Fuel leak in front of rear passenger tire. | FerrariChat

Fuel leak in front of rear passenger tire.

Discussion in 'Mondial' started by DocBasilone, May 3, 2021.

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  1. DocBasilone

    DocBasilone Karting

    Apr 15, 2020
    163
    NW PA
    Car ran great yesterday Strong odor of gas coming from garage after parking it. Fuel dripping from plate just in front of passenger rear wheel. Had tank repaired 1yr prior due to leak. Interesting was no pressure when opening gas’s cap about hour later.


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  2. FamilyCar

    FamilyCar Formula Junior
    Rossa Subscribed

    Sep 26, 2007
    655
    Seattle, Wa
    Full Name:
    Peter Goodall
    Isn't that about where the fuel filter is?
     
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  3. sidtx

    sidtx F1 Rookie
    Owner

    Feb 9, 2014
    4,454
    Frisco, Tx
    Full Name:
    Sid
    There's a fuel tank on each side of the car, with a hose/pipe connecting the 2.

    Also, on the passenger side are numerous fuel lines -- from the tank to various devices such as pump, filter, accumulator, and eventually the fuel distributor. Those lines on my car started weeping -- so we replace them all. They are fairly easy to get to, and you should swap them out asap.

    Sid
     
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  4. mike32

    mike32 F1 Veteran

    May 13, 2016
    5,828
    Isle of man- uk
    If you start removing any of the fittings by the pump or filter, be sure to mark the way they come out in case of any non return valves
     
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  5. theunissenguido

    theunissenguido Formula 3
    Owner Silver Subscribed

    Jan 21, 2004
    2,371
    Argent/Brasil
    Full Name:
    Guido
    I'm afraid that repair you did before is leaking again...
     
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  6. DocBasilone

    DocBasilone Karting

    Apr 15, 2020
    163
    NW PA
    Other side. But that thought crossed my mind


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  7. mike32

    mike32 F1 Veteran

    May 13, 2016
    5,828
    Isle of man- uk
    If i recall correctly the accumulator has a tell tail hole which leaks fuel if the diaphragm fails, that is behind the rear right wheel along with the filter and pump
     
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  8. spicedriver

    spicedriver F1 Rookie

    Feb 1, 2011
    3,859
    I believe that the EU models would just leak on the ground, but the US models have a return line that goes back to the fuel tank. So if the accumulator leaks on a US model, you wouldn't have any fuel leaking on the ground. That is the spot in front of the right rear tire though. Accumulator, and fuel filter, and several fuel line connections are located there. The fuel tanks are closer to the center of the car.
     
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  9. mike32

    mike32 F1 Veteran

    May 13, 2016
    5,828
    Isle of man- uk
    If the diaphragm is punctured it leaks out the hole, nothing to do with the return line. An accumulator is teed into a line to maintain a min pressure to assist hot starts.
     
  10. Mule

    Mule F1 Rookie
    Owner Rossa Subscribed

    Jun 25, 2003
    3,749
    Alaska
    Full Name:
    Mule
    My 328 did that a few years ago. It was the rubber hose under the tanks. The colder weather and driving made them seep, but they were original and about ready to burst. There are two hoses about 5 inches long at the bottom of each tank that connect them to the metal crossover pipe. They are weird metric, and I could not find the correct fuel rated one locally, so ended up with Ferrari parts. The center metal crossover pipe is not always centered, so one hose may be longer than the other or you can fudge the pipe to center.
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  11. spicedriver

    spicedriver F1 Rookie

    Feb 1, 2011
    3,859
    Top pic is for US Models. Reference #16 is the return line from the accumulator to the fuel tank. So if the accumulator fails, fuel doesn't just leak out of the hole. Lower pic is for EU Models.

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  12. mike32

    mike32 F1 Veteran

    May 13, 2016
    5,828
    Isle of man- uk
    Thats a new one on me
     
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  13. ronfrohock

    ronfrohock F1 Rookie
    Owner Rossa Subscribed

    Aug 16, 2004
    3,919
    MA
    Full Name:
    Ron Frohock
    For the life of me, I can’t find #16.
    I too have fuel dripping in front of my right side wheel and want to replace all hoses.
    Any further recommendations on which parts to buy and where to get them would be appreciated.
    Thanks


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  14. FamilyCar

    FamilyCar Formula Junior
    Rossa Subscribed

    Sep 26, 2007
    655
    Seattle, Wa
    Full Name:
    Peter Goodall
    Funny-we're on the same project schedule. I just ordered a new fuel filter, accumulator and check valve...

    I found part numbers in several old threads, and the best prices at AutoHausAZ. My real concern is the accumulator in this instance but I am doing all the lines around it as well.

    The parts numbers are:
    Accumulator Bosch 0 438 170 004 (-001?)
    Check Valve Bosch 1 587 010 532
    Filter Purolator F64857 (from Amazon)

    These are for an '87 3.2. I have not yet installed anything so I can't say for sure that they are correct.

    I replaced all of the "standard" fuel lines a few years ago. There are a number that you can't reach since they go behind a heat shield or on top of a fuel tanks, so they got skipped.

    I also got replacement fuel lines from the distributor to the injectors and for all the plumbing between the fuel pump and the distributor from Unobtanium Supply, but they haven't arrived yet. Unobtanium has several kits with different groupings of fuel lines and the correct fittings. I've had new injectors and seals sitting on a shelf for a few years, so I'm hoping soon that most all of my fuel side will be working better and safer.
     
  15. spicedriver

    spicedriver F1 Rookie

    Feb 1, 2011
    3,859
    #16 is on the right side of the accumulator in the pic. EU models wouldn't have this hose. If there is fuel in the hose, or leaking from that port, you've got a faulty accumulator.

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  16. DocBasilone

    DocBasilone Karting

    Apr 15, 2020
    163
    NW PA
    Update: Tank was found to have imploded due to faulty venting, excessive vacuum in tank cracked at seams!! This mondial tank venting system is ridiculous
    How come euro models vent to air but the T has this elaborite venting sys?? Last year someone on here said " I just drive with my gas cap loose" I did that for a while and had no issues but for some reason I tightened it up with a fill up and here we are.......
     
  17. theunissenguido

    theunissenguido Formula 3
    Owner Silver Subscribed

    Jan 21, 2004
    2,371
    Argent/Brasil
    Full Name:
    Guido
    So do I : " I just drive with my gas cap loose"....
     
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  18. afterburner

    afterburner F1 Rookie
    Silver Subscribed

    Jun 20, 2008
    3,197
    Hong Kong
    To my understanding the tanks are building up pressure, not depressurising. The check valve of the vent lets air in only, no gas out in case of a roll-over. When you open the gas cap, air should stream out, not in.
     
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  19. afterburner

    afterburner F1 Rookie
    Silver Subscribed

    Jun 20, 2008
    3,197
    Hong Kong
    Venting systems are neither ridiculous nor particular to the Mondial... they got more complex over time due to environmental concern related to unburned hydrocarbons released into the atmosphere during refuelling (nozzles with suction boots) and tank venting preventing HC emissions by recirculating them onto active charcoal canisters. Any newer car has a more complex tank venting arrangement than any older one due to legal requirements - which are also related to the country of registration. The US had more stringent laws earlier than Europe.
     

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