Sleeper

Alright, flame me later for this newb question but as usual I searched and every topic was non-related. I havve this whine, similar to a PS whine, that increased with RPM which I thought for sure was the TBelt. Had that replaced, which turned out to be a good thing since it had a stress crack along its width, but the noise persists. I see no leaks on the PS unit and the fluid appears normal. What could be the cause? It's not a high pitched whine but more of a groaning whine (wtf?) THe sound doesn't change when I move the steering wheel, only as the RPM increases. I have no loss of power either. I remeber it started on Coyote Canyon (SoCali) in one of the rock gardens. Any ideas or suggestions would be appreciated. TTORA hasn't let me down yet.

What I really need is someway to get a soundbite on here so diagnosis would be easier.

Thanks in advance..........

EWAYota

pulley bearing?

JC_ez

I have an annoying whine as well that increases with RPM. I used the poor man's mechanic stethoscope and the noise is clearly coming from my alternator. I'm guessing it can be a worn out alternator bearing or a damaged diode in the rectifier.

At idle, the whine gets noticeably louder with increased electrical load such as turning on my low/high beams and fog lights.

Sleeper

Not the case with mine but I did come across this video of someone that apparently fried their AC compressor bearing after some water crossings.

http://s8.photobucket.com/albums/a2/...t=MOV02712.flv

This is the identical noise mine is making and come to think of it when I crossed the third water crossing at Coyote Canyon the water was coming over the hood and I may have very well fried the AC bearing at that time.

fr3533

i have the exact same noise, i drove through a street with about 4ft of water, mine has been doing this for about 6 months, the ac is cold, but annoying as hell, can you replace the ac compressor bering.

Yukon

Mine made a similar noise, and while trying to isolate, I un-tightened the AC compressor idler pulley, and it went away, no new compressor needed.

KONASTAR

Was this groaning noise present before you had that t-belt replaced?
If it occured after, it might be a good possibility that the t-belt tensioner is putting a little to much tension on the t-belt.

Mike

_______________________________

85 Toyota p/u 4X4 std. cab
(too damn powerful)

99 Toyota 4-runner 4X4 (wifeys)
E-locker, 4:56, std.

69 Jeepster commando 4X4
(27k original miles) my daily driver

KONASTAR

Did another t-belt and 90k service interval on a 2001 4-runner 3.4 V-6 today.
And the t-belt sang a song... i think the noise is called harmonics. i just tried to take-up a little bit too much slack in the belt at the tensioner itself.
And i was'nt about to take the tensioner all back out again cause' one of those bolts are a pain to get to.. ha!
But the jobs done and there's goes another happy toyota owner!

Here's a peek of the job in progress.

ugadawg95

I am having a similar issue. Only mine ONLY happens while in gear D, 2, 1, or R. It increases with RPM. I flushed my tranny 2 weeks ago and it seems to have started then. I haven't noticed any problems shifting or anything like that. Should I be worried? My mechanic told me to try some Lucas Transmission Additive...didn't help. Since it only happens in gear, I am guessing it is the torque converter? Any ideas?