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Old 09-06-2016, 06:21 PM   #1
sam_
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Very strange and large oil leak

Hi all,
So my car has been sitting for ~2 months due to the airbag recall (I opted to get in a rental car). However, I've noticed this pretty hefty oil leak from seemingly unknown origins. It's dripping off the furthest corner of the front subframe brace on the passenger side.


Any help would be appreciated- I've jacked the car up but couldn't trace the leak.


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Old 09-06-2016, 06:34 PM   #2
Yewzer B Lewzer
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Great thread on this:

http://forum.e46fanatics.com/showthread.php?t=882732
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Old 09-06-2016, 06:39 PM   #3
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Quote:
Originally Posted by Yewzer B Lewzer View Post
Thanks! Although, I have read this and inspected what the likely culprits could be from that list but they all seemed to be in pretty good shape.
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Old 09-06-2016, 06:49 PM   #4
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My best guess would be the OFHG but it does look ok from the top. I guess I might as well try and replace it just for peace of mind.
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Old 09-06-2016, 06:54 PM   #5
Yewzer B Lewzer
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If the OFHG is leaking oil will puddle up on the nodular reinforcements on the engine block on the drivers side just above the oil pan/ engine block seam.
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Old 09-06-2016, 07:03 PM   #6
Yewzer B Lewzer
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Right here under the OFH:

Click image for larger version

Name:	ImageUploadedByBimmerApp1473206596.971181.jpg
Views:	38
Size:	221.2 KB
ID:	640473
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Old 09-06-2016, 07:07 PM   #7
sam_
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Quote:
Originally Posted by Yewzer B Lewzer View Post
Right here under the OFH:

Attachment 640473
Oh awesome. I'll give it a look then, thanks! Much appreciated.
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Old 09-06-2016, 07:12 PM   #8
cvx5832
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Quote:
Originally Posted by sam_ View Post
My best guess would be the OFHG but it does look ok from the top. I guess I might as well try and replace it just for peace of mind.
Removing the brace and inspecting from below will take less effort than randomly replacing the OFHG.

It's good PM, but I wouldn't replace anything without some semblance of what's at fault.
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Old 09-07-2016, 09:39 PM   #9
Onizukachan
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Hope it isn't an automatic.
Otherwise it could be rebuild time.

If you have an extendable mirror that will help a lot.
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Old 09-07-2016, 09:41 PM   #10
KendrickC
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It wouldn't be a trans oil leak that far forward. Besides trans oil smells like crap, so it's almost instantly identifiable. I would say the above posters suggesting OFHG are probably most likely, otherwise it would be best to take off the bottom panels, and inspect the oil pan gasket and possibly see if the rear main seal has completely given out.
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Old 09-07-2016, 09:46 PM   #11
Onizukachan
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Actually, that's exactly where mine leaked from when the tc/pump decided to commit seppuku. Except mine was running out on the driver's side of the brace. Dab some on a white paper towel, pull the dipstick and dab it see if the colors match. If they do it is oil, if they don't, it's trans.
Mine didn't smell bad either.
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Old 09-07-2016, 11:05 PM   #12
sam_
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Honestly it would be cool if the transmission was done because that would give me an excuse to finally pull the trigger on a manual swap.


But it is engine oil.
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