oil on disc

Last week I noticed that my 87 90 2.5 na was pulling to the left under braking , i pulled the front os wheel off . on inspection i found the disc to be covered in a black oily mess . Gave it a good clean up banged in a new set of pads . Things went ok for a day or two , but the pulling to the left slowly returned . Again when i inspected the disc it had an oily covering . There is no brake fluid leaking . Is it possible that the oil is coming from the Swivel Housing along the half shaft ? Any ideas ?

hub seals gone i'd guess. i have it on my list to do. just rebuild the dodgy corner, about £50 for everything you need. at least it is crossed off the list for a year or so. my problem is the other side has gone as well now...but the car no longer pulls to one side

It sounds like your seals are leaking as mentioned above..... I damaged mine off road. My braking was not effected mainly due (I think) to disc covers and I spotted the oil dripping onto the path.
Two options.... replace the hub seal which means a fair bit of work (See Busters Tips for a photo guide) or drain the oil from the swivel housing and replace with oneshot grease.
The latter should do the trick. It worked fine on mine and that was 6 months ago. Worth a try for a few pounds

Thanks for the help , my 90 hasn't got the brake gaurd like is shown in the photo , I have now stripped every thing back to the chrome swivel ball , and its is really badly corroded which must have knacked the seal , now to find a new swivel !

Post a pic and let the Jury decide! I binned my disc gaurds as they catch all kinds of crap, stones etc if going off road... better off without