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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 10-15-2012, 03:48 PM   #1
m3e46freak
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DIY- Fuel pump replacement

So, some of you may know the issue that I had whilst at the track. Apparently it was my fuel pump because after codes were cleared and I replaced the pump it was smooth as eggs, but I am doing fuel pressure reg and coolant temp sensor also.

ANYWAYS:
Tools: Screwdriver-flat head/hammer/10mm socket/ratchet to fit 10mm/30 min
Difficulty level: 2/10


Step one:
Take out the fuel delivery fuse and try to start car three times until it does not get fuel to the system. Undo negative terminal on battery in rear
Take out back seat. Get in on driver side. Firmly grasp rear *giggity* back seat and firmly pull upwards and you'll hear the pop

Step two: Grab your vacuum and vacuum that metal area all around the pump which is on the RIGHT-PASSENGER side. DO NOT let dust/grim/ get in that tank.

Step three: Once area is vacuumed well, take your 10mm socket and ratchet and lift up lightly on the rubber that surrounds the wiring and cable that comes from the pump itself and get to work


--------------------------------------------------------------------------Easy part is done.

Step four: Once that metal layer is off with the four 10 mm nuts, go ahead and vacuum again in that next smaller area






Step five: After vacuuming, grab your flat head screw driver and hammer and light tap COUNTER clockwise on the notches on the metal cap that holds down the actual pump. Choose different points and angles so its done evenly.


Step six: After that is done, vacuum area again. Now you should see the hose coming from the pump area, lightly lift it upwards and you can grab the two notches on the tube and squeeze them both and it will pop off. HAVE TOWELS HANDY.



Step seven: Hose is off and now your ready to lightly lift up on the small connector on top of the pump. Lightly, pull up and back and it will slide easily, here is a photo to show the notches/grooves it slides on. Remember to line the notches up with the grooves in the connector when putting it back on




Step eight: Connector is off/hose is off/you have towels..
Lightly pull up on that plastic attach point being careful not to pull TO HARD because your level is attached and could break if you pull to hard.

Step nine: Almost there, hang tight, once pump is loose, wiggle it out and upward being careful of the hoses and level


Step ten: notice the color differences between your old and new and then line up the bottom of your new one with the slot that it will go in inside the tank




ALSO I got curious and took open the other side of the tank, I believe it is the sump jet device that cycles fuel from the left side to the right side, ensure that it is not kinked! Final remarks, when re-installing items, put level in and seat pump properly in its cage down bottom in that small section, then get the pump almost down and THEN wiggle the rubber seal onto the tank top/housing it is easier that way... PUSH the pump then down and seat it on that rubber housing. Line up the space/notch here so it slides down right then place the metal ring on and tighten!
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Last edited by m3e46freak; 10-15-2012 at 03:50 PM.
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Old 10-16-2012, 01:38 PM   #2
NC330ci
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thx

thanks for the write up, gonna tackle this soon. Recommended replacing any other components? I've seen some mention replacing an O-ring?
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Old 10-16-2012, 04:23 PM   #3
m3e46freak
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o ring yes and fuel filter.
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Old 10-16-2012, 09:30 PM   #4
Whammy
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I also did this today, but used a different set of instructions.

For step five, do not use a screwdriver. A better choice would be a socket on the end of a hand wrench. It will go MUCH faster as there is more surface in contact.
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Old 10-17-2012, 06:36 AM   #5
m3e46freak
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MY fault fellas, I did NOT use a screw driver, I used a screw driver type tool that you have to actually place the little "bit" inside of it... but I just used the open end without a bit, so it was wider and stronger.
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Old 04-17-2016, 05:32 PM   #6
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Waaaa. The photos are gone....
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Old 04-17-2016, 06:12 PM   #7
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from 4 years ago...
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Old 04-17-2016, 10:40 PM   #8
cwarel
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I put walbro 255 LH in my bmw , runs like a champ , cuz the 2 oem pumps i bought burned out in like 3 days , thats was ebay dissapointment)))
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