warrenoliver

Getting set to replace my serpentine belt on my 2007 5.4L because I don't know when it was last replaced and it looks like the edge is beginning to fray. From searching the archives, I see that some advise that I replace the idler pulley at the same time. My question is - which one to replace? It looks like there is one directly above the tensioner pulley and also one on the driver's side just above the power steering pump. I suppose I can replace both but is there one that is more prone to causing problems.

nrivera04

There should be 3. 1 grooved and 2 smooth. If they spin freely and have no wobble or noise to them, I'd let em ride and just change the belt. Check the tensioner pulley also.

Tommy J

Maybe they meant to replace the whole tensioner because it too can ware out because of the constant tension on the spring. I know there are tensioner marks to go by to see if the belt needs replacing but not sure how to know if the tensioner is worn. Maybe the 3 pulleys good enough though

Dirttracker18

Just check them as noted in the previous post. It only takes a minute to loosen the belt enough to pull it off the pulleys.

Check all of them, if suspect at all, buy a new pulley or bearing along with your belt. Pull the belt back on and go get your new parts.

techrep

iTrader: (1)

What is causing the belt to fray ??

Tommy J

Age, mileage