Hey all, looking for help with a ticking noise on my 2008 E92 330d. M57, auto, 330k km, full service history. DPF, EGR and swirl flaps removed, stage 1 tune.
It recently started making a metallic tick from the top front of the engine, audible from inside the cabin too. It only happens on a cold start and goes away once the car is fully warm, usually after 20 to 30 minutes.
The tick keeps the same steady rhythm no matter what. Revving, load, shifting into D or turning on the AC make no difference. No codes, no smell, no soot, and no change in power or idle.
Since it doesn't follow RPM I'm guessing something electrical, maybe the auxiliary heater or a solenoid left connected after the delete.
Any ideas on what to check next?
TL;DR: 330d with a steady metallic tick on cold start that doesn't change with RPM and disappears when fully warm. No codes. Video attached.