Toyota Corolla Timing Belt Tensioner Replace/Remove

I Have A 2003 Toyota Corolla Ce 4cyl Car With 79k Miles On It. I Went To The Toyota Dealer To Get The Inspection Sticker And Regular Oil...

The Tensioner Doesn't Seem To Be Tightening The Belt Enough. I Don't Want To Change Belt Or Water Pump If I Don't Have To. Is It Possible...

Just Replaced Timing Belt And Tensioner,my Last Tensioner Desinagrated,so I`m In Time,i`ve Got Spark,and I Smell Fuel All Over Spark Plugs...