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I need a belt diagram/ pulleayour for 2011 6.7L single alternator.

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132K views 20 replies 13 participants last post by  FordDoctor  
#1 · (Edited by Moderator)
Well, here it is the dealer installed my brand-new serpentine wrong. Under the idler pulley and not over it, so one month later, here we are with a broken serpentine. My problem is it currently sits outside, and unless they, which I doubt, come and tow it to the shop to fix their mistake, I need to get it indoors. Without a belt, though, I worry about what is all driven by the belt. The alternator, fan, a/c, and water pump, but I'm not sure what else. I've tried to find a layout of what pulley does, but I came up empty. Does anyone, by chance, have the diagram/ image that shows what each does? I've found some for the 6.0l and 7.3l but nothing for the 6.7l single alternator 2011 as it changed in 2012.
 
#2 ·
24 month unlimited mileage warranty for Motorcraft parts. Call the dealer and tell them to fix it, ask them if they are going to tow it in or fix it in your driveway.
Don't be a jackass, but be firm.
 
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#3 ·

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#6 ·
The attachment you added showing the 6.7 liter powerstroke single alternator is incorrect. No matter how hard I tried the belt would not go on. The belt goes under the idler pulley and over the alternator and around the power steering pump. Not like the diagram you attached.
 
#5 ·
All solved found the layout. PS if anyone is curious the 2011 model only single alternator has the belt going over the top mid pulley not under it. If they or you mess up and put it under you have ball park a few weeks until it snaps and if you're lucky like i was it will happen on start and not when you're going down the road.
 
#9 ·
I am confused ;-) it happens

you have smooth side of belt on grooved pulleys in that middle image
is that just for reference on how it shouldn't be ?
No I don’t have any smooth tensioner pulleys or idler pulleys. Mine came from the factory with grooved pulleys. The belt I use is grooved on both sides. My truck is a 2011 F250 6.7 liter, maybe it’s the 2012 and newer models they decided to put smooth pulleys.
 
#13 ·
Here what I have found out. Hopefully my headache will help you avoid one. I currently have a '12 6.7 I have the book (Diesel supplement) that came with it, and spent hours playing with the routing. I assumed that the belt was wrong, or made incorrectly, and tried a Napa belt whish was 2" shorter than oem. It wasn't short enough to do the routing that the book gave me. The book is incorrect. I even did a lot of searching on Google and didn't find it. I finally found the ford site, input my vin and it gave me the second of the 2 photos. I hope this helps. There is no one way to do it, and it comes down specifically to your vin. Your vin calls out a specific belt, and the belt length determines the routing. I saw on numerous posts "this is it" and "this is the only way" I can tell you, on my truck it didn't work with the Belt that they said to use. All in, it was a 25 minute job to open the hood, replace the tensioner, and install the new belt and close the hood. the other 6 hours was reserved for checking belt length, and finding the correct routing!

772703
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#14 ·
Well here it is the dealer installed my brand new serpentine wrong. Under the idler pulley and not over it so one month later here we are with a broken serpentine. My problem is it currently sits outside and unless they which i doubt come and tow it to the shop to fix their mistake i need to get it indoors. Without a belt though I worry what is all driven by the belt. Obviously the alternator, fan, a/c, and water pump, but im not sure what else. I've looked and looked to try and find a layout of what pulley does what but came up empty. Does anyone by chance have the diagram/ image that shows what each does? I've found some for the 6.0l and 7.3l but nothing for the 6.7l single alternator 2011 as it changed in 2012.
 
#20 ·
Okay, here we go. Early 2011 f350 6.7L single alternator serpentine belt follows the same pattern as the documented double alternator, not the same as the single alternator. The route for the single alternator changed on the late 2011 forward. I have a 2011 made in 10/10, a friend has one made in 04/10 and he hasn’t snapped his belt yet so thankfully he was able to do a diagram of it. I lost my mind and spent way too long going over this and over again. This works
 
#21 ·
Aging thread but still important as these trucks age those belts should probably be changed if not already done.

I have to admit, I misrouted that belt once and it made a mess. I had to clean out rubber chunks from the pulley grooves. Not a fun thing to do. The pulleys changed after 2011 but I still remember that experience every time I am putting one on. The hard learned lessons are the one's we remember! ;) If my memory serves me right my dealer took care of it. The customer was cool about it for some reason but he was just that kind of guy. If you are wondering what this is all about, if you route the belt under the upper idler pulley, the belt comes in contact with itself at the fan drive pulley and friction takes over.