[ours2012]

Can you get the belt off and check,, not dropped something down the impeller ..( the part just behind the pulley)
Just asking, have been there and done that, small washer.
Not noticed for a few days,,,,

 

[ours2012]

Magnet would find it, that is how small the particles can be.
But not much point checking, if you have cut it open, blade of the hacksaw, leaves behind metal.
Start your engine, let it idle, long reach screwdriver, and very very carefully , touch the body of each unit, not the pulleys, you will feel it..
If your car is fitted with air con, and you can see the pulley, have a look,.
See if you can see any cleaner than normal metal showing, ( nice and shiny )
Be careful if its aircon, these pieces of metal can be extremely sharp, and cut your fingers very easily .....

 

[ours2012]

Two parts, one fastened to the body,,,( inner part )
I think with 3/4 pins, The outer casing, could be held on with pins, or one section slots into the other,, and two pins down the side this is part of your car,,, not a kwik fit special
These together hold your fuel filter ...
No idea why there would be a jubilee clip there,,,will say no more:laugh::laugh::laugh::laugh:>