OM651.930 potential rattle

[Bebbet]

Hello to everyone,

I have something that is making me overthink. I'm currently driving Infiniti Q50 with the om651.930 engine. The car has been near flawless so far, but I've noticed on cold start, after a few seconds, the engine noise settles a bit. From my research on the topic and hearing many rattling timing chains on videos, the one I have is nowhere close to absolute rattle, yet again, it concerns me. I've uploaded a Reddit thread. My other theory is, lack of oil pressure first few seconds. Engine is at 316k km, any opinion is appreciated!

 

[alexanderfoti]

Sounds normal to me, maybe the start of a wastegate rattle but very good for a 300+ k engine.

 

[Bebbet]

Sounds normal to me, maybe the start of a wastegate rattle but very good for a 300+ k engine.

I'm glad to hear this. I drive it myself last 40k, oil changes every 10k. Can this wastegate rattle be the reason for something like a buzzing sound? Example: I go to the store on hot engine, leave the car for 30 mins shopping, I come back, start engine and take off after 5 seconds, I notice a weird sound first 50-100 meters, specifically above 1.5k rpm. It kinda sounds like it's from the injectors, but I'm not so educated. I'll try to capture the sound later on. Thank you for the opinion!