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  #1  
Old 12-30-2008, 04:00 PM
Atomic Dog Atomic Dog is offline
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Mein Auto: 1995 BMW 740I - E38/M60
740i fluid leak - update: PS fluid

I went to start my 95 740i this morning after leaving it sitting in the garage un-driven and un-started for two weeks because of snow. When I backed it out of the garage I noticed a small oil spot on the floor (about the size of a quarter). This struck me as odd because the car has never leaked anything before. The spot was located right between the front wheels and maybe just slightly towards the drivers side. My wife took the car today so I have not investigated this further than looking in the engine bay this morning before she left. I noticed that the oil line from the filter housing down to the bottom of the engine looked a bit wet. I could not see any sign of oil on the top side of the belly pan in the engine bay, but the underside was a bit wet towards the back end drivers side of the access panel. I drove the car and it gives no indication of a problem, but something has to wrong for it to leak when it never has before.

Does anyone know of a common problem with oil leaks that I should look into first? I did a bit of checking online today and found a few posts regarding the oil separator. Any thoughts would be appreciated.

-Atomic Dog
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  #2  
Old 01-05-2009, 07:15 AM
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crewdog843 crewdog843 is offline
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Mein Auto: '08 Z4 3.0si Roadie
First of all, make absolutely sure that the drip is in fact engine oil. These cars are notorious for power steering hose leaks, and they typically appear between the front wheels slightly toward the driver's side. Both fluids can look very similar to the untrained eye.

Your best bet will be to elevate the vehicle, crawl under it and if there is a plastic shroud under the engine, remove it. Look carefully at the shroud (if there is one) and if it is oil, you might find that the shroud has redirected the leak. If there is no fresh oil on the shroud, look at the left front under the headlightt, as there are hoses running into the radiator. You might find your problem there.

jake
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  #3  
Old 01-07-2009, 05:43 PM
Atomic Dog Atomic Dog is offline
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Mein Auto: 1995 BMW 740I - E38/M60
Jake, it was indeed a bad power steering hose.
  #4  
Old 01-07-2009, 06:02 PM
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crewdog843 crewdog843 is offline
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Thank you for posting back with clarification. The power steering hoses on these cars are total junk, in my estimation. Mine have been replaced three times in three years, maybe not all the same hose, but definitely power steering hoses of one kind or another. Oil leaks are fairly rare, as most of the time, they are caught if not too severe, by the shroud. If you change your own oil, while you are under there, clean off the pan and the shroud, and the next time you change oil, check to see if you can spot any leak and fix it before it gets worse.

jake
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  #5  
Old 01-19-2009, 01:02 PM
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James740 James740 is offline
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Mein Auto: 1995 BMW 740iL
i found a leak in mine, a stripped bolt on the oil pan, glad your problem is fixed =)
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  #6  
Old 01-20-2009, 05:08 PM
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crewdog843 crewdog843 is offline
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The oil pan drain plug can be replaced as the metal is softer than the pan itself. In the interim, judicious use of teflon tape helps.

jake
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