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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Transmission Leak, Fix? -HELP!



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      04-09-2012, 04:00 PM   #1
cdavi060
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Question Transmission Leak, Fix? -HELP!

Hey Guys,

Just purchased a 2006 BMW 330i and noticed it was leaving a spot on the ground at colder temps. I did searched the forums here and see both the gasket and Mechatronic sleeve o-rings can cause transmission leaks. I got under the car and snapped some photos. Due to the high amount of fluid all around the filter and on bolts, I am guessing I need to change the gasket? Can anyone provide their insight as to what exactly I should change so I buy the correct parts? Pics below.
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      04-09-2012, 05:20 PM   #2
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The most likely cause of leaks on a 330i is the mechatronics sealing sleeve.

How many miles on the car? If you are nearing 100k, might as well do a coolant flush/fill, replace pan (filter is built into the pan, along was pan gasket) and replacement mechatronics sleeve while your at it (it's easier to replace the sleeve with the pan dropped anyway).

You can buy everything you need from www.thectsc.com, they sell whole kits for transmission service.

For the pan (which includes, gasket, o-ring, drain plug, two new magnets and filter) along with 6 liters of fluid.

http://www.thectsc.com/index.php?p=p...d=187&parent=7

and for the mechatronics sleeve

http://www.thectsc.com/index.php?p=p...&id=3&parent=7

if the bolts holding the pan look rusted you can pick up a few replacements in case any break on the way out

http://www.thectsc.com/index.php?p=p...id=28&parent=7
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      04-09-2012, 06:07 PM   #3
cdavi060
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Quote:
Originally Posted by Dracon View Post
The most likely cause of leaks on a 330i is the mechatronics sealing sleeve.

How many miles on the car? If you are nearing 100k, might as well do a coolant flush/fill, replace pan (filter is built into the pan, along was pan gasket) and replacement mechatronics sleeve while your at it (it's easier to replace the sleeve with the pan dropped anyway).

71,500 miles. The fluid was apparently flushed back in November, but not the filter or anything according to the last owner.

Could just the bad o-rings around the mechatronic sleeve make that much of a mess under there?
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      04-15-2012, 07:35 AM   #4
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Thumbs up

Followed this guide and replaced the fluid, pan with gasket, and mechatronic sleeve. Hopefully no more leak!

Link: http://www.e90post.com/forums/showthread.php?t=538296
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      04-18-2012, 04:08 PM   #5
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Quote:
Originally Posted by cdavi060 View Post
Followed this guide and replaced the fluid, pan with gasket, and mechatronic sleeve. Hopefully no more leak!

Link: http://www.e90post.com/forums/showthread.php?t=538296
Getting ready to do the same thing this weekend, how was it? Did you do it on the ground or use a lift? Any leaks after the fix? And what method did you use to refill the trans?
Thanks
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      04-18-2012, 04:14 PM   #6
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Quote:
Originally Posted by phasterthanyou View Post
Getting ready to do the same thing this weekend, how was it? Did you do it on the ground or use a lift? Any leaks after the fix? And what method did you use to refill the trans?
Thanks
Interested in knowing the outcome. I am at 88k and I dont think I have ever changed the transmission fluid or filter. No issues but I am courius about anything involving issues on 330s.
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      04-19-2012, 10:35 AM   #7
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Quote:
Originally Posted by phasterthanyou View Post
Getting ready to do the same thing this weekend, how was it? Did you do it on the ground or use a lift? Any leaks after the fix? And what method did you use to refill the trans?
Thanks
I do not have access to a full lift, but a jack and jackstands get the car in the air just fine. Although I have not gotten under the car to check for a wet pan, there have not been any spots left in the drive while parked. I used an oil pump to pump the transmission fluid from the bottles into the transmission (found any any local auto parts store).




Quote:
Originally Posted by GoRomeo View Post
Interested in knowing the outcome. I am at 88k and I dont think I have ever changed the transmission fluid or filter. No issues but I am courius about anything involving issues on 330s.
The issue is the leak, and hopefully not the repair of the leak
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      04-19-2012, 01:44 PM   #8
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Quote:
Originally Posted by cdavi060 View Post
I do not have access to a full lift, but a jack and jackstands get the car in the air just fine. Although I have not gotten under the car to check for a wet pan, there have not been any spots left in the drive while parked. I used an oil pump to pump the transmission fluid from the bottles into the transmission (found any any local auto parts store).






The issue is the leak, and hopefully not the repair of the leak
Cool, thanks for the reply. I'll be tackling it this weekend.
BTW, I'll have my helpers with me too, chocolate and yellow labs!
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      04-19-2012, 01:52 PM   #9
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Quote:
Originally Posted by phasterthanyou View Post
Cool, thanks for the reply. I'll be tackling it this weekend.
BTW, I'll have my helpers with me too, chocolate and yellow labs!
lol I love Labs post some pics of them as well, helpers deserve the credit too..lol
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      04-19-2012, 04:05 PM   #10
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Oldies, but goodies!
(lounging on the job... slackers)
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      04-19-2012, 04:10 PM   #11
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This is a known issue. I wish the DIY was available when I encountered my oil pan gasket leak. Brought my car to LTBMW and was fixed with no issues. It's sad that this is happening more and more to the E9X's. This is the only car that I've owned that has had this issue, and I've owned my share of cars (with tons of miles on them too).
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      04-19-2012, 04:21 PM   #12
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Quote:
Originally Posted by e92phreak View Post
This is a known issue. I wish the DIY was available when I encountered my oil pan gasket leak. Brought my car to LTBMW and was fixed with no issues. It's sad that this is happening more and more to the E9X's. This is the only car that I've owned that has had this issue, and I've owned my share of cars (with tons of miles on them too).
Re: Pan leak, probably due to the fact that the pans are plastic and may eventually warp or de-form over time.. Since the pan has the filter in it, as long as they last approx 50k miles I would imagine that the trans would require the service anyways.. How long ago did you have yours serviced?
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      04-19-2012, 04:24 PM   #13
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Quote:
Originally Posted by phasterthanyou View Post
Re: Pan leak, probably due to the fact that the pans are plastic and may eventually warp or de-form over time.. Since the pan has the filter in it, as long as they last approx 50k miles I would imagine that the trans would require the service anyways.. How long ago did you have yours serviced?
I only ask about how long ago becuase there are a few DYI's that I have seen over the last few weeks..
Either way, I'll do a brief overview myself with photos once completed.. Hopefully it will give some insight to others.
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      04-19-2012, 04:36 PM   #14
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Originally Posted by GoRomeo View Post
lol I love Labs post some pics of them as well, helpers deserve the credit too..lol
Riley
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      04-19-2012, 04:40 PM   #15
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Quote:
Originally Posted by phasterthanyou View Post
Re: Pan leak, probably due to the fact that the pans are plastic and may eventually warp or de-form over time.. Since the pan has the filter in it, as long as they last approx 50k miles I would imagine that the trans would require the service anyways.. How long ago did you have yours serviced?
I had a Feb-build 07 335i with about 80k miles on it when I had it done. It was probably a little over a year ago that I had it done. Pretty straight-forward and didn't have any issues after it was fixed.
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      04-19-2012, 04:44 PM   #16
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Quote:
Originally Posted by e92phreak View Post
I had a Feb-build 07 335i with about 80k miles on it when I had it done. It was probably a little over a year ago that I had it done. Pretty straight-forward and didn't have any issues after it was fixed.
80k with no leaks, sounds pretty good from what I've read. I guess one could say you lucked out since you didn't have any leaks until then.
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      04-19-2012, 05:24 PM   #17
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Originally Posted by cdavi060 View Post
Riley
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      04-20-2012, 02:55 PM   #18
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Weekend forecast, 80% chance of rain and lightning storms... Great weather for doing trans service in the driveway....
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      04-23-2012, 06:01 AM   #19
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So I started Friday night and had to quit due to heavy rain. Finished up Saturday morning. What a PIA! The new mechtronic sleeve took some persuasion to lock back in. Also, there's 24 pan bolts.. To be torqued to 10nm Need I say more? If I was able to get it up higher or use a lift, the whole process would not have been that bad. I have all the blocks and jack stands as I was paranoid of the car falling.. I had three fail-safes; jacks, jack stands, and wood blocks.
And don't worry, I leveled the car before refilling and checking the fluid level.
Here we are, hard at work!
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      04-23-2012, 06:11 AM   #20
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Quote:
Originally Posted by e92phreak View Post
I had a Feb-build 07 335i with about 80k miles on it when I had it done. It was probably a little over a year ago that I had it done. Pretty straight-forward and didn't have any issues after it was fixed.

what did that set you back?
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      04-23-2012, 06:29 AM   #21
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Originally Posted by hugus311 View Post
what did that set you back?
FYI- $271 delivered for pan/filter, pan gasket, Mechatronic Sleeve and o-rings, 6 liters of fluid, and a new fill plug. Save yourself close to a thousand bucks and do it yourself.
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      04-23-2012, 06:41 AM   #22
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Quote:
Originally Posted by phasterthanyou View Post
FYI- $271 delivered for pan/filter, pan gasket, Mechatronic Sleeve and o-rings, 6 liters of fluid, and a new fill plug. Save yourself close to a thousand bucks and do it yourself.
link?
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