N62 engine valve stem seals

[Anshev]

Originally Posted by X5only

Late update

NO SMOKE !!!!!!!!!!!!!! Took her for a long drive, idled for 45 minutes until I got tired . Wow, what a feeling it was to see no smoke after revving hard . It took about 100 miles of driving for the stinky exhaust smell to completely go away. But the smoking stopped immediately . I also did an oil service with BMW performance oil, getting ride of the heavy oil and lucas additives I'd been using.

For those who believe it's vacuum leaks causing the smoke and therefore only go as far as replacing the valve cover gaskets and the associated seals, I'd recommend to go all the way and replace the valve stem seals as well because you've already done most of the work anyway, and it's not like the valve stem seals last forever. It's what finally stopped my smoking issue after earlier on wasting time and money replacing both valve cover gaskets and seals. And for those hesitating to do this project, if you can replace the valve cover gaskets, the valve stem seals replacement is very much within your skill level. Go for it! Using a bungee cord, instead of an air compressor, certainly makes the project much, much easier, safe and you can take your sweet time working without being a noise nuisance. Some say it can be done without a compressor or cord; indeed you can since all is needed is to make sure the cylinder you're working on is at TDC, but for the average DIY'er tackling this project for the first time, better to play it safe and sure … your choice

Ready to sell the tool? ...I am planning to do this job on 2009 X5 4.8 with 86k