marshallma0504
SHO Member
Hello, this is a new thread related to my last thread titled “new turbo.” At the end I started talking about I have had and continue to have a metallic slap/rattle noise at idle both cold and hot, but it is much more noticeable lately when the car is cold after replacing the turbo (the extra cold start noise might be related to this polar air.). Through first gear the noise gets faster in rhythm, then goes away entirely shortly before the 1-2 up shift. No drivability concerns or loss of power (actually the opposite since I replaced the front turbo it feels smoother and stronger.) so I am skeptical of if it is valve train related or not. My mechanic brought up the timing degrees and when it was cold, the actual idle was at 12-15 degrees positive timing, while the desired was 0 degrees. Of course which is way out of spec of the + or -5 degrees it is supposed to be. Any thoughts would be appreciated. Here’s the links to the YouTube videos, and I plan to also get an under the hood video if needed, or a driving video.
Cold idle video
Hot idle video
Cold idle video
Hot idle video
Last edited: