ford escort van 1800cc
 

when accelerating iam hearing a weird noise comming from the right hand side of the engine u dont hear it when the engine is idling just when accelerating its like a (sounds daft i know) like a jet engine when driving i dip clutch to change gear sound goes off then comes bk when take foot off clutch then remains till i dip clutch again,ive adjusted and tightned alternator belt not that plz help !!!!

You might want to check the crankshaft for end ply to rule out thrust bearing possibility.