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Thread: M30 engine oil leaks

  1. #11
    Join Date
    May 2004
    Location
    San Joaquin Valley CA
    Posts
    264

    Default M50 Oil Leaks

    Again, my apologies for the hijack

    Quote Originally Posted by Rus View Post
    Paul,
    My brother recently tackled an oil leaks on his M50. Specifically the oil filter housing oil leaks. Where is your leak originating? Just thought I'd throw this out there.

    My leaks are at the front and rear of the engine, driver's side (US) above the level of the oil pan. Might be oil filter housing and just blowing rearward, but It sure doesn't look like it. Hard to say with any certainty. Maybe go ahead and try the OFH and the Russian kid mystery spot, eh?

    Quote Originally Posted by russiankid View Post
    Check out this thread, may be your problem.
    http://forums.bimmerforums.com/forum....php?t=1109419
    Thanks for that. Where is that on the motor? Maybe a wider shot would help, I can't deduce from the tight photo where the heck that is.
    Thanks again.
    Much more and I will have to put this all in a new thread.
    (end hijack II)
    Link to my M50 engine rebuild thread
    http://www.bimmernut.com/forum/showthread.php/43339-M50-Eng-4L30E-Trans-RRR-Far-More-Than-I-Ever-Expected?highlight=93+525+paul


  2. #12
    Join Date
    Aug 2008
    Location
    Pennsylvania
    Posts
    206

    Default

    Quote Originally Posted by 93 525 Paul View Post
    Again, my apologies for the hijack




    My leaks are at the front and rear of the engine, driver's side (US) above the level of the oil pan. Might be oil filter housing and just blowing rearward, but It sure doesn't look like it. Hard to say with any certainty. Maybe go ahead and try the OFH and the Russian kid mystery spot, eh?



    Thanks for that. Where is that on the motor? Maybe a wider shot would help, I can't deduce from the tight photo where the heck that is.
    Thanks again.
    Much more and I will have to put this all in a new thread.
    (end hijack II)
    Its the oil filter housing. Stand on the drivers side of the car and look at the oil filter housing. It is located on the right side of it under the intake manifold. Look for the oil pressure switch, one is near it, and the other one is lower.

  3. #13
    Join Date
    Oct 2005
    Posts
    518

    Default

    So now we have update #5. The oil leak is still present after I sealed up the CPS mount bolt. At this point I guess its either the crankshaft seal, the timing cover seals or the oil pan seal. Bummer I'll see if I can tighten the bolts on the timing cover, but something tells me that won't help too much. How common is it for the crankshaft seal to leak on the M30 engines?

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