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360 Oil under throttle body

Discussion in '360/430' started by 550nitis, Aug 21, 2020.

  1. 550nitis

    550nitis Formula Junior

    Feb 3, 2016
    400
    Los Angeles, CA
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  3. flash32

    flash32 Formula 3

    Aug 22, 2008
    2,168
    Central NJ
    Full Name:
    Dominick
    Have you check your oil level as per manual ? Maybe overfilled ?

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  4. Kevin Rev'n

    Kevin Rev'n F1 World Champ
    Rossa Subscribed Owner

    Nov 29, 2009
    14,637
    Honolulu
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  5. 550nitis

    550nitis Formula Junior

    Feb 3, 2016
    400
    Los Angeles, CA
    Must have been the oil service I did last year. Due for one shortly will make sure they pay attention to that.
     
  6. flash32

    flash32 Formula 3

    Aug 22, 2008
    2,168
    Central NJ
    Full Name:
    Dominick
    If it is overfilled I wouldn't drive it too much longer you just going to make matters worse and possibly ruin your MAF sensors

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  8. Marcoboxer

    Marcoboxer Karting
    Silver Subscribed

    Oct 5, 2019
    106
    Alpharetta, GA
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    Mark Roberts
    I had the same when removing my air box covers on my F430. The resonance tubes (not sure if that's the correct name) attached to the air box covers actually had oil sitting in them. The bottom of the MAF was oily too. Cleaned up best I could. I assume it's from an overfill.
     
  9. Kevin Rev'n

    Kevin Rev'n F1 World Champ
    Rossa Subscribed Owner

    Nov 29, 2009
    14,637
    Honolulu
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    Well you can check the dipstick with the car cold and you should see no oil on the stick! Trouble is that the difference of oil level between a warm engine and very warm engine is a big swing too. You might be able to let the car run and keep checking it as the engine temp starts to come up. You could shut it down if it's going too high up the stick but it will take you 15 minutes of idle for the engine to reach correct temp for checking and it's a hot place to hang out but that is what I would do. If the oil level is not overfilled then maybe you have some weeping from a loose band clamp or a previous over fill in the past. Can you easily twist the TB's? The band clamps can be carefully pried open to loosen them and remove stuff to check but you'll need the correct tool to tighten them. I have used small flat head screwdriver in the pinched ear and gently open up the pinched ear until you can slide off the tube or component.

    Oetiker Clamp tool

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  10. Skidkid

    Skidkid F1 Veteran
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    Aug 25, 2005
    6,500
    Campbell, CA
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    John Zornes
    Oil is checked at full operating temp and idling. Set the cap on top of the reservoir, not screwed down, when checking oil. SO, it is best to check after you get back from a drive. Don't shut it off. Check when idling. Wear gloves because the cap gets very hot.
     
  11. EastMemphis

    EastMemphis Formula Junior
    Silver Subscribed Owner

    May 25, 2019
    819
    Memphis, TN
    Full Name:
    John
    Another thing that overfilling the oil can kill is the throttle body itself. The TB should be operating in a dry environment. When oil gets into the vent, and then passes by the TB, some may work its way into the electronics and motor area. That oil will dissolve the coating on the TB potentiometer thus destroying it, or severely shortening its life. These things are expensive too, around $1750 (Ricambia) each. If you're seeing oil seeping out of the TB, you have a potential expensive mess that should be cleaned up quickly.

    At the very least, you should remove the rubber damper tubes that connect the TB to the MAF and clean everything carefully. It's also likely your MAF's are already contaminated and ruined, or their life severely reduced.

    Here's what the inside of a TB should look like:

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    The above TB is from a 360 and has 20 years on it. Notice how clean everything is? I didn't have to touch it except to blow out some carbon buildup from the brushes.

    The good news is that if you do ruin your TB's, they can be rebuild for $150 each using parts from another, less expensive, model like the Bosch 0 280 750 474.

    Another way to remove the single ear crimp clamps is using an awl. A screwdriver can twist the clamp, destroying it. Working the awl into the crimp and rocking it back and forth keeps distortions to a minimum. Remember, never try and reuse a crimp clamp on ANY connection that carries liquid or holds pressure. The recrimped clamp will be a lot weaker and potentially leak. Always use a new clamp on such connections and use the proper tool to crimp it.

    I've just recently become an expert at understanding and diagnosing problems with TB's...
     
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