[381hpbeast]

My 07 5.7L now has 125k miles on it.
Maintenance is usually on point with oil changes and tune up
just recently had both wheel bearings replaced because they were drying up. (that worked out fine)
have been hearing a loud squeal (very noticeable) from the engine so i read about it and had the serpentine belt changed because it was getting pretty dry (2nd time changing it), that DIDNT seem to help so i read a little more online and they said it was the belt pulley tensioner, because the belt might be loose, so i went ahead and had that changed too but that didnt help.
the squeal isnt always happening it usually happens in between gears when giving gas between 2-3k rpms.
Any ideas what it could possibly be???


also does anybody have any dash squeaking going on?
i would like to fix all these problems to keep her going for a little while longer as i dont really want to start making payments all over again.

Any info would be appreciated!

 

[FL_Tundra]

The squeal can still be coming from your serpentine belt. If you have had the belt tensioner and any other idler pully's (sp) replaced that are other things that it could be. It is "possible" that the bearings in one of the following is going bad and causing the belt to slip at times and make the noise you are talking about. The potential culprits could be your A/C compressor, alternator, power steering pump, and possibly the water pump. Not saying that one of those is the problem, just could be. It is very difficult to try to diagnose a noise without being there to hear it. You might want to take the truck to a trusted mechanic and let them diagnose what is causing the noise.

 

[thebigswede]

I had a similar problem. I had a "squeal" that was very difficult to pinpoint. I tried belt conditioner,even though it is a new belt, that did not work. So after a little time thinking about it, I decided to look at the power steering fluid. It wasn't low, but when I checked the color it was a nasty looking reddish brown. After reading the cap and seeing it is automatic trans fluid, I decided I would empty the reservoir, refill and wait for the results. The squeal went away, but came back 1-2 weeks later. So I repeated the process. I have done this 2 or 3 times using a good quality fluid. By doing this I basically did a gradual flush of the power steering fluid system. Now the fluid has a nice red color and no squeal for several months.