Strange noise from 328 engine.

Hopefully you have some ideas what this strange noise is, coming from the engine. It appears upon a cold start, almost every time. Sounds like small fire crackers. The sound dissapears after around a minute. Engine seems to be running fine. Of course while at workshop, they didn’t hear it when starting 4 times over the course of a week, so they couldn’t help and didn’t find anything. Recent service with belts. Please check a video I uploaded to YouTube.
https://youtube.com/shorts/iCm6VIM-w28?feature=share

 

Thanks. Yes, the sound is on the right hand side. At the workshop they also suspected something like this and checked the tension on all these belts. So that's probably not it.

 

Thanks. Exactly, it sounds like sparks. I replaced all extenders and leads, but the noise was still there. The coils were replaced with new ones last year.
To describe how it started: I had a service done a couple of months ago. The very next time I started, it ran badly and made rattling noise. When I looked under the hood I saw sparks where the lead is connected to the coil. It turned out to be a bit loose. After pushing it back, it ran better, but there were still occasional sparking sounds when cold. So this is when I decided to replace extenders and leads, thinking this would solve it, but it didn't...

 

Thanks, I will try that. The ac has never worked, despite some attempts in the past. During the service they had a look but we decided to leave it. This could explain why the noise started after the service.

 

Years ago a small crack in a manifold was fixed. At the workshop they also noticed that there was a small leak. But would it make this sparking noise, it is the combustion that you hear?

 

Thanks, helpful to know that this made a similar noise. Not sure which parts you mean, the manifold or further down?

 

That's worth a check, maybe go for a new manifold while at it, if it's not 100%. I am seeing varying prices, 1777 pounds (2450 $) at ferrariparts.co.uk but only 495 pounds (680 $) at superformance.co.uk. (And at Tubi a set of manifolds around 2500 euros, 2960 $). Any idea why the difference and where best to get it?
By the way it's a german car, I live in Spain.

 

Oh, that sounds complicated, but I will try to translate that into spanish an pass it on to someone who can check that for me. Will check out PD Gough, thanks for the tip. I expected the front manifold to be more complicated to change.

 

Ordered from superformance.co.uk, it did not seem original Ferrari parts.

 

Other comments also point toward the ac belt. Would it hurt removing the belt and drive, firstly to see if the noise is gone, secondly just leave it off because I don't use the ac anyway? Or does it drive something else as well, or maybe disturb a certain balance?

 

Sounds similar, hope that's it, not much to worry about. How did you find out it's the AC belt?