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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-13-2013, 10:52 PM   #21
artofbmw
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Join Date: May 2013
Location: fort lauderdale florida
Posts: 3
My Ride: 2004 bmw 325xi
I filled my gas to full for the first time since getting the car a few months ago. Anyway I experience the same issue. Gas leaking about an ounce a second. I was in shock. I pulled the car to where the vacuum station is leaked for another 4 minutes.luckily my machanic was 2 shops over. He waked over and we both drove back. He calls and says yeah 450 dollar fix. I tell him u guys were the ones who initially installed the new fuel pump which I paid 450 for. I had to even come back because of a gas smell. Anyway please I need to know why it leaks and from where. I know u say from the fuel pump my question is how does it leak from the drop and go all the way under the car? Why doesn't it fill up the back of the car like s dog taking a leak. How does it go down. Sorry I am just very curious.
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Old 05-13-2013, 11:17 PM   #22
Stinger9
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Join Date: Sep 2011
Location: New York
Posts: 7,782
My Ride: '04 330Ci
First there is your rear seat, and then under that is the sheet metal that forms the body of the car. So basically you are almost sitting on the shell of your car in the rear seat. Explore around the cut-aways on www.realoem.com to see what you need to know.
Then the gas tank is mounted externally right under the sheet metal. So it is on the outside of your car. Any leaks from the tank therefore flow around the top of the tank and drip down onto the ground under the tank.
I hypothesize that your mechanic did not know how to install the gasket as spelled out in post #14 by me. So you've got an inept mechanic who is skinning you with mucho $ to correct his stupid mistake.
If anything other than an incorrectly installed gasket is responsible for your leak, the fix would be much more expensive than the $450. Unless it's something very rare.
You need to get a dialog with your mechanic to have him explain exactly what is causing the leak now. Come back here and tell us for the ultimate smell test.

Last edited by Stinger9; 05-13-2013 at 11:18 PM.
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Old 05-13-2013, 11:21 PM   #23
billj3cub
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Join Date: Nov 2011
Location: Beaverton, Oregon
Posts: 4
My Ride: '02 M3
Look at my previous post right before yours for an explanation of, and solution to, this problem. Guaranteed your mechanic installed the sealing ring wrong. It should take him 30 minutes to fix, start to finish and should not cost you anything. Print out my post and give it to him then he can thank you for the help and apologize for the inconvenience he caused you while fixing it for free under warranty.

The gas tank is outside the car. The gas has no way to get inside. There is an inspection cover under the rear seat that gives access to the part of the tank where the fuel pump may be removed without having to drop the tank.
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