Engine noise

[Yehoshua]

I started hearing this noise coming from my engine when I first start up my truck. It's sort of a chirping sound. The noise goes away after the engine is warmed up. I was thinking it could be coming from one of the pulleys and then goes away after the belt gets warmer and therefore stretchier. I posted a link below. What do you guys think?

http://youtu.be/Uf3cFH_6qVM

[trbankii]

I had a bit longer version of that - more of a squeal - that turned out to be the tensioner.

[Dvldog8793]

Howdy
Pull the belt and see if it goes away.
Likely it will and it probably is the tensioner.
easy fix...but buy a good one.

[Robyn]

Watching the video, I noticed that the "chirp" seems to be in near perfect sinc with when the white lettering? on the belt passes the alternator pulley.

As mentioned, yank the belt, start it and see if the noise is gone.

Replace the belt (if not fresh) and the tensioner.

[Yehoshua]

Thanks for the replies... I will pull the belt and go from there

[arveetek]

Check your crankshaft pulley. I just had a similar problem, and the rubber in the dampened pulley had broken down, allowing the pulley to rotate freely a few degrees in each direction relative to the harmonic balancer.

Casey