oil, I will contact them to see if they can check this for me after I add the dye, its somthing and it need fixing due to not ever giving up on my x5, if it dies, dig that hole deeper cause im gong down with it !!!

None of the hoses leak, im not following when you ask about you never answers if they did the OSV OR CCV. I dont have any idea as to what you are refering to, so Im no auto mech, all I can try to do is to relay info to the wrench to get things done by a person that can save me from having a lawn ornament prematurly, with bontiful Apples , lol

All right. I am not understanding something here. You say it is leaking fluid everywhere, but don't know where. You say the hoses aren't leaking, but you don't know what an OSV or CCV is. SO I am assuming you don't know where they are located and wouldn't know where to look in the first place.

So let's try this.

Look at the diagram below:
http://realoem.com/bmw/diagrams/j/f/79.png

P/N 2: This is the CCV. It is a common failure point for oil to leak. It is located in the rear of the motor and attached to the Intake Manifold.

P/N 10: This is the gasket for the CCV, also another failure point for oil to leak.

P/N 7: This is a vent pipe. Oil can accumulate in the tube. The rubber ends can deteriorate and leak oil.

Now look at this diagram below:
http://realoem.com/bmw/diagrams/f/t/30.png

P/N 2&6: These are the Valve cover gaskets. Now the diagram doesn't show it, but one side of the gaskets have to profile cutouts in them. They look like half moons. Those half moons fit within a recess in the head. RTV sealant must be used on certain points of the head in order for the gasket to sit properly and seal properly. Also, those half moons must fit properly within the recess. If one is just a touch out, oil is leaking everywhere.

Now look at this diagram below:
http://realoem.com/bmw/diagrams/t/x/61.png

P/N 1: This is the OSV or Cyclonic Valve. This is located in the rear of the motor and is to the left of the CCV.

P/N 4&5: These are vent hoses that attach to the OSV. These can deteriorate over time and leak oil.

P/N 9: This is the oil return hose that attaches to the bottom of the OSV. The other end attaches to P/N 14, Oil Return Pipe. This hose is sometimes non existent because of wear and tear and reduces to dust. Oil can leak there.

Now this diagram:
http://realoem.com/bmw/diagrams/i/n/48.png

This is the picture of the oil pan.
P/N 5: This is the oil pan gasket. That gasket can fail and leak oil.

Now I have given you pretty much all the most common things that leak oil. Complete with diagrams, descriptions, and their locations. Now I know you are not a wrencher, but I am going to assume you can take 4 6mm allen bolts out, a few 12mm and 14mm bolts out to remove the Microfilter Cabin assembly. From there, it opens up a lot of room in the back. Get a flashlight and just start looking. Put the X on a set of ramps or stands and look under the X too with the splash shield off. Then you have a better shot finding the leak instead of taking it to the indy.

Thank You so much for the diagrams it should prove to be useful and try to help track down, My mix up is that I have 2 garages telling me two different things, so it will not take much to look at those places to save looking in the dark at dark things , without a clue, and now have the seeing eye diagrams at my service