Help with oil leak
 

Woke up today to see oil on the ground. Not to knowledgeable about the X and its engine. It's underneath dead center. Looks like to toward the rear of the engine. There is the cover plate and a circular opening of where it's leaking. Probably about 4-5" in diameter. I have an appointment for next Tuesday but wanted to know what I might expect.

I have a 07 4.8 which I feel has been nothing but problems. I have around 101k miles.

See this thread...
https://xoutpost.com/bmw-sav-forums/...icks-info.html

Welcome to the club. Your Oil Thermostat Gasket is leaking. They go bad on all N62 engines (what you have). I just did the repair over the weekend. It's a $6 part that the dealer will charge you about $800 because of all the labor involved.

See this thread https://xoutpost.com/bmw-sav-forums/...k-2007-x5.html
I detailed out the steps (at the end of the thread) if you want to attempt it yourself.

Lol serious. Did I do a descent job describing where it's at? Anything else I should have them check/replace while there in there?

That is where mine was leaking. There isn't much there to replace, other than 2 O-rings for the oil lines that bolt onto the thermostat assembly.

Edit: it is also possible that your oil filter housing is leaking, since you mentioned it is dead center. Usually the oil thermostat gasket will leak a little bit more to the driver side. Mine had oil dripping from everywhere on that aluminum skid plate/pan. With 100k miles, I'd be surprised if it wasn't your oil thermostat gasket.

Thank for the 411. I really hate this X5! Always had bmws and this X5 is the worst. I want to upgrade next year to the new X.

Yeah... the E70 has some issues. especially the 4.8L. Very oil and coolant leak prone from several places. Not just the oil cooler thermostat. If that's all that is leaking on your X and you want to get rid of it, I would get that fixed and then dump it for something else. These cars aren't friendly to folks that bring it to the dealership. They begin to cost a lot of $$$ around your mileage. If the valve covers haven't been done, expect those to go out soon. Oh, and the valley pan, and valley pipe, upper timing gaskets, maybe a few other things...

I had the valve covers go out at 62k miles!

Just out of curiosity, there hasn't been an oil leak during the last 2 days. I have some cardboard boxes underneath the x in my garage. Any advise?

Off topic, I've noticed my heater/fan speed is all over the board. Have it on high and it blows like a beast then all of a sudden it reduces a lot even though on high. Crazy thing is I feel like it fluctuates during turns. Wondering if I need a new blower motor or something like that.

Sounds like your blower motor resistor. The motor itself is likely fine. If the fan speed is jumping around then it's the resistor. Mine went out on my E46. Not sure if its a common problem or not on our E70's. But what your describing matches the symptoms exactly.

As far as the oil leak, just keep a close eye on it. If it was leaking before it didn't magically repair itself. deposits may have plugged or slowed the leak temporarily. If it was leaking before, it will leak again.

It looks like the resistor bolts directly onto the blower motor.

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