i have an 89' 525i. about a year and a half ago i replaced the cam,rockers,valve springs and re-installed the head (bought the car used,mileage unknown, stuck at 299,996 km) vehicle was not running and had a worn cam and broken rocker. fast forward to today. motor "tap" was getting louder, removed the oil filler cap when running and find the oil sprayer bar not"spraying" but more like dripping( at least on #1 cyl. as thats all i can see w/valve cover installed) i also see that the cam lobe is worn out. i bought a used head off e-bay wich appears to be good. i will be checking oil pressure soon( sucks as the sender is in between the p/s motor mount) my question is #1- should the oil sprayer bar be "spraying" as the name implies? 2. why does the idle act wierd, dropping when the filler cap is removed and goes back to normal when re-installed? any help is appreciated. i don't want to toast another head.