I just changed timing belt, water pump, idler, tensioner, (those are kits from Gates) p/s belt and alternator belt on my 2002 CL Type-S. after all done, there is a noise of fixed frequency coming out of the engine. All the marks are right one. I tried pull drive belts off to see if there is any change, Nothing.

I did some research, there are some guess on the internet saying

1. timing belt is too tight, but it is not adjustable right ?
2. belt guide is backward - that is checked.
3. belt alignment -- I don't understand how this could happen

do anyone has an idea what could be the problem?

 

Better description of noise?

 

^^^WHAT HE SAID^^^

Where is the noise coming from on the engine...upper, middle, or lower portion?

Does the noise appear to be in unison with the engine RPM, belt speeds, maybe a speed of its own?

Is it loud, soft, harsh, metallic, etc?

How does the engine run? Any misfires or loss of power noticed/detected?