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308 G/box/Engine pan

Discussion in 'Technical Q&A' started by rizzo308, Mar 30, 2010.

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  1. rizzo308

    rizzo308 F1 Rookie
    BANNED Silver Subscribed

    Sep 12, 2004
    2,784
    Perth, Australia
    Full Name:
    riggio
    #1 rizzo308, Mar 30, 2010
    So my g/b pan is leaking drops of oil i have had this problem since i rebuilt the donk 1 yr ago. I have replaced the gasket twice already. I plan to replace the gasket next couple of weeks, if it leaks this time i will learn to live with it. I know these car are 25+ yrs old but what works or has worked for you.
    Cheers
     
  2. Steve King

    Steve King F1 Rookie

    Feb 15, 2001
    4,367
    NY
    #2 Steve King, Mar 30, 2010
    Do you know where the leak is coming from. Is it around the studs or around the whole gasket. Also I assume there are no cracks in the pan. If you are going to remove the pan again then I would check it for flatness to make sure it is not distorted. Worse case would be to double gasket it. Please let us know what you find.
     
  3. rizzo308

    rizzo308 F1 Rookie
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    Sep 12, 2004
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    Perth, Australia
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    riggio
    #3 rizzo308, Mar 30, 2010
    Hard to tell if it's the gasket or the bolts, i don't think the bolts go through into the g/b casing do they.
     
  4. Steve King

    Steve King F1 Rookie

    Feb 15, 2001
    4,367
    NY
    #4 Steve King, Mar 30, 2010
    Yes I believe some of them do. When you look at the studs do you see a film of oil on the threads. That is usually the sign that they are weaping oil through the nuts. I replaced all of my nuts with SS nylok stop nuts. It fixed the weaping issue. You can also get washer with a rubber seal that does the same thing but the stop nuts also don't vibrate loose. May want to try that first. Good luck
     
  5. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
    Full Name:
    Tom O'Shea
    #5 tomoshea, Mar 31, 2010
    I use a very thin bead of loctite gasket seal (blue) on the bottom pan and on top of the gasket. Circling each of the studs.

    This has eliminated all the leaks from my pan completely. It does make removing the pan/ gasket slightly more messy, but I think it is worth it.
     
  6. Pizzaman Chris

    Pizzaman Chris F1 Rookie

    Mar 13, 2005
    3,919
    New Hampshire
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    Pizzaman Chris
    #6 Pizzaman Chris, Mar 31, 2010
    Still leaking oil??

    I don't know man, I think it's time to sell the old girl. ;)


    Cheers,
    Roo the Pizzaman
     
  7. speedmoore

    speedmoore Formula 3
    BANNED Professional Ferrari Technician

    Apr 15, 2003
    1,541
    Austin, Texas
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    D Moore
    #7 speedmoore, Apr 2, 2010
    very common....nylocs won't keep it from leaking over time. Light film of Dow corning 730 on the gasket(s-both g/b & eng) as well as on the threads of the 6mm studs, it will never leak again.
     
  8. don_xvi

    don_xvi F1 Rookie

    Nov 1, 2003
    2,934
    Outside Detroit
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    Don the 16th
    #8 don_xvi, Apr 2, 2010
    Wow, that stuff is spendy, $75+ for a tube.
    Anything cheaper that can be recommended?
     
  9. ramosel

    ramosel Formula 3

    Sep 11, 2004
    1,237
    Meadow Vista, CA
    Full Name:
    R Moseley
    #9 ramosel, Apr 2, 2010
    The Dow 730 is great stuff but I've also had very good results with the Ford Silicone they use for sealing the mating surface on the diesel oil pans. Any Ford dealer will have it in small caulking tubes for about $24. CLEAN all your surfaces, light smear on both sides of the gasket.

    Rick
     
  10. steven_ew

    steven_ew Karting

    Apr 3, 2009
    107
    #10 steven_ew, Apr 6, 2010
    If you have already re-gasketed twice with no luck it may be the leak is elsewhere - I had exactly the same experience, but found that actually, oil was leaking from the crankshaft oil seal behind the torsional vibration damper and dripping down the the lowest point, ie the heads of the gearbox cover studs. Replacing the oil seal fixed that, but is no small task.
     

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