N63 oil pan leaking,,,,a common place for them to leak is just next to the oil filter housing and the corner of the trans and oil pan,,,,sometimes we have seen the oil pan crack,,,,the aluminum oil pan is so thin ,,,, that I think it flexes and cracks causing a oil leak,,,,the pic with the gear and chain,,,,is the gear for the oil pump and oil pump chain,,,,,,you have to remove the oil pump to remove the oil pan,,,,when you install the oil pump you have to adjust the oil pump for the right tension on the chain,,,,if the tension is too tight it will cause a noise,,,,,too loose it could cause a chain rattle noise,,,,,it need 10mm free play in the chain.
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bmwtechnician 
Hey I was wondering if it is possible to remove oil pan upper and lower on n63 rear wheel drive 550i with engine in car. If so could you help me with how?
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Yes it can be done,,,,but it’s a tight fit and won’t be easy doing it your back,,,,you will also need a lot of special tools,,,you will have to support the engine,,,,because you will lower the subframe about 3 inch,,,you also have to remove the oil pump,,,you will need a special tool to adjust the oil pump chain when you put it back in,,,,you will just lower the upper oil pan and slide out the oil pan gasket and then slide in the new one.
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Hey thanks for the response, I have a lift I will be using. I need to remove upper and lower completely to check on internal bearings.
Can you link me to specific tools I will be needing?
Thanks!
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Why do you want to look at the internal bearing,,,,,I don’t have a link for tools,,,,the main one you will need is to check and adjust the oil pump chain to 10mm slack in chain
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Rod bearing issues. I couldn’t find where to find the tool for gauging chain deflection.
I planned on supporting engine and dropping full subframe if it was a do able task. Any tips? Looking to do it this weekend. Slight rod knock on one cylinder. Going to see if crank has any scores on it or if it just needs a new bearing and will be good to go. I know they swapped bearing materials and had failures.
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No there really no special tips,,,,,its pretty straight forward,,,,just take your time,,,,this job takes about 12 hours to replace rod bearings
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I as thinking if you want to check the bearings,,,,you will have to completely drop the subframe so you can remove the lower and upper oil pan.
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the noise that it makes when over-tight, is it like a whine/howling in cold starts and then it kind of goes away?
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Are we talking about the N20 and N26 timing chain whine,,,,if we are the whine noise during cold start and goes away is normal ,,,,the timing chain whine is always there while reving the engine hot or cold
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HI I have a 2009 328i xdrive coupe,sulev-n51..I have oil on the oil pan. I was wondering where the oil pan is? What are some places the oil could be coming from to go on the oil pan. How does someone find out where the leak is coming from.Thank you for all your advice.
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The oil on the oil pan can be coming from several places,,,
1) oil pan gasket could be leaking
2) valve cover gasket could be leaking down to the oil pan
3) oil filter housing could be leaking down to the oil pan
Those are the most common oil leaks,,,,,you need someone to look at where the oil is coming from or have someone clean the engine and drive the car for a mouth and recheck to see where the oil leak is coming from.
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Hello does anyone recall the service bulletin for oil pan gasket from Bmw ?
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There is no service bulletin for a oil pan gasket.
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Hi, my car (x5 n63) is at the dealer for valve seals job. The engine is out at the moment. Should i ask to replace both the oil pan gaskets (will it require less work for tech). What other thing should i consider or pay attention to while the engine is out?
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Yes you could have both oil pan gaskets replaced now,,,,you could save some money now.
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Any other weak points/items to consider?
thanks for sharing you experience
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Under the turbos there is a thing we call a volcano which starts to leak over timing,,,you should probably replace it now because the turbos will be off now and you could save money replacing it now
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Hey,can failed upper oil pan gasket cause presence of oil in coolant (just several drops as for now)? Any other things I have to look into? X5 n63. It passed the compression test and valve seals along with rear main seal were replaced 600 miles ago.thanks
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No a failed upper oil pan gasket can not put oil into the coolant,,,just check out the coolant upper by-pass hose that Y off to each cylinder head sitting behind the alternator
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Hi. How can I adjust the oil pump chain when the adjuster is not accessible with the pump installed? Is it a matter of pump off then adjust then install the pump and check freeplay ( trial and error)?
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Yes it’s kind of trial and error,,,,you need 10mm slack in the oil pump chain,,,to tight and you will have a whine noise and to loss you will have a rattle noise.
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What are some causes for a oil pan gasket to break to cause oil on the pan?
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Some of the causes for a oil pan gasket to leak is age and heat
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2014 550i xdrive, front U-joint failed and knocked hole in upper oil pan. Is it possible to replace as you instructed earlier on the rear drive model?
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Yes you can replace the upper oil pan ,,,but it won’t be easy,,,you will have to support the engine and lower the front subframe and drop the front differential,,,,hopefully nothing else got damaged inside the engine.
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If the leak is from a lower oil pan, do I still need drop subframe etc. or taking stiffening shield is enough? Anything I need to be aware of?
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No subframe,,, just the stiffening shield
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