The aircon pump pulley bearing is worn out and grumbly but I've had enough of replacing compressors just for this, with all the faff around emptying and refilling the system. So, replace the bearing...
The pulley is just held on with a circlip so slides off easily enough
The bearing is pressed in and then staked to make sure it doesn't come out
The usual contrivance of round chunks to push the old bearing out
and to push the new one in
This can be swapped for the one on the car after the engine is back in
I pressure washed the subframe. Its in very good condition with a little surface rust
I'll clean most of this with a wire wheel and then paint with rustoleum