evh Posted July 8, 2019 Report Share Posted July 8, 2019 See the attached pictures. My 2016 AWD SEL Edge with 37,000 miles (of course, just out of warranty) just developed a rattle under the hood. The part I am pointing at rattles sometimes (you can see and hear it rattle). Sometimes it stops. My guess is it is the idler pulley or possibly part of the air conditioner. Looks like the belt is attached to it or runs under it. I watched it rattle and then stop (i.e. air conditioner clutch rattling when it grabs and stops when it releases?) Note, air conditioner works fine. Thanks ahead for any help Quote Link to comment Share on other sites More sharing options...
evh Posted July 9, 2019 Author Report Share Posted July 9, 2019 I did some searching, it is the belt tensioner. See pic. Quote Link to comment Share on other sites More sharing options...
Bfazona Posted July 9, 2019 Report Share Posted July 9, 2019 I have heard of tensioners going bad on these engines. When I replaced my serpentine belts, I also put on a new tensioner as well. My old one definitely had some wobble to it. Is it just the pulley that is wobbling or the entire thing? If the whole thing is moving, I would check the bolts. Perhaps they are loose for some reason. If not, a new tensioner is your answer and it is relatively easy to change, just tight getting to the bolts. 1 Quote Link to comment Share on other sites More sharing options...
evh Posted July 9, 2019 Author Report Share Posted July 9, 2019 It seems like the whole thing wobbles. Based on the picture I posted, are there just two bolts at the top? Quote Link to comment Share on other sites More sharing options...
evh Posted July 10, 2019 Author Report Share Posted July 10, 2019 The bolts were not loose, the spring/idler wheel would jiggle when the air was turned on and it would make a rattling noise. I replaced it with a new Ford part. It still jiggles when the air was turned on, but there was no rattle. Lots of fun getting the belt back one. Tip - Remove the guard you remove for changing the oil and work underneath as well as on top. Finally got it. Quote Link to comment Share on other sites More sharing options...
Bfazona Posted July 14, 2019 Report Share Posted July 14, 2019 The stretchy belt is even more fun. And the belly pan cover is missing on mine, so one less thing I had to remove. Glad you got it figured out though. Quote Link to comment Share on other sites More sharing options...
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