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03-14-2015, 10:21 PM | #23 |
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The issue of the cause of leakage is simple. All the bolts that retain the pan and covers are aluminum. Aluminum bolts will stretch much easier over time than steel or stainless. Because the exhaust runs so closely to the actual pans, the heat transfers into the casing/pans and expands the parts. With this expansion, it stretches the aluminum bolts, and they become loose and lose their torque. Secondly, the casings twist a bit under hard acceleration, causing pressure again to those same stupid aluminum bolts, causing them to stretch. Two ways of fixing these issues. First, replace all the bolts with stainless fasteners and blue loc-tite them in. Second, increase the box rigidity by replacing the shitty plastic trans pan with a SSP billet pan. Not only will it add fluid, increase cooling ability, and look awesome, but it will also reduce the amount of flex through the transmission.
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03-15-2015, 06:27 AM | #24 | |
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Does anyone sell a stainless bolt kit for the lower pan and side cover? Also, do you know if the transmission has to be removed to replace the side cover gasket? I have been led to understand that the bolts are stretch bolts and have to be replaced - i.e., one time use. What would be the torque spec for stainless fasteners as they would not be torque to yield? I also found this pan, which would be a third alternative (to the Gintani and SSP pans): http://www.ebay.com/itm/BMW-E90-E92-...805825&vxp=mtr I actually think the finish on the Taiwanese eBay piece is a bit nicer although it does not have the baffles that the SSP pan has. Last edited by rantarM3; 03-15-2015 at 11:08 AM.. |
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03-15-2015, 10:00 AM | #25 | ||
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03-19-2015, 08:55 PM | #26 |
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We only use stainless fasteners for the pan. We only torque them to factory torque specifications. As you know they are still being torqued into an aluminum surface.
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03-27-2015, 07:48 PM | #27 |
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DCT Small Leak
My car is 2011 with only approx 14,000 miles. I took the car for my final warranty service and asked them to check for leaks in the DCT and I had the same problem. I am the original owner. Car is well maintained - like new. Dealer will take care of the problem, but I think owners need to check this regularly. I think this is a real problem with these cars with these transmission. BMW should look to cover owners for this problem beyond 4 years similar to the the high pressure fuel pump issues they had with their turbo charged engines. My concern will it happen again.
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03-27-2015, 08:52 PM | #28 |
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I think this is probably a recurring problem. I had the dealership replace the side pan a month ago. Today i checked again while doing some exhaust work. Lo and behold, the bottom pan is also leaking. From what I can tell, the oil seeps through the bottom pan screws holes. I think the screws loosen themselves overtime. I don't want to try to torque the screws because of aluminum material. Going to have to take it in again.
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03-27-2015, 09:26 PM | #29 |
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I contacted BMW customer service, spoke with the dealer, and took the car back in. It's not yet fixed and will have to drop it off again on Monday. I was told by the dealer that they are waiting for BMW's response as to whether they will authorize the repair under warranty. This is turning into a ridiculous situation for something that thould be covered (and has been for others) without question or outdrawn review. This is supposed to be a luxury brand? Let's see what BMW comes back with on Monday.
I fully expect that the leak will return and If I keep the car long term, which has been the plan, I'll go with stainless fasteners and aftermarket lower pan. |
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03-28-2015, 12:10 AM | #30 | |
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03-28-2015, 05:33 PM | #31 |
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I purchased my 2012 e92 2 weeks ago, few days ago lifted the car and checked for leaks, exactly the same problem. Went to the closest dealership, they told me the same resiculous thing, "it depends how big is the sippage" what? $50+k with oil leaks on 21k miles, thats absurd. Made an apointment with a different dealership, will see whats gonna happen.
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03-28-2015, 06:59 PM | #32 |
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MY car is currently at the dealer to repair this leak as well as a few other things. Just an FYI, dealer price to fix this is ~$1086. I have a third party warranty through MPP so theyre covering it (again...).
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03-29-2015, 03:38 AM | #33 |
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I am lucky the car is still under warranty! What do you mean again? How often does it happen?
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03-29-2015, 12:51 PM | #34 | |||
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That's exacly why I started this thread. The replacement parts are the same so the leak will almost certainly reappear, every couple of years it looks like. |
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03-31-2015, 10:59 PM | #38 | |
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My dealer is great so not worried as they will go to war with BMW. OF COURSE, they know if their hands get tied on this issue, I will be bringing a lawyer in before you can say BMW. I'm still under original warranty and own her outright. Cheers, e46e92
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04-01-2015, 08:15 AM | #39 |
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Changes in behavor sound like it gone (too) if it is the oil leak mate? 9.5 liters in total so Id assume a good couple of liters still should be ok.
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04-01-2015, 09:07 AM | #40 | |
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Am subscribing as this is a real issue and spread across a bunch of cars. So far to date issues: 1) Steering rack to go (happening to others, I am getting a new rack under CPO as we speak) 2) DCT leak (no real fix) 3) Power steering leak on track (fixed with a breather catch bottle) 4) Rod bearings (am taking precautionary fix before CPO expires next month). 5) Engine mounts fatigued (understandable given the stress). Otherwise the car has been fairly stout given the abuse on track. Cheers, Lutfy |
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04-01-2015, 10:45 AM | #41 | |
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04-02-2015, 08:05 AM | #42 | ||
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What everyone forgets to realize is this is an engine that revs to 8400 and produces 414, N/A and is designed to last as a daily. Almost every other car even close to its capabilities simply are not designed for that type of use. All these issues could be rectified with more heavily engineered parts, but everyone already bitches now at the price tag....BMW is never given credit and all people generally do is complain. If I was BMW, I would ignore us. Cheers, e46e92
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04-02-2015, 05:09 PM | #43 | |
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The rough shifting is not something the tech could tell, but as he said, "you know your car, so not shocked if there is a slight change you would notice". So good chance it's just that the DCT is sensitive to oil level, even a small drop and that its just a leaky gasket and stretched screws and not a full unit replacement. Cheers, e46e92
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04-02-2015, 07:27 PM | #44 | |
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