Which camshaft is the appropriate choice?

[Emma_Jones89]

Greetings everyone, I regret to inform you that I had a chain failure incident with my 2010 1 series vehicle in the month of December. The vehicle was stationary on the driveway for a duration of 10 months prior to undergoing repairs. Instead of taking the automobile to a professional garage, it was entrusted to a knowledgeable acquaintance. I was lucky in terms of the extent of the damage incurred, as the only significant component that sustained damage was the camshaft rail, if I recall its correct nomenclature. I procured a pre-owned item by referencing the component number of the original one. Upon repairing the vehicle, the technician made note of the widened shiny components on the camshafts, which were found to be wider than their original counterparts. The mechanic attributed this discrepancy to the suboptimal starting performance of the automobile, while noting that it otherwise operates well.
I would want to inquire if the broader reflective components would result in any detrimental effects. Is it advisable to prompt him to make another alteration? Do the broader reflective components have no impact, but rather serve as suboptimal fuel, resulting in the unsatisfactory ignition process?
I own a photograph that I will provide as an attachment. The new and old cameras exhibit identical characteristics, with the exception of the broader glossy components on one of them.
I express my gratitude to all those involved.

[Jacob_Evans2001]

The potential negative impact of a larger width on beginning performance is not readily apparent, as long as there are no obstacles that may impede the vehicle's progress.

[Emma_Jones89]

My first perspective aligns with the aforementioned viewpoint, although he has a contrasting one. The diesel that’s in it has been in it since December. It is quite probable that diesel fuel has a finite duration of storage viability.

[maryem]

May I inquire about the specific component number you are referring to? Can you confirm that it was really the same one?

[Emma_Jones89]

The damaged item in question is the one characterized by an oily appearance, whereas the one with a purple backdrop is the one that I personally procured.

[Emma_Jones89]

The vehicle in question is a 2008 2.0 e87. All aspects are accurate except for the expanded dimensions of the reflective components.

[Jacob_Evans2001]

The camshafts and their respective carriers are assigned distinct component numbers. The number 7797511 represents the airline.It is likely that the camshaft you own is the revised version. However, it is uncertain if the wider camshafts are compatible with older models.

[Emma_Jones89]

Based on the visual evidence shown in the photographs, it is reasonable to infer that the utilization of the new carrier in conjunction with the pre-existing camshafts would enable the construction of a singular high-quality unit. The only component that experienced failure in my camshafts was the prominent cog located in the rear, responsible for facilitating the rotation of the chain.

[Emma_Jones89]

Alternatively, would it be OK to maintain the text in its current form?

[Jacob_Evans2001]

The sprocket exhibits a connection to the camshaft, and it is surprising that no damage was incurred to the camshaft during the carrier's breakage.
The issue may reside in another location. Have you conducted an examination of compression?