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BMW 3-Series (E90 E92) Forum
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Engine Mount Vacuum Lines
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03-09-2017, 04:13 PM | #1 |
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Engine Mount Vacuum Lines
Has anyone replaced theirs? Can they point me to a good DIY of how to do it. The diagrams on RealOEM only do me so much good.
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03-10-2017, 03:39 AM | #2 | |
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Remove the undertray. You have to remove the underbrace #5 in this diagram: Then you have to support the engine. You will be removing one side at a time (do one, finish, then do another). Remove one at a time these brackets: #12, then #13 or vice versa. You will have to unbolt the two long bolts attached to the engine mount on each side. Bolts are #7 in the diagram. Brackets themselves are held with bolts #14 to the front subframe, 5 on each side. Make sure you note that vacuum lines are routed through the two brackets mentioned above. When replacing the lines and reinstalling the brackets, you need to route the lines through the brackets, connect to the engine mount and then reinstall the brackets and engine mount bolts. Test your engine mounts while you are in there. They have to hold vacuum. This is a bit of work, but needed to carefully remove the old vacuum lines off the little #7 90degree connectors attached into the engine mounts. I have also found that you do not need to replace the line past the T-connector #6, as the line #4 going to the EL valve is quite good and seems to live longer. On the driver's side, I found that the vacuum line was pinched between the bracket and the underbrace. I have dremeled a bit more space. Your situation may be different. |
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03-10-2017, 10:14 AM | #3 | |
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03-10-2017, 01:51 PM | #4 | |
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Deleted, ATM I/C and tuned by B.R.R.
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kydiesel35167.50 |
03-10-2017, 02:14 PM | #5 |
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Big thank you to Yozh
![]() I agree with posts above and makes me wish I lived closer to such a wealth of knowledge! A lift and a garage and you can have "Yozh's 335D speedshop" ![]() For anyone new to forum, there is a little "appreciate" button under a person's post, where you can sort of recognize their contributions to the forum. Well deserved. Last edited by dmanb2b; 03-13-2017 at 08:54 AM.. |
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03-10-2017, 02:19 PM | #6 |
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We have TDIWyse who is the guinea pig for basically every power modification you can put on our cars and still have a daily driver. Yozh is here for when something inevitably breaks. Between the two of them, there is a wealth of knowledge.
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03-12-2017, 08:02 PM | #7 |
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03-13-2017, 03:20 AM | #8 |
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Thanks guys. I would be happy to share a beer with anyone that comes around our shores. Cheers.
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Chief Orman711.00 |
03-24-2017, 03:13 PM | #10 |
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05-14-2017, 01:49 PM | #11 |
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Had a chance to take apart an old engine mount that I wanted to recycle. Mainly was trying to figure out why it was not holding vacuum. Here are a few photos. About 150ml/5flOz of fluid came out.
And here is a description from an older BMW document, but the concept is the same |
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10-23-2022, 04:44 PM | #15 |
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It is the BMW common 3.5 mm vacuum hose
https://www.tunemyeuro.com/cloth-cov...i-bmw-engines/ |
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