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Total oil loss

Discussion in '308/328' started by Saabguy, Dec 11, 2021.

  1. Saabguy

    Saabguy Formula 3
    Silver Subscribed

    Mar 28, 2012
    1,684
    Shreveport, LA
    Hi all, I changed the oil and filter last weekend. 9+ quarts of Mobil 1 0w-40. I ran the engine enough to distribute the new oil, waited 30 min and checked, was reading spot on for full oil, to be specific, it was in the middle of the series of holes.
    Went out today, started engine long enough to move car 20 feet forward. Waited 15 minutes and the oil is now at the MIN mark.

    There is no puddle of oil under the car

    There is no visible oil in the coolant (No milkshake)

    Yes this is the car that showed oil leaking down front bank but I can't see 9 quarts leaking from a standing car without leaving a trace on the ground.

    Does this mean that I am losing oil to the gear oil section?

    ARRGGHH!
     
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  3. miketuason

    miketuason F1 World Champ
    Silver Subscribed Owner

    Feb 24, 2006
    14,783
    Cerritos, CA.
    Full Name:
    Mike
    You may want to check or better yet replace the shift shaft seals, one seal is locate inside between the engine oil bay and the gear box, this is the seal that separates the two oil from mixing. I’m not sure but your engine oil could be sipping through the seal and to the gear box since you mentioned there’s no obvious leak on the floor.
     
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  4. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    28,967
    Austin TX
    Full Name:
    Brian Crall
    Its possible but I am far more suspicious of the methodology of checking the level. It has been so well known they can be difficult to do it with consistent results when we were checking them for possible excess oil usage for warranty the factory had us go through a long process that ended with draining it and weighing it. We were not allowed to just use the dipstick because the factory was so aware of its inconsistency.


    Additionally when filling since they have a well known problem with oil starvation in right hand turns either full or a little over is advisable.
     
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  5. Saabguy

    Saabguy Formula 3
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    Mar 28, 2012
    1,684
    Shreveport, LA
    Thanks Brian. I'll add the last of the oil and check again later.

     
  6. FiatRN

    FiatRN Formula Junior
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    Nov 21, 2008
    292
    Denver, CO
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    Jonathan Drout
    Deep breath - things are not as bad as you fear. the difference between "between the dots" and the Min marks is not all 9 quarts. It might be a quart. And a quart difference in reading could be about how long it was draining back, or how empty the system was when you started, or slope you are parked on, or something besides 'all the oil has been stolen by space aliens.'
     
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  8. Alex308qv

    Alex308qv Formula Junior

    Jul 1, 2016
    331
    PA
    Full Name:
    Alex
    The manual as I recall says start at operating temperature, turn off, wait 15 minutes, check level.

    After doing this a few times, I noted the corresponding level on the dipstick the next morning with a cold/drained engine. It’s slightly above the top hole. I just check mine cold now (easier).
     
  9. johnk...

    johnk... F1 Veteran
    Owner

    Jun 11, 2004
    9,429
  10. absostone

    absostone F1 Veteran
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    Jul 28, 2008
    6,999
    Is this a 2V carbed engine?
     
  11. Saabguy

    Saabguy Formula 3
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    Mar 28, 2012
    1,684
    Shreveport, LA
    Negative. Its a meat popsicle.

    Funny if you get the reference

    It's an '88 328

     
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  13. absostone

    absostone F1 Veteran
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    Jul 28, 2008
    6,999
    ok. no idea about the meat popsicle. But I am heading to The Capital for some fine steak
     
  14. Lawrence Coppari

    Lawrence Coppari Formula 3

    Apr 29, 2002
    2,032
    Kingsport, TN
    Full Name:
    Lawrence A. Coppari
    The oil level in the engine is higher than the oil level in the transmission. If the inner seal is leaking, engine oil will enter the transmission. I discovered this when my inner seal leaked. My '87 328 engine does not burn oil but once when I checked it I found the engine oil level close to the minimum reading on the dipstick and no oil on the garage floor. When I opened the fill plug on the transmission, dark colored liquid poured out. I changed both seals.
     
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  15. absostone

    absostone F1 Veteran
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    Jul 28, 2008
    6,999
    But it should leak out of the gearbox vent if its open to atmosphere, unless it recircs back to the gearbox no? When my shift shaft seals leaked it was messy out of the vent.
     
  16. Albert-LP

    Albert-LP F1 Veteran
    Rossa Subscribed Owner

    Sep 1, 2010
    7,362
    around Modena, Italy
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    Alberto
    0W oil can run across the gearbox oil seal better than others. The same it can do between the piston and liner.

    You could do a compression test: If the compression test is ok, then it's the gearbox seal that drains oil to the gearbox

    ciao
     
  17. Albert-LP

    Albert-LP F1 Veteran
    Rossa Subscribed Owner

    Sep 1, 2010
    7,362
    around Modena, Italy
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    Alberto
    But in my opinion you only did the second oil check in a wrong way, as it was too cold so it stayed in the engine instead of pouring into the sump immediately.

    ciao
     

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