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-   -   00 740i - Losing oil (http://www.bimmerfest.com/forums/showthread.php?t=573567)

bimmerboz 10-07-2011 08:31 PM

00 740i - Losing oil
 
my 2000 740il has an oil leak at the rear of the engine

joyism5 10-08-2011 06:48 AM

1 Attachment(s)
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.

rplecty 10-08-2011 09:58 AM

What happens if those draining holes get clogged?

Sent from my HTC Wildfire S using Bimmer

silverhair 10-08-2011 04:57 PM

Then the oil will have a hard time draining and just pool up there. Am I correct Joyism. :p

joyism5 10-09-2011 11:26 PM

Quote:

Originally Posted by silverhair (Post 6367479)
Then the oil will have a hard time draining and just pool up there. Am I correct Joyism. :p

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.

BigBoy740il 04-26-2012 04:58 PM

@ Bimmer boz
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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