M42club.com - Home of the BMW E30/E36 318i/iS
DISCUSSION => Engine + Driveline => Topic started by: a930rocket on March 16, 2011, 10:39:07 AM
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Went to change the fuel filter today and saw that the rubber fuel lines are dry rotted. Not good for driving, so I want to replace them. In the back, I want to say it's 8x13mm, but how many LF do I need to replace all the lines in back?
Fuel pump to fuel filter, return lines, etc.?
What about at the engine?
Thanks,
Jim
BTW: What size is the allen bolt on the diff? 14mm? I'llchange the rear end dope while I'm under there.
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Went and bought 12' of 8mm fuel line (probably too much, but better to have enough than, not enough when you need it). Looks like the front has been replaced recently, so I'll leave that alone for now.
Now I just need to figure out where it goes and how to access it. I want to say under the rear seat or trunk?
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Pump is under the back seat, fairly easy to access. IIRC, lines might be a bit tricky to sneak in/out for replacement. I'm having trouble remembering exactly how they enter the tank area though.
12 feet should be enough, but it's readily available if it's not. I need to replace my lines as well, so please share any tricks you pick up along the way!
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No need to pull the tank and if you do, you'll need to drop the rear crossmember. Unless your going to do bushings, etc., I'd leave it.
The fuel system needs to bled down over night/time, but if it doesn't, you can bleed it by loosening a fuel line at the fuel filter. Be careful as it can spray out and on you (like it did me :( )
The fuel pump location is under the passenger side rear seat as mentioned. You access it by pushing in the bottom on both sides and lifting up, then pull the rear carpet forward and the sound pad under the seat to the back. There's a oval access cover held on with 4 screws on the passenger side. On the driver side, is a round access cover held on by 4 screws. The round hole acts as a half way point and allows you to push/pull the hose to the fuel pump on the driver side and down to the fuel pump on the driver side. I would get 8-10 new small hose clamps, as the old ones might strip, as some of mine did.
There's a 6" - 8" piece you can replace under the oval cover. The other piece is 3' - 4' long and goes from the pump to the filter. There's another two shorter pieces 6" -8" at the filter. One is a snap to replace but the other goes to a hard line up near the top of the tank. That one was a PITA to loosen the clamp and pull off, but I was able to get to it by spinning it to the point I could get a small 1/4 ratchet with a 6" wobble end extension and a 5 or 6mm socket on it. There's no way to lower the fuel tank to give enough room, as far as I could tell.
I'll take some pix tomorrow, as I need to button it up tomorrow.
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Pix added.
Hopefully I've labled them right...
(http://i1143.photobucket.com/albums/n632/a930rocket/FuelFilterLines4640x480.jpg)
(http://i1143.photobucket.com/albums/n632/a930rocket/FuelFilterLines5640x480.jpg)
(http://i1143.photobucket.com/albums/n632/a930rocket/FuelFilterLines6640x480.jpg)
(http://i1143.photobucket.com/albums/n632/a930rocket/FuelFilterLines640x480.jpg)
(http://i1143.photobucket.com/albums/n632/a930rocket/FuelFilterLines2640x480.jpg)
(http://i1143.photobucket.com/albums/n632/a930rocket/FuelFilterLines3640x480.jpg)