Chirping from Engine Bay

[krwalkman]

Hello everyone, this is my first post here even though I have had a Cherokee for some years. I have mostly just lurked and never even created a user until today when I couldn't find the issue that I am having

The issue that I am having is a significant chirping noise coming from the engine bay. I have read a few posts that say check wheel bearings/hubs and things of that nature, but I just replaced (Less than a month ago) all of that, did all of the brakes all the way around, new water pump, new serpentine belt, 2 front wheel hubs, new transmission cooling lines, D30 inner and outer axle seals, etc.

The chirping noise sounds as if it is right behind the dash, centered, if you are driving. It only chirps when under acceleration and won't when idling, even at speed. Seems the frequency changes with RPMS but again only when accelerating, won't do it in neutral.

I can get a video if I need to and hopefully clarify what I am talking about.

I have one other issue and that is a vibration that comes from beneath me when I let off the throttle and only for a few seconds. I have read up on this a bit and it sounds like maybe it is a u-joint and seems pretty typical. I will start there, but any suggestions help.

Thanks Everyone!

 

[Rockwood]

Check the converter to flexplate bolts and flexplate itself for cracking?

 

[old_man]

Behind the dash would mean the speedo cable.
From the engine bay, you have a multitude of possible culprits:
AC clutch bearing
Fan Clutch Bearing
Idler Bearings (common)
Alternator Bearings
Power Steering Bearings
Water Pump Bearings.

Loose/worn Serpentine belt

 

[chickenbot]

OP stated he replaced his serp belt..

Is the serp belt tight enough? these engines like TIGHT belts

 

[bentroia]

OP stated he replaced his serp belt..

Is the serp belt tight enough? these engines like TIGHT belts

Yep, check the tension - I've had the same problem increased tension fixed it.

 

[cwyman6]

Distributor possibly

 

[Black1990jeep]

For me the chirping went away simply by greasing the u joints, cardan joint, splines. Mine was the cardon joint. Been silent ever since. If it has not run dry for long, getting grease in there may save it. That's what I would do first, grease it, I did one location at a time, then test drove so I would know which joint was the problem.

This chirping noise is also called "Angry Bird" noise.

good luck

 

[jeep ride]

Check your harmonic balancer that was the cause of my chirping noise.

 

[krwalkman]

Yep, check the tension - I've had the same problem increased tension fixed it.

You know, that's what I was reading on another post so I will try that first.

 

[krwalkman]

Distributor possibly

I read this in another thread as well. I will certainly look into it!

 

[krwalkman]

Behind the dash would mean the speedo cable.
From the engine bay, you have a multitude of possible culprits:
AC clutch bearing
Fan Clutch Bearing
Idler Bearings (common)
Alternator Bearings
Power Steering Bearings
Water Pump Bearings.

Loose/worn Serpentine belt

That is a lot of options, but probably things that I could do and attribute it to being preventative in nature anyways. I know this thing has been beat to hell and run all over so I don't mind doing these things.

 

[krwalkman]

For me the chirping went away simply by greasing the u joints, cardan joint, splines. Mine was the cardon joint. Been silent ever since. If it has not run dry for long, getting grease in there may save it. That's what I would do first, grease it, I did one location at a time, then test drove so I would know which joint was the problem.

This chirping noise is also called "Angry Bird" noise.

good luck

I am certainly doing this as well. I didn't do a transfer case drop with the lift because i only did 4" which is supposedly the limit, but I know these U-joints don't like the new angles and such. Hopefully, since it is relativiely new I catch it time and don't have to replace them. When I did the wheel hubs and the axle seals I took out the axles (obviously) and wanted to replace the U joints but couldn't get them apart. I could not loosen the clips to get them off. So hopefully these ones would be in better shape.

Also as a funny side note, the guy that had the jeep before me replaced the drivers side U joint with a CV joint. He only swapped the drivers side of the front end , which I found dumb and ends up being a pain when buying parts...

 

[krwalkman]

Also, i chuckled a bit at the Angry Bird noise.... Isn't there a movie coming out for that?

 

[krwalkman]

Check your harmonic balancer that was the cause of my chirping noise.

I will also look into this. I need someone to just ride under the jeep while I drive and point at the location of each noise. We do this on the interior for rattles when they come up.

That's what girlfriends/fiances/wives are for right?

 

[krwalkman]

Apparently I need to get better at quoting in this forum, on Audizine it is very similar, just need to adjust and be able to quote all of you in one response.

Thanks everyone for the help though! If you have any more thoughts, keep them coming. Starting to feel like maybe I just replace everything at once and call it good. In the nature of the jeep though, that would not be the case.

 

[TRCM]

Apparently I need to get better at quoting in this forum, on Audizine it is very similar, just need to adjust and be able to quote all of you in one response.

Thanks everyone for the help though! If you have any more thoughts, keep them coming. Starting to feel like maybe I just replace everything at once and call it good. In the nature of the jeep though, that would not be the case.

Can't do that....they don't make real cherokees anymore...............

 

[old_man]

I got a serp belt that chirps once per revolution. As it turns out, they coat the surface where the label is printed. It chirps each time it goes around. I plan to take some sand paper and rough it up.

 

[Number21]

Distributor possibly

I had this problem on my '98. At first it was just occasional chirping, couldn't track it down. After a while it became constant when cold, it was definitely the distributor. I tried changing the cap/rotor but had no effect. It was very slowly getting worse but I never fixed it in 10,000+ miles until I wrecked it. :smsoap:

Seemed to get a lot better when I used 10w40 oil vs 5w30.

 

[cwyman6]

I had this problem on my '98. At first it was just occasional chirping, couldn't track it down. After a while it became constant when cold, it was definitely the distributor. I tried changing the cap/rotor but had no effect. It was very slowly getting worse but I never fixed it in 10,000+ miles until I wrecked it. :smsoap:

Seemed to get a lot better when I used 10w40 oil vs 5w30.

Should be using 10w30 or 10w40 it hot weather

 

[Number21]

Should be using 10w30 or 10w40 it hot weather

Or whatever you have a big pile of already. :dunno: 5w30 is definitely one of the grades specified in the manual, though I agree they like 10w40.

Last oil change I used Delo synthetic 5w40, and the engine sounded quite nice with lots of hot weather driving.