Hi,
I checked that update and it looks like I should already have it installed. Based on the Z78 specs, I have a feeling this is the 2024 update—the one that caused my engine to fail 2–3 weeks later. I don’t know for sure, but given that the car was at various dealerships between February 2023 and September 2024, and the update they performed at the authorized service center (November 2024) was quite extensive. Unfortunately, I don’t know the name of that update, but I do know which control units were updated and to which software version.
The idea that the software update might have affected the forces acting on the bolt was the first thing that occurred to me after the replaced engine failed as well :/. And it’s also a question that’s making me a little nervous about the next repair.
But Stellantis’s approach is terrible. Service manuals and procedures are more or less secret—only authorized service centers have full access to them, and here in the Czech Republic, those centers aren’t exactly eager to tackle such complex repairs in the first place. And without those manuals, you end up working a bit “blind” :/. I found a service center where, after performing a mechanical engine repair, they’ll run diagnostic checks and perform any necessary software updates. Unfortunately, we’ll have to handle the mechanical engine repair on our own. Does anyone know any details about this kind of repair? Bolt torque specifications, special (non-standard) procedures, etc.? What do you recommend replacing as a precaution (e.g., chain tensioner, serpentine belt pulleys, etc.)?
Thanks for the video link—I think we’re dealing with the exact same problem. My engine looks practically the same.
It also occurred to me whether we could somehow mechanically secure the pulley against loosening—mechanically secure it with a washer or an additional bolt. So that this defect cannot happen again. I’ve seen a reference somewhere to welding a bolt in place, but that seems a bit too “permanent” to me :).
Jan
