I dropped off my car 2 days ago at my local dealer for an engine knock. My car had an oil pump failure at 33k and they suspected potential bad repair. Redid that and the sound still persisted. They said it was in the bottom end and awaited further tech support in which Alfa simply approved new long block replacement. So going back, a week after the pump repair I noticed a small engine rattle between 1-2k rpm under throttle tip in. Full throttle or above 2k noise would go away. Was more evident after long/ hard driving. Never at start up or even under heavy load. Kept driving the car for 17k miles like that (with JB4 to boot) until my last hundred miles of warranty. At first they said it was my cracked egr pipe which they did not cover. Personally fixed that (engine rattle/ knock persisted) and now they said engine getting replaced. Out of curiosity has anybody have any insight what could have been the problem? Could it have been starved of oil when pump failed? Manufacturing defect ? Had pretty bad luck with the car overall but I love it more than ever but I’m really hoping the oil pump and engine last a bit longer especially with no additional warranty. Engine always ran and performed great