ducman 0 Report post Posted January 25, 2012 I have my P/F E30 320i diff out and the cover off. The oil was very black and has left a lot of residue inside the case. Is there a solvent I can flush out the case with that won't damage any seals or bearings? Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted January 25, 2012 (edited) Wash it out with white spirits or petrol. Use eurothane to seal the rear cover and I would also replace the seals while it was out. Use 75w90 full synthetic oil Edited January 25, 2012 by *Glenn* Quote Share this post Link to post Share on other sites
ducman 0 Report post Posted February 6, 2012 Thanks Glenn, I just had a bit of a break from the car. I have replaced the output seals as they were leaking a little. The input seal seems fine; I'll look up how to change it. If it's not a big deal I'll do that too. Quote Share this post Link to post Share on other sites
