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View Full Version : Mysterious big oil leak


Coffey92
09-24-2012, 03:04 AM
What's up guys, first post on here,
Just bought a '96 740il for cheap money and needed some repairs. After getting the car up and running there is now a steady oil leak when the car is running. I put it on ramps and degreased ALOT of gunk under there. I then started the car, went back under and looked for the leak. Its coming from the front drivers side near the tire. The oil is running off other parts steadily onto the driveway, making it hard to locate the exact location. Any ideas as to where it could be?

Other Info:
- oil filter housing is fine, but I think the leak may be in the hose(s) off there
*any info on those hoses is awesome
- not leaking from oil pan
- not leaking from vcg's
* just replaced them
- no coolant on ground, but seems to piss through it

bayerisheteknik
09-25-2012, 03:09 PM
i think if you posted some good pics of where oil is coming from someone would reply

Emeer18
09-26-2012, 12:16 AM
I dont know if your year is like the 03-06' 7's but there is a back plate on thevalternator that connects to the engine and when the seal goes bad oil leaks, pretty hard to find too.

bayerisheteknik
09-26-2012, 07:37 AM
I dont know if your year is like the 03-06' 7's but there is a back plate on thevalternator that connects to the engine and when the seal goes bad oil leaks, pretty hard to find too.

just did mine couple months back...not sure if his 7 has the same engine...has to be h20 cooled generator either 150 or 180 amp

<a href="http://tinypic.com?ref=i739ll" target="_blank"><img src="http://i48.tinypic.com/i739ll.jpg" border="0" alt="Image and video hosting by TinyPic"></a>

<a href="http://tinypic.com?ref=2z5ndzo" target="_blank"><img src="http://i45.tinypic.com/2z5ndzo.jpg" border="0" alt="Image and video hosting by TinyPic"></a>
and that the little sucker thats leaking a 1.40 gasket from dealer if he has the same engine
<a href="http://tinypic.com?ref=301j3h1" target="_blank"><img src="http://i46.tinypic.com/301j3h1.jpg" border="0" alt="Image and video hosting by TinyPic"></a>

Emeer18
09-26-2012, 09:58 PM
just did mine couple months back...not sure if his 7 has the same engine...has to be h20 cooled generator either 150 or 180 amp

Thats the exact issue lol. That damn gasket. It seems like all the rubber parts on this car fail and end up costing $500+ for a $2 gasket. CCV's, VCG, Alternator back plate, the Universal flex disk(Guibo), etc the list goes on!:dunno::rofl::thumbup:

bayerisheteknik
09-28-2012, 08:49 AM
Thats the exact issue lol. That damn gasket. It seems like all the rubber parts on this car fail and end up costing $500+ for a $2 gasket. CCV's, VCG, Alternator back plate, the Universal flex disk(Guibo), etc the list goes on!:dunno::rofl::thumbup:

i guess after years of use everything has to be changed...
mine started leaking the next day after i bought it....and i know the crook owner knew about it thats why he was selling it since he couldn't keep the car or had the experience to work on them...
that was funny me waking up getting ready to wax,clean the car and all i saw was oil dripping like there was a whole in the block...lol
but thanks to this forum it ain't a hard job:thumbup: