My '91 E34 520i 24v (m50b20 engine) cold starts with a very annoying ticking sound from the engine, to be exact from the engine head. After a few minutes it stops until a next cold start. I have changed oils, grades, synthetics, minerals, additives (Würth, STP ...) it still does the same lifter ticking every damn cold start. Except this, everything is just fine (oil consumption, oil color, performance, sound, temperatures etc.).

Anybody solved this without changing the 24 lifters, if not, anybody actually did the job of installing new lifters ? Please send me some detailed info's about the procedure.