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Old 11-09-2012, 08:13 PM
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Zeichen311 Zeichen311 is offline
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Join Date: Mar 2011
Posts: 4,287
Mein Auto: '11 335xi 4dr; '03 330Ci
Originally Posted by cadieuxj View Post
Thanks for the advice. I've owned the car for a month now and the oil level on the dash hasn't moved, which I find odd since its obviously leaking

Also the oil seemed to be on the inside of the foam, the outside wasn't as saturated.
You might be astonished at how big of a mess you can make with just a half-cup of oil. That amount wouldn't register on the dash readout and would be barely noticeable even on a conventional dipstick. Soaking that hose for much of its length might not require half that much.

Outside vs. inside may suggest the source is the hose but is far from conclusive. Oil dripping near one end of the insulation sleeve could easily be wicked inside. To rule out the hose itself you will need to remove that insulation and clean the hose thoroughly, which is likely a PITA (and you might not be able to replace the insulation without removing & reinstalling the hose--possibly a yet-bigger PITA). That's why I suggest checking everything nearby first.

Consider getting the car in the air, even if only on jackstands, removing the underbody splash shields and inspecting the area from below. Leaks are sometimes easier to track down from underneath the engine. You may also have better access to that hose to inspect it directly.

It is exceedingly rare for that type of line to spring a leak except at couplings or where it has been pinched, crushed or chafed. If you see no obvious signs of damage and it is not leaking from the crimp connections at either end (and from your photo, at least one end looks OK), the culprit is almost certainly somewhere else.
2011 335xi Individual 6MT - Azurite Black Metallic / Oyster & Black / Anthracite Maple + all the good stuff
2003 330Ci Sport 5MT - Black Sapphire Metallic / Natural Brown / Myrtle + the important stuff

   N47 35' 30.13" E11 10' 33.36" - End of can guess what came next. BMW CCA
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