(2013 G37x )IVE ALREADY REPLACED IDLE TENSIONER ASSEMBLY ( 3 parts and the belt!) I know it’s a tough ask esp over a video, but I can’t figure it out. Only does it on a complete cold start in the morning, or after I’ve driven it, but let it sit for over 5/7hrs to let the entire body cool (to account for heat expansion) and doesn’t continue after that initial chirp, I could start it 20 times after the initial first where it does chirp, and it won’t repeat (second reason for complete cold start). I don’t think it’s dry starting, I just changed the entire idle tensioner pulley assembly (not the ac compressor or the water pump.) I don’t think it’s lifters or vvel, my only guess at this point, maybe it’s the engine itself and something inside it, the tranny (sometimes there’s this other weird noise when driving between (1.5-3k rpms) usually in a mid gear like 3-5, usually whenever you’re on accel, that noise doesn’t happen at all in a park position rev, or neutral, another reason I think it could be tranny). Thanks for the help in advance I appreciate it!

 

This is the video