Creaking rear Moog CC627 springs

I've had creaking coming from my 1.5" HA rear bar. Really had to tighten the bolts quite a bit beyond factory torque values to stop. Also I've notice some of the springs pigtails tend to be tight on the perches. And/or worn through the isolators. Some won't even fit with the isolator in place. I'd give those a shot of WD-40 to see if it helps temporarily.

Thank you @91ss Im going to try to tighten the swaybar bolts down.

I tightened down the rear swaybar, still creaking not as severely. I noticed that once the car warms up, the creaking subsides somewhat. May be its just the metal in this thick @$$ bar. Im not sure.

How tight did you go? The number 90 ft-lbs sounds familiar to me.

Also, at some point I welded nuts into the u-channel as the stock 'punched' hole may give out.