[azzura]

Curiously/annoyingly the ePer parts catalogue shows a different part number 55284051 but no indication of any change over time. It is common to very many other Fiat models as well as Alfa Romeo and Lancia. I don't know why the US Mopar catalogue sometimes has completely different part numbers.

 

[jackovheartz]

This type of stuff has been in my business profile for almost 40 years, not cars but IT.

Part number changes can be significant, subtle or merely an indicator of where the part was sourced from but otherwise exactly the same. You wont know unless you have a deep knowledge of part number generation within the organisation.

 

[60KG]

Got my 2018 Classica back with new water pump and hose, two weeks total to get parts and install, supposedly they worked on it two days straight once the parts came. No issues, other than a little dirt on the door panel from getting in and out and dirty from sitting outside for that long. Dealer did call me to make sure I hadn't added the wrong coolant, and it came back filled to the mark with the same color green so at least that should be good. Overall better experience than the dealer I bought it from, although I will still do my own oil changes.

 

[SteveP.]

Re: to Dancap, Sorry I didn't get back sooner. Here are my thoughts after listening to the sound clip: There is a "secondary electric water pump" that is controlled by the ECM and is turned on after the engine is shut off so as to continue to circulate coolant through the turbocharger and thus prevent heat damage to the turbo. What it sounds like from this 'puter is that there is air in the cooling system that hasnt been bled out since the water pump replacement. (i.e., electric water pump is cavitating). If in fact that is the case it isnt good and should be remedied. I would recommend doing it as soon as possible if you can, or return it to the dealer and have them do it ASAP. The other possibility I can think of is the electric water pump itself is faulty. Again, not good and needs to be fixed. I believe what you should hear is a "steady electric motor humm" for about 2 minutes after shutoff as my car does. Being a "Mainah" my car is now in storage until spring and I cant record its sound now. Hope this all helps, Dancap, wishing you success in resolving the issue. Please let us all know the results. s.