I was checking the A/C on my TL today and noticed the PS Suction hose was wobbling slightly (inlet joint on assembly pic below) and the screw holding it on was loose! I rebuilt my pump in 2019 so it's been on the car for a few years without being checked. The screw was very loose (not leaking thankfully) and I used a 10mm small wrench to tighten it back up with a tiny bit of blue loctite.




Assembly:

 

Please keep us updated if you notice it working loose again. It gets very hot in that location. Will blue loctite hold up?

I think that bolts into aluminum. Is it possible the helicoil inserts were damaged? I take it not if you were able to notice the bolt was tightening.

To add to the PSA, everyone , look at the torque spec on these! It is very easy to over torque such a small bolt.