Hello yours, I have problems with my X20XEV, Built. 99, approx. 105 tkm. Forward: The engine was never driven with too little oil, never overheated or similar. Every 10,000 km it gets fresh Castrol Magnatec 10W40. For a short time I have a flap in cold engine condition. It sounds metallic, as if it was a single conrod or crankshaft bearing. If I reach an engine temperature of 90° C or more, it is no longer to be heard. This flap is just variable in speed and changed As far as I could locate it, it comes from the engine block itself. I definitely exclude a “tired” hydro-punch. My thought now goes there, if maybe not enough oil pressure is built up and the flapping is therefore no longer noticeable at high temperature and thin oil. So my next step would be an oil pressure measurement. Do you still have a saving idea? Thank you and many greetings Harry