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7 Series - E38 (1995 - 2001)

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  #1  
Old 10-07-2011, 08:31 PM
bimmerboz bimmerboz is offline
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Mein Auto: 2000 740
00 740i - Losing oil

my 2000 740il has an oil leak at the rear of the engine
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  #2  
Old 10-08-2011, 06:48 AM
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joyism5 joyism5 is offline
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Mein Auto: '99 740IL, K75RT
Rear main seal failure/or rear gasket (to fix that engine has to be removed).
Most likely is valve cover gasket. they are leaking on the block (under the intake manifold/ between heads), but the block has 2 draining hols at the rear, which will fool a rear seal failure.
In pic attached the draining holes are clogged. One draining hole is where the yellow ring is.
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Last edited by joyism5; 10-08-2011 at 06:50 AM.
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Old 10-08-2011, 09:58 AM
rplecty rplecty is offline
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What happens if those draining holes get clogged?

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Old 10-08-2011, 04:57 PM
silverhair silverhair is offline
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Then the oil will have a hard time draining and just pool up there. Am I correct Joyism.
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Old 10-09-2011, 11:26 PM
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Originally Posted by silverhair View Post
Then the oil will have a hard time draining and just pool up there. Am I correct Joyism.
Yeap! You will get so much oil in there , it might be visible under the throttle body. Finally will drip at the rear of the engine because of gravitation.
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Old 04-26-2012, 04:58 PM
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BigBoy740il BigBoy740il is online now
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Mein Auto: 1989/1991 E30; 2000 E38
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Is the leak visible through the transmission bell housing inspection hole? If its your rear main seal, you don't have to remove the engine. My indy quoted $500 to drop the exhaust, drive shaft, and transmission. All three have to be removed to replace the seal. Good luck.
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