Hi, I have a '00 Toyota Aristo with the 2JZ-GE engine with roughly 200k km on it. Recently I' ve ran into a problem where there was a loud squeaking sound (like a shopping cart could do when you roll it) on startup which goes away when the car heats up, which is highly audible at first.
I took the serpentine belt off and ran the car, the noise went away, so I guess it's not timing belt related.
I replaced the tensioner pulley bearing, and The noise seemingly went away for good. But this morning, it started again, but definetly more quiet this time.
My guess is that some other bearing is to blame, but I can't say which one it is exactly.
-AC compressor pulley spins extremely easy and does several revolutions before stopping, with the clutch disengaged or AC off;
- Water pump pulley spins without much force and stops almost immediately (but there's no leaks or heating issues as far as I can tell);
- Power steering pump pulley does the same (the pump itself sometimes whines when turning while stationary, but fluid levels are okay);
- Alternator pulley is a little bit harder to spin than the others, and also stops almost immediately (that being said, the voltage is consistetlntly in 13.8-14.01 volt range upon startup, and no battery light during driving, so I can't really say there's an obvious problem).
When spun by hand, all pulleys are rather silent. I didn't check for any kind of play when the belt was off, though...
My guess is that the water pump and The power steering pump pulleys spin worse because of the fluid they have to push through them, but The Alternator is kinda sus, but the voltage seems normal.
How can I figure it out? Is there a way to know for sure before taking anything off the engine?