2000 Toyota Mark - User Documentation New Guides

My car is making bearing like noise just like pink...but the noise is not constant. It only appears when the start of acceleration occurs between 1500-2000rpm. The noise is coming from the front of engine, timing belt cover. Following have been done to resolve with no luck. 1. we jacked the back tire and race the car on drive ** no noise** 2. Neutral rave no noise 3. cleaned all plugs 4. cleaned all nozzles 5. fuel cleaner added When starting the car in the morning there is no noise as soon as i put on drive, and rave to 1500 rpm a noise like dry bearing comes from the hood of the car. So i put the car on drive, hold down the handbrake, and the brake and rave the car to 1500rpm and hold... the noise is there... this noise is really ennoying and getting louder day by day... any suggestion on what it could be