Split fuel tanks | FerrariChat

Split fuel tanks

Discussion in 'Mondial' started by Antwan, Feb 15, 2015.

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  1. Antwan

    Antwan Karting

    Nov 22, 2013
    188
    Manchester UK
    #1 Antwan, Feb 15, 2015
    Last edited by a moderator: Sep 7, 2017
    Having had fuel smells when hard cornering, I have done some investigation whilst my engine has been out. I have found that both tanks have split along the top weld as shown in the picture. I have stripped the coating of the tanks and found some pitting due to corrosion, but this was not excessive. It seems that the splits were probably caused by cyclic heating and cooling from the manifold.

    Each split was about 6" long.
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  2. billh1963

    billh1963 Formula Junior
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    Apr 28, 2004
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    Bill H
    Wow! That is a scary find. I wonder how common this issue is for the Mondial?
     
  3. Antwan

    Antwan Karting

    Nov 22, 2013
    188
    Manchester UK
    The fact both had gone and by the same amount, I guess common, obviously dependent on age of car. Mine is an 82
     
  4. ronfrohock

    ronfrohock F1 Rookie
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    Aug 16, 2004
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    Thanks for posting this.....
     
  5. Wade

    Wade Three Time F1 World Champ
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    Mar 31, 2006
    32,793
    East Central, FL
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    Wade O.
    Good catch, and at least these tanks are repairable (for the most part).

    I wonder if I can assume correctly that you never had that whooshing of air/vapor when removing the gas cap.
     
  6. afterburner

    afterburner F1 Rookie
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    Jun 20, 2008
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    Happy you found this before the fire brigade... thanks for posting.
    Has your tank still built up pressure when driving with an almost empty tank?
    Did you get the air escaping from the filler neck when undoing the gas cap before filling up?
     
  7. MvT

    MvT F1 Rookie

    May 25, 2013
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    Tijn
    I guess when one has replaced all the fuel lines and hoses this will be the last place to look :) good catch Antwan!
     
  8. afterburner

    afterburner F1 Rookie
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    #8 afterburner, Feb 16, 2015
    Last edited by a moderator: Sep 7, 2017
    I posted this before, but here again. Check the pitting, which was hiden below the silver rubbery coating on my car's fuel filler neck: Some of the corrosion areas were actual holes, others just pits.
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  9. 308mon

    308mon Karting

    Oct 5, 2014
    169
    UK
    Pressure testing the fuel tank and pipes can help keep an eye on the state of the fuel system (along with use of a MK1 Sniffer - otherwise known as your nose) plus help one to sleep easier at night. Just remember if pressure testing to keep the pressure low (under atmospheric and around 10 PSI is ideal).
     
  10. Antwan

    Antwan Karting

    Nov 22, 2013
    188
    Manchester UK
    The tanks never built up any pressure that was evident when removing the filler.

    I have also noted that there is a blank on the top of the rh tank which was obviously a nozzle at some point. these are the connections left, I don't have a vapour recovery filter thingy

    Centre link pipe
    Pump feed and return
    Fill neck
    1 high level vent on each tank returning to fill nozzle.

    This sound right?
     
  11. PATLEW

    PATLEW Formula 3

    Dec 3, 2007
    1,004
    Marvin /Waxhaw
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    Patrick Lewandowski
    I think it is a common issue my 89 Mondial had the same problem but progressed to a full on leak when filled beyond 1/2 full.


     
  12. afterburner

    afterburner F1 Rookie
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    Yes, my Euro QV is the same. That corresponds to the parts manual as well.
     
  13. Antwan

    Antwan Karting

    Nov 22, 2013
    188
    Manchester UK
    Great thanks guys
     
  14. bartzagato

    bartzagato Formula Junior

    Aug 7, 2010
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    Belgium
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    Bart
    #14 bartzagato, Mar 29, 2016
    Last edited by a moderator: Sep 7, 2017
    I think I got a same issue on my '82 QV.

    I filled up the Mondi this weekend in the Ardennes. When we were discussing where to go next alongside the car, a raw fuel smell was welling up. When I looked under the car there was a puddle of fuel on the floor at the gas station.

    We pushed the car away from the puddle, but fuel was still dripping from a hole in the middle of the tank.

    We drove right away back to the weekend house we rented, where we left the car for the rest of the day.
    Around the evening, the dripping stopped. Since the car was parked uphill, I turned her around so the dripping started again as soon she was parked downhill.

    Monday morning I pumped up the tire with a screw in it and drove the 180kms back home without an issue.

    2 more things on my list: repair/change leaky right fuel tank and find a decent solution for a spare tire. I didn't want to mount the original spare. Any suggestions? I think I will search for a Volvo alloy with tire.
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  15. bartzagato

    bartzagato Formula Junior

    Aug 7, 2010
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    I tried the search function on gas tank removal, but it seems that it isn't documented here yet.

    Someone?
     
  16. Alden

    Alden F1 Rookie
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    Apr 25, 2010
    3,390
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    Which Volvo compact spare fits our cars? I would like one too, more room in the front boot that way and my original, like new spare could stay at home.
    Alden
     
  17. bartzagato

    bartzagato Formula Junior

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    I'll figure it out and come back on it.
     
  18. FCnew

    FCnew Formula Junior

    May 5, 2015
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    this was discussed before... but hell do I remember which wheel? sorry I don't remember. I can't even find the thread. But it is there somewhere.
     
  19. petrolheadjeff

    petrolheadjeff Formula Junior

    Apr 16, 2015
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    Jeff
    Bart, that's a good call on the spare tyre. A space saver wheel will suffice to get you home and it doesn't need to weigh 100kg lol. When you find a suitable tyre perhaps you can update us ... and I'll be off to the breakers yard ...

    Jeff
     
  20. MvT

    MvT F1 Rookie

    May 25, 2013
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    V50, since I owned one and tried, now my sister's. Center hole has a different size, but that does not matter.. as long as it centres up correctly using the bolts :)

    V50 is also (euro) Ford Mondeo rimms
     
  21. MvT

    MvT F1 Rookie

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    None that I recall other then this post, which I got reminded the moment when it got up in the list again :) Nasty issue.

    It's more work then replacing the center pipes. Since you need to take away the two alloy coolant pipes taht are connected to the centerpipes. I hope you do not have to take away the shift shaft, but it is aweful tight in that place.
     
  22. Rapalyea

    Rapalyea Formula 3

    Jun 18, 2013
    1,511
    Georgia Mountains US
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    David Rapalyea alias
    #22 Rapalyea, Mar 29, 2016
    Last edited by a moderator: Sep 7, 2017
    Very perplexing! Are you going to replace the tanks or otherwise have them mended? They look like aluminum! Here in the North Georgia Mountains we keep two things on hand which can fix many things. Gorilla Duct Tape, and JB Weld epoxy. I can vouch for the JB Weld.

    I once boxed in the rear suspension pieces on my 1991 Lincoln Mark VII with simple small black short water pipes embedded top and bottom within the stamped mild steel 'U" trailing arm suspension with epoxy. That car now has 190,000 miles and is, shall we say, very stable at high speeds.

    I bought a 1988 replacement for the 1991 because it was in near show room condition. The initial positive displacement supercharger instillation (the third one I have had done on a Ford 5.0) failed. So my buddy and I replaced the heads with high compression high flow TricFlow heads and now it is good for 6,000 rpms. Got us to thinking about that Supercharger again.

    We have plans and strategies this time! Perhaps a refined 400 hp? We do not know how it might work out but it will be fun finding out. And I just might box in those trailing arms once again. I do, after all, live in the mountains!
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