Hi everyone, I've recently changed my Timing Chain @ 145,000km, High Pressure Fuel Pump, as my engine valve cover is leaking, mechanic show me the chain is very loose F10 528i 2012. However, after changing it, I find that my engine is very rough, dragging at low speed and the engine is much louder, vibration is stronger. I changed my engine and gearbox mounting at 130,000km. Any idea what's wrong? Otherwise, everything else is working fine. Previous "DriveTrain error" is no longer there when I'm in SPORT mode.