I'd change it too then.

 

This video seems misleading or at least contrary to the OP. Appears to be more by the book, than the proclaimed easy way with a 3 foot pry bar. Maybe I watched the wrong video.

 

thats the way i did it not too bad. i think some have said you can do it from below? i did replace both belts and tensioner i have 150k miles 4K+ hrs. ford tensioners went it great with the pin i wish all tensioners had that.

 

I replaced my tensioner from below. It was a tight fit getting to it but saved me time from removing anything else. I used a long 3/8 ratchet with a flex head to reach it.

 

This is more than likely the fix for anyone who has a squeak/squeal/chirping noise coming left of center on the motor. When listening and looking from the outside, it sounds like it's chirping from behind the left side of the radiator. I had read about the TSB for the idler pulley, so I did that one first(easiest). The noise did not go away. I then replaced the tensioner and belt and it's now quiet as ever, minus my 5" straight pipe

 

I think I was having the same issue as bgrsk above, except that now I don't have power steering and the batteries aren't charging. I looked underneath and as I suspected the main belt is loose, albeit not broken; something gave.

I figure it is a good idea to change the belt, the pulleys and the tensioners on this 2010 F-350 6.4 diesel. I would like to confirm a couple of things before I spend a couple hundred bucks in parts.

1. Does the AC uses a separate belt and tensioner?
2. Is the AC belt tensioner the same as the Main belt tensioner?

Thanks in advance,

Update

I found the answers to all my questions. Yes, and No, the AC belt has 6 ribs while the main line has 8 calling for a narrower tensioner pulley on the AC belt...

L

 

1. Yes the AC belt and tensioner are separate/different than the main belt/tensioner.
2. No they are not the same. You can tell if you look. The A/C tensioner is narrower.

If you are squeaking, looked for a cocked tensioner. May have to remove fender liner to get a good straight view unless you can see it good underneath. The easiest method I found to do these is pull the top half of shroud off and a long handle ratchet to release tension on belt. You will also need to pull one of the Stator mount bolts off if you are doing the A/C belt. Not a tough job, just not much room.

 

Thanks for the reply.

I have since changed the serpentine belts; the first time I've wrenched under to hood of any diesel I'm quite happy but I did manage to cut myself on the radiator so you can say that my experience was paid for in blood.

Since I was in there I changed the two belts, their tensioners and the two idler pulleys. I don't really have another diesel design as reference but I'd have to say it wasn't so easy. I can only imagine what a van would be like to work on!

The truck is back on the road and sounds so much better now. Good for another 100k I reckon.