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Thread: M30 Engine Fuel Leaking

  1. #1
    Join Date
    Mar 2007
    Location
    San Francisco
    Posts
    43

    Default M30 Engine Fuel Leaking

    Anyone experienced this really cool intoxicating smell of gasoline?? The past M30 as well as my current one seems to have this problem. it's the tiny rubber fuel hose towards the firewall, if you're standing on the driver's side looking into the engine bay. it's about an inch long, and for whatever reason it just likes to leak. i want to change it myself but i'm afraid of gas spewing out everywhere and creating a big giant mess, which in hindsight is no less dangerous than a pool of gas next to my hot engine block..


    anyone have any advice?
    _______________________________
    1990 535iA Glacier Blue Metallic 114k

  2. #2
    Join Date
    Dec 2003
    Posts
    1,640

    Default

    yeah. you need to fix it.

    you'll need to loosen the hard pipe connection under the intake manifold. 10mm bolt. undo it then undo the clamps on that 1 inch line. replace it. be sure to use fuel injection clamps and pressure rated (fuel injection) hose. don't use regular low pressure fuel line.

    if you leave the car parked for 3 or 4 hours before you do all this, you'll have minimal residual pressure in the fuel lines. it will still bleed out a fair amount of fuel (< 1 cup) so have some rags handy.

    jeff
    Bellevue WA
    90 535iM - not much stock remains. 3.7 liters, ported head, cammed, 3.73 diffy, M5 brakes, MAFed, yadda yadda yadda
    86 Porsche 951 - Track Toy

  3. #3
    Join Date
    Mar 2004
    Posts
    157

    Default

    or discontect the fuel pump with the engine idling to remove pressure from the system

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