awd a/t 131,000 mi , noise in rear drivers side, thinking it is wheel bearing, but when i apply brakes noise goes away, also rotor is getting groved out, ? so bad caliper pads ?

rear bearing

 

rusty/bent brake parts (dust shield) are rubbing. having the rotors turned or wiring brushing them will alleviate some noises like this. really need to remove the rotor and get the inside tract as well where the e-brake drum brake bits are, and that seems to be where noises like this come from the most for me.

ok, rear disc, thanks

doing some reading seems easier to replace whole hub/ bearing

ok, rear disc, thanks

right - rear discs have DRUM brakes and shoes for the emergency brake inside the rotor of the "disc brakes". if you don't know what i mean, remove the rotor and you'll see. when there are rusty lips and ledges in the rotor they rub and cause noises. wiring brushing or having them turned will fix it.

 

or it's the wheel bearing. replacing the hub isn't a terrible idea though if you've never had at those rear lateral link bolts be prepared for a nightmare if you don't take some precautions. around these parts they rust and corrode in the bores/sleeves and shear off easily. they are no fun to remove. soak it a long time in the best rust penetrant you can find.

 

if you have a temp gun you can verify bad wheel bearings by hitting the hub after a long drive - that side will be consistently hotter than the other.

yes, but thinking about scrapping it out since the popping noise in motor and will need alot of work $$$$,buy another subaru