I have a 1993 318i and i hear ticking at higher rpm's(starts around 1900) but really faint at idle ... I got this car and it runs good just the noise is killing me..I dont hear it inside the car just when i roll down the window.... I know the noise is coming from the valve cover and i took it off and to adjust the valves... but there was no way to adjust them.. (not like old chevy motors)... I dont feel like replaceing everything under the hood till i get it..
I;ve heard it all from using a better gas to ,lifters to ,oil to ,timeing chain to ,water pump to ,fuel injectors ...... what is it??? I know Almost all these cars do this but whats the sure bet on what it is?

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Im thinking its the lifters but there is this black shroud that covers the rockers and lifters and cam... i wonder if maybe that is hitting a rocker and making that noise??? i was going to just take it out but didnt know if i should ..i think that it makes the oil splash on the cam and lubes it???
I also tryed some of that thick ass oil thats like for motors to stop smokeing and makeing noise but didnt do anything...( and no it wasnt smokeing befor that eather). any one have any good ideas or dose it turn out that im going to have to chase down the noise peace at a time???
oh yeah the cars has 171000 k about 100000 miles