bad smell

just a little about my problem(e46 2001 325i) after taking long drives anything over 45 minutes there is a distinct burning smell (although hard to describe). The Valve cover casket and oil seperator were replaced just last year so I am ruling this out. There is no visible smoke coming from engine.....this smell has been noticeable for about 6 months now and I realize I can't ignore it much longer. I am in the dead of winter right now and will have to wait a couple of months b4 doing any work If anyone has any ideas as to what my problem might be I would appreciate any help thxs

Hi. I have heard the most common cause of a burning smell is oil leaking from the rocker cover. I wouldnt rule this out even though you say it was done. I have the same problem. On a long drive after stopping the front of the car really pongs of burning oil and I do have to top up about a half litre every 6 weeks. Im assuming a leak somewhere, and as Ive got no oil stains on the drive where I park I guess its seeping out somewhere onto something hot and burning off. From the info Ive read on here seems its most likely a leak around the top of the engine. Like yourself got bad weather here at moment, 6-8 inches of snow and minus 10 most nights.....its the UK lol so finding the time to get it sorted is tough right now. I would advise investigating this and if your topping up the oil like me then its certainly a leak somewhere. Dont ever assume a new part can be ruled out of any fault finding procedure. Also keep on searching the forums.....this site is invaluable for great advice. Good luck and keep us updated.

+1 on valve cover gasket. I had one leak only 8 months after installing it during a vanos rebuild. Bad brand, I guess, although I can't remember which. When the engine is not too hot, feel for oil on the head above exhaust manifold ports 4-6.

Double check the VCG for sure. It can leak with the slightest gap.

Originally Posted by Solidjake

Double check the VCG for sure. It can leak with the slightest gap.

Generally it's oil seeping onto the hot exhaust.

Look there first (passenger side of the engine).

thank you all for quick response soon as weather warms up a bit will check out oil problems will keep all updated thanks again