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Oil sump cover

Discussion in '308/328' started by F308fan, Jun 24, 2022.

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  1. F308fan

    F308fan Karting

    May 7, 2017
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    Tony Pacini
    #1 F308fan, Jun 24, 2022
    Seeking used engine oil sump cover for 1981 308 GTSi (US version) in good condition. Mine was repaired before I got the car and is now leaking. I may have to try to repair it (again) as a last resort, but if I can round up a decent used one I’d prefer to go that route instead.
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  2. 4right

    4right F1 Rookie
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    #2 4right, Jun 24, 2022
    Is the leak coming from the cover or the drain?
     
  3. ferrariowner

    ferrariowner Formula 3

    Feb 21, 2014
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    Ron
    #3 ferrariowner, Jun 24, 2022
    It looks like they glued it??
    I suspect a competent welder could fix it well enough not to leak. Maybe retap the drain if needed.
     
  4. F308fan

    F308fan Karting

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    #4 F308fan, Jun 24, 2022
    The drop was hanging from the drain plug, so the cover may be cracked at the hole. Yes, it was repaired with some type of hard sealer. Not welded.
     
  5. Vonbarron

    Vonbarron Formula 3
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    #5 Vonbarron, Jun 24, 2022
    I have an 83’ one
     
  6. F308fan

    F308fan Karting

    May 7, 2017
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    Tony Pacini
    #6 F308fan, Jun 24, 2022
    That’s my backup plan if I can’t find another cover; scrape the repair material off and have the cover welded and re-tapped.
     
  7. F308fan

    F308fan Karting

    May 7, 2017
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    Tony Pacini
    #7 F308fan, Jun 24, 2022
    It appears to be a different part number for the QV engine sump cover, not sure what the difference is or if it could be made to fit.
     
  8. Brian Harper

    Brian Harper F1 Rookie
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    #8 Brian Harper, Jun 24, 2022
    I know your pan is a mess, but be aware that every oil leak on the engine works its way down to the oil pan to look like a pan leak even when it's not. You might want to be sure that it's really the pan that's leaking, but I admit that I'd be looking for a replacement just based on how it looks even if it's solid.
     
  9. F308fan

    F308fan Karting

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    Tony Pacini
    #9 F308fan, Jun 24, 2022
    I agree with you on all counts. I drove it, put it in the air, sprayed it off, and the drain plug was the first area to show signs of leakage again.
     
  10. miked

    miked Formula Junior

    Feb 7, 2001
    898
    Cincinnati, Ohio
    #10 miked, Jun 25, 2022
    That's a "repair" ????
    I'd call it well past a hack, more like an abuse.
    If it were mine I would media blast the "sealer" off and see whats underneath. Depending on your skills and tools it may be feasible to fix if you can't find a replacement at a reasonable cost. A good welder should be able to weld up any cracks. A new oversize drain plug can be fitted after a drill and tap.
     
  11. F308fan

    F308fan Karting

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    #11 F308fan, Oct 16, 2022
    Update: it wasn’t a cracked sump plate after all. Despite how ugly that repair is, that’s not where it was leaking. I drained the oil, cleaned and inspected the threaded area in the sump plate, and could find nothing wrong. I couldn’t feel or see a crack nor was the threaded insert out of place. I’d read somewhere on this forum that the standard-type copper drain plug gasket often requires over-tightening to seal (if at all), and I’d been using copper. I installed an aluminum drain plug gasket and now the leak is gone.
     
  12. pappy.72

    pappy.72 Formula Junior

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    #12 pappy.72, Oct 16, 2022
    Remember, crush washers are supposed to be a one time use item. When it comes time to change the aluminum one replace it and don’t reuse it. I might be stating the obvious but some might not know.
     
  13. F308fan

    F308fan Karting

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    #13 F308fan, Oct 16, 2022
    Dave,

    It was a new copper crush washer and it leaked anyway. Maybe it was too hard, maybe the top and bottom weren’t parallel enough, who knows? I’ve ordered more aluminum ones and I’ll use a new one at every change.
     
  14. conan

    conan Formula Junior

    Nov 13, 2011
    389
    #14 conan, Oct 17, 2022
    I noticed an earlier repair done to my 328 oil drain plug. Unfortunately, the thread was not straight 90 degrees to the seat of the plug. It can be checked by some marker pen and tightening slitghtly. Then have a look where the seating is uneven. Sand down the high spots until flat.

    The other problem can be the crush washer, but you can easily anneal it with a torch and polish the surfaces of the washer until flat. Sandpaper in circular motion only.

    No need to overtighten anything. It will seal if the seating is right.


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  15. Ehamilton

    Ehamilton F1 Rookie
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    #15 Ehamilton, Oct 17, 2022
    I tracked my leak at the drain plug down to a nick in the sealing surface on the outside of the pan. The standard size crush washer was too narrow to cover the entire nick, but Belmetric had one with the same ID and and 2mm greater OD - bought a dozen, use a new one at every oil change, problem gone.
     

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