Lg washer makes high pitched squealing noise when spinning

SOURCE: LG WM1812CW noise

Other than seperating the drums you could try to remove the heater element which will allow you limited access to the cavity between the drums. Shine a torch in there and rotate the inner drum slowly untill the offending piece comes into view. Remove with a long tweesers or hook.

SOURCE: lg wm1832cw front load washer

One of 2 things may be causing the loud noise.  Either the rear bearing on the drum has failed and will need to be replaced (very expensive) or the drain pump has a bearing problem and is making a very loud noise when it is draining (not too expensive).  Either way, you will need a qualified LG technician to diagnose and repair the problem.

SOURCE: noisey during spin

yes you are right noise during spin cycle is due to faulty bearing. If the tub seal lets go water will weep into the tub bearing. This will rust the basket shaft and normally wreck the tub bearing. Once the bearings starts to get worn enough it usually gets very noisy. The tub bearing is pressed onto the outer back half of the tub shell assembly. Normally need to replace the inner basket/shaft assembly  and the outer shell with the tub bearing. 
Sometimes the inner basket support will crack, this can give an clicking or banging noise as well.
 
Pictures of this job...
A sure indication was the brown junk/gookus leaking out if the rear bearing area and the belt has spewed it around in the drum that the rear bearing and seal was bad...
Picture1 - Picture2
The whole outer shell and basket come out to do this repair....what bad bearing and rusted shaft looked like...
Picture1 - Picture2 - Picture3
I had to remove the back panel. Undo the pump hose & water level hose, remove the 2 shocks, remove the motor, undo the front boot from the outer panel and remove the 2 springs to lift the whole assembly out from the back to work on it.
Picture1 ( boot pushed inside ) Help page1 - Help page2
It leaks Your washer can develop several types of leaks. You can track down a leak based on when it occurs: 

During fill only
During drain and spin only
All the time
During fill only If the washer leaks only during the fill cycle, check these:

• Air-gap device -The air gap is a small device found on most washers that prevents the wash water from being siphoned into the household water supply. It's located either mid-way along or at the end of the black rubber hose that comes from the water-inlet valve. Often it's made of translucent plastic. If one of the air-gap components deforms or cracks, you may need to replace it.



• The tube -There's a rubber tube that runs between the water-inlet valve and either the air-gap or the inlet spout. If it cracks or breaks, it can cause a leak.



• Inlet spout -Most washers have a plastic spout near the top of the main clothes tub that directs the water into the tub. If the spout cracks or breaks free of its mounting, it can cause a leak.

• Hot and cold water fill hoses - Check the hot and cold water hoses from the household plumbing. If either hose is leaking, tighten it or replace it, as appropriate.



• Main tub seal - The main tub seal is located between the transmission and the outer tub. It's the primary water seal in the outer tub for the transmission-shaft entry point. If this seal leaks, you can see the leak by opening up the machine's main access panel while the machine is full of water with a small amount of detergent in it. The leak appears at the underside of the outer tub, at or near the center. This seal is difficult to replace. You probably should call a qualified appliance repair technician.



• Pump - If the pump leaks, you can probably spot the leak when the tub is full of water. The pump has two or more black rubber or plastic hoses attached to it and usually has a drive belt that spins the pump. If the pump is leaking, you need to replace it.



• Outer tub - Over time, the steel or plastic outer tubs can rust, split, or be punctured. If this happens, you may have to replace the entire outer tub--but that may not be an economical repair to make. Consult a qualified appliance repair technician for further details.

SOURCE: LG WM0642H front load washer making a loud vibration-type noise

mc not level

SOURCE: Error code LE on LG Wm1815cs

Error OE appears after about 10 minutes into a cycle. "OE" in the manual says filter clogged....we have checked & cleaned all of the lines/filter. Now we hear a light humming instead and the washer isn't doing anything...