hard to explain noise coming from front end

[jory1978]

hi I'm new to the forum and I'm having a hard time identifying where a particular noise is coming from under the hood. It's a Ford Explorer 1999 5.0 liter engine v8 awd. I looked on several other websites and it always says the same thing that this squeal-like noise is coming from the pulleys and/or belt but this sound is not quite as high pitched as a squeal but it is a constant, repetitive, metal sounding squeal. this noise only happens when the engine hasn't warmed up to the normal operating temp. and I accelerate it makes the noise until I slow way down and then it stops, then it does it again when I speed up. Finally once the engine is warmed up I don't hear it again. What else could be causing this besides the pulleys and belt?

 

[zukman]

Check your water pump, did you try belt ease to see if its just a dry belt? Also check alignment of pulleys

 

[swshawaii]

Remove the serpentine belt and physically inspect for wear. Check ALL (8) pulleys for binding or tightness by turning.

https://www.scribd.com/doc/264849536/belt-8212-5-0l-removal-and-installation-pdf

https://www.scribd.com/doc/264849747/Accessory-Drive-Description-and-Operation

WHY BELT DRESSING IS NOT A SOLUTION TO QUIET A NOISY BELT
http://www.daycoproducts.com/why-belt-dressing-is-not-a-solution-to-quiet-a-noisy-belt

 

[jory1978]

Well I'll try what you both have suggested and see if it helps. I'll update when I get done with it. Thanks

 

[ranger7ltr]

Mystery noise...

Can also be a tensioner going bad...I once replaced a power steering pump for a noise I thought was coming from the pump but turned out to be the tensioner...

When you pull the belt spin the tensioner pulley and see if it makes any noise... If it does change it...

 

[1998Exp]

The most common culprit is indeed, the belt. If it hasn't been replaced in a long time, it may be stretched beyond the tensioner's compensation range. The best way to check is probably to compare the length of your belt to that of a new one, but if you look closely, you'll see a an indicator on the tensioner. If it's close to the end of travel, the belt is overstretched.

 

[4DoorFord]

I remember when I had to replace the camshaft synchronizer in my 5.0 at first it would only make the noise when it wasn't completely warmed up and I noticed it more while accelerating. After a while though it would do it at stop lights when I was idling.

If you can get the noise to occur on startup before the truck has warmed up, I'd remove the belt and start it up to see if the noise still occurs. If it does, then it shouldn't have to do with the pulleys or the belts. I learned this after spending $$ on the tensioner and idler pulleys as well as a new belt lol.

If you believe it might be this, here is the most helpful thread regarding that issue
http://www.explorerforum.com/forums/showthread.php?t=161590&highlight=cam+sensor

I believe the part I used and what was recommended was Motorcraft Part #DA2090 but you might need the sensor or tool from the Dorman kit. I know I remember renting the tool needed from AutoZone.

 

[BrianLWheeler]

hi I'm new to the forum and I'm having a hard time identifying where a particular noise is coming from under the hood. It's a Ford Explorer 1999 5.0 liter engine v8 awd. I looked on several other websites and it always says the same thing that this squeal-like noise is coming from the pulleys and/or belt but this sound is not quite as high pitched as a squeal but it is a constant, repetitive, metal sounding squeal. this noise only happens when the engine hasn't warmed up to the normal operating temp. and I accelerate it makes the noise until I slow way down and then it stops, then it does it again when I speed up. Finally once the engine is warmed up I don't hear it again. What else could be causing this besides the pulleys and belt?

Hello, everyone. Brian from Dayco here.

This sounds like a classic case of misalignment. Misalignment is the No. 1 cause of belt noise. One method to determine if the noise is a chirp or squeal is to use a water squirt bottle and spray the rib side of the belt while the vehicle is running. If the noise gets louder, it’s a squeal. If the noise goes away, it’s a chirp. From there, you'll then be able to best determine the cause of belt noise.

The actual belt is rarely the cause of belt noise. We have a video on YouTube about this topic. Hopefully this helps:

https://www.youtube.com/watch?v=rwtLj_2SMNw

Brian

 

[Turdle]

Here ya go. Follow my suggestions here

http://www.explorerforum.com/forums/showthread.php?t=161590&highlight=chirp+squeak

 

[4DoorFord]

Here ya go. Follow my suggestions here

http://www.explorerforum.com/forums/showthread.php?t=161590&highlight=chirp+squeak

Its the same link I posted above. I didn't realize that was your thread. Very niiiiiice.