BMW N52 VALVE COVER GASKET REPLACEMENT

Hey Dean,
First of all, your videos are a blessing. You're more knowledgeable about these n52s than any other dealer i've ever been to. I don't want to bother, but I've been trying to figure out what's wrong with my 2008 528i that has 178k miles on it.

The car starts fine besides the occasional rattling/ticking sound that's prominent on start up but goes away after driving. Once I drive off and come back down to a stop though, the idle drops to about 500rpm and the engine shudders like it's about to stall before bouncing back up. Sometimes before bouncing up the car will misfire for around 20-30 seconds before fixing itself and idling normally, and it also will fix itself if I just start driving off. I also seem to be either burning or losing oil as well as coolant, as I've had to top up the coolant 2 times since owning it and oil 3 times, but I can't find a leak.

What are the main things I should check, and could you maybe direct me to any videos you have that would help me take care of that? The car performs great for its age when driving and I'd like to maintain it as long as possible.

Thanks so much, you're awesome at what you do.

My valve cover is plastic would u recommend getting an aluminum one if yes from where?

I might need to do this to my N55. It definitely has a better vanos system as from what I can see in this video.
Very well explained as well!