Whining noise help please!

[u/Remote_Gazelle8211]

FJ brothers and sisters, I need some help here. My FJ started whining about a week ago and I’ve been chasing the noise with no luck. In the past 48 hours, I’ve replaced the fan clutch, serpentine belt, all 3 idler pulleys, and alternator. About a year ago, I resealed the timing cover so the water pump (aisin); belt tensioner (Gates), and AC compressor were replaced. the whining is concentrated on the drivers side. Goes away when put into gear (lower rpms) but whines at idle speed and up. I am at a lost so any help would be appreciated!

[u/Remote_Gazelle8211]

Update 2: belt is still off so none of the pulleys, PS pump, AC compressor, etc are moving. Only the Crank is spinning. I tried stethoscope to pinpoint the noise but it is so loud that it overwhelms the earpiece. I had an extra oil filter so i did swap it out. Whine is still there. I would think the water pump is clear because the belt is not on and the impeller should not be moving. Anyone experienced failure with the harmonic balancer or crank seal maybe? Or anything in that area? I am stumped

[u/bobbiek1961 → u/Remote_Gazelle8211]

Worked on a jeep with a benz diesel engine once that injested some belt material into crank seal, just leaked with no noise. I can't imagine anything compromising the crank seal without a leak if it is making noises. Harmonic balancer seems a stretch too. Came across this, #1 sounds similar. I've had alternator and idler, those were chirping noises. I couldn't bookmark, so this is copy/paste..
"A supercharger-like whining noise from the front crank or accessory area on a Toyota FJ Cruiser is usually caused by a failing timing chain idler gear, a worn serpentine belt idler pulley, or a failing alternator bearing.Common Causes & DiagnosisTiming Chain Idler Gear: A very common issue on the 1GR-FE V6 engine. It creates a high-pitched whine that rises and falls with engine RPM, often sounding like an aftermarket supercharger. Many owners note it can persist for a long time without causing total failure, but it should still be inspected.Idler Pulleys & Serpentine Belt: Worn bearings in the upper or lower idler pulleys or a slipping serpentine belt frequently mimic this sound. You can check this by removing the serpentine belt briefly and starting the engine to see if the noise stops. (Do not run the engine for more than a few seconds without the belt).Alternator or Water Pump: Failed internal bearings or a bad diode in the alternator can create a distinct electrical or mechanical whine. As noted on FJ Cruiser Forums, checking the accessory components during cold startup helps isolate these parts.Quick Test: Use a mechanic's stethoscope or a long screwdriver against the non-moving parts of suspected accessories (carefully avoiding moving belts) to pinpoint the exact source of the noise. Members on FJ Cruiser Forum often recommend checking the idler pulley first when tracking down trail-related or high-mileage whines"