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  1. #1
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    Oil leak -- Brainstorming and seeking advice

    Hey Everyone,

    during my last visit to the dealership I was told the car had an engine oil leak and the oil filter housing needed to be replaced (850$ Click here to enlarge). The car goes through half a quart of oil every 3000 miles and I drive hard so it seems that leak is not severe.

    I had my ETS intercooler installed by my local COBB shop and they said the undertray had a lot of oil on it. Probably accumulated over time. However they could not pinpoint the location of the leak and they said it seems the oil filter housing is not leaking!

    I did some research and compiled all the locations that are prone to oil leaks:

    1) oil filter housing (picture3)
    2) valve cover Gasket (picture 2, #6?) (and would that oil get to the undertray??)
    3) oil pan (Picture 1)

    Did I miss anything here? I would appreciate if someone could add to this list based on their experience.

    Now with that said, I will be changing the spark plugs tomorrow at home. If they are all dry and I find no sign of oil on the coil packs or anywhere on the head, I will conclude that my valve cover Gasket is OK. Is that a fair assumption?

    I'm leaning toward the oil pan or oil filter housing based on research.

    Tips and pointers are appreciated.

    Thanks!
    Marv

    Click here to enlargeClick here to enlargeClick here to enlarge
    SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555

    '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2
    installing soon: Mfactory LSD, , powerflex subrframe bushings

  2. #2
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    My oil cooler connectors were leaking and collected in the under tray as you described. I have the AR stg 1 oc though....
    Click here to enlarge
    ESS 6XX kit

  3. #3
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    It's worth checking! Thanks
    SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555

    '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2
    installing soon: Mfactory LSD, , powerflex subrframe bushings

  4. #4
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    Very unlikely they need to replace the housing...its most likely just the two oil filter housing gaskets and you're good to go..its a common bmw issue usually happens at 50-60k miles
    Click here to enlarge

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    Woops, I meant the two gaskets Click here to enlarge It's just that I can find any leaks there nor could the mechanic at COBB. They cleaned the undertray, and I will be putting in a new clutch (Thanks for the advice) at their shop next week. Hopefully, i'll get this thing resolved. Those 2 gaskets should be relatively easy to change.
    SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555

    '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2
    installing soon: Mfactory LSD, , powerflex subrframe bushings

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    I had similar issues on an old saab turbo, but I ended up adding a oil based florusecent to my engine oil, then I used a UV lamp to see exactly where the oil where "leavin" the engine. Now I had access to all of this but I assume it should be simple stuff to get if one gets desperate.

    Good luck, hope you sort this out !
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  7. #7
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    I like your solution! Didn't hear of it being done on engine oil before. Hopefully it's just the gaskets in the oil filter housing
    SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555

    '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2
    installing soon: Mfactory LSD, , powerflex subrframe bushings

  8. #8
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by marv85 Click here to enlarge
    Hey Everyone,

    during my last visit to the dealership I was told the car had an engine oil leak and the oil filter housing needed to be replaced (850$ Click here to enlarge). The car goes through half a quart of oil every 3000 miles and I drive hard so it seems that leak is not severe.

    I had my ETS intercooler installed by my local COBB shop and they said the undertray had a lot of oil on it. Probably accumulated over time. However they could not pinpoint the location of the leak and they said it seems the oil filter housing is not leaking!

    I did some research and compiled all the locations that are prone to oil leaks:

    1) oil filter housing (picture3)
    2) valve cover Gasket (picture 2, #6?) (and would that oil get to the undertray??)
    3) oil pan (Picture 1)
    Your turbo oil lines, are highly suspect. The last time I was in the shop, my turbos were covered with oil.

  9. #9
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    Click here to enlarge Originally Posted by Turkeybaster115 Click here to enlarge
    Your turbo oil lines, are highly suspect. The last time I was in the shop, my turbos were covered with oil.
    I'll check that as well. we're talking about these, right?
    Attached Images Attached Images  
    SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555

    '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2
    installing soon: Mfactory LSD, , powerflex subrframe bushings

  10. #10
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by marv85 Click here to enlarge
    I'll check that as well. we're talking about these, right?
    Yup.

  11. #11
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    cool, thanks
    SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555

    '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2
    installing soon: Mfactory LSD, , powerflex subrframe bushings

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