ticking sound at start-up..ideas? -video

[Freestyler]

Since it only occur during cold start, -where the computer is adjusting all kinds of stuff according to the feedback it gets from the various sensors, it would seem like it is overcompensating a bit on either ignition timing or some vanos adjustment. But quickly re-adjust as soon as it detects knocking.

I'm purely guessing here. But what else could cause 2½ knock and then nothing..

[four.8is]

Originally Posted by Freestyler

Since it only occur during cold start, -where the computer is adjusting all kinds of stuff according to the feedback it gets from the various sensors, it would seem like it is overcompensating a bit on either ignition timing or some vanos adjustment. But quickly re-adjust as soon as it detects knocking.

I'm purely guessing here. But what else could cause 2½ knock and then nothing..

It is indeed a guessing game ...will leave it alone for now just wondering if anyone else with a N62 motor is getting the same noise besides me and optimusprim5

[Jungerishere]

I have N62 4.4 engine and it doesn't make that noise. I checked again about 30 minutes ago and no odd noise like the sound from your video. Sorry, I have no idea what that could be.