Ford Powerstroke 6.4l Serpentine Belt and Tensioner Replacement

Ford Powerstroke 6.4l Serpentine Belt and Tensioner Replacement

Very detailed instructions on how to change you Powerstrokes Serpentine Belt. I hope this helps!

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lavalleyk says:

Thank you for a great video… my wife went to leave the driveway this
morning and had no power steering or brakes… I knew it was the serpentine
but we live several hours from the nearest garage and or Ford … I was
able to get the parts delivered and your video has helped me with every
step to replace both the tensioner and the belt… Thanks for a well
detailed video

Lukas Valent says:

Great vid thank you. I didn’t see the need to remove cable from fan. My
tensioner was broken just like yours but belt never came off but if it did
is there a possibility that it would just hit the fan and make a real mess?


k80parcours says:

That’s for the idler, what’s the part number for the tensioner? Should I
replace both, or better yet have the dealer replace both? I get the
chirping when first started in the morning, then goes away.

k80parcours says:

Here’s what part no. are the belts: 7C3E-8620-CD – Alternator Belt
7C3E-8620-FB – AC Two tensioners… So, are they the same? And how the heck
do I get to the AC belt?

Rene Del Rio says:

Very Good Video I’m about to replace belts on 2 F-550’S But since i’m gonna
be that far in there I’m replacing both Belts and Both Tensioners THANKS
FOR THE DETAILED VID

k80parcours says:

OK Thanks. I just noticed that I have two belts! So that means I have two
Tensioners. Are they the same? Are the belts the same?

k80parcours says:

Great video! Thanks for posting. need to perform this service on PSD.

FordTechMakuloco says:

Thanks!

k80parcours says:

What’s the part number for the Idler?

FordTechMakuloco says:

revised idler is on driver side top and is only for 2008 vehicle made
before 11-9-2007 part number 7C3Z-8678-B

FordTechMakuloco says:

I would replace the belt and tensioner. I have never seen the revised idler
fix anything. Its easy enough just watch my video as you are doing it. As
for the tensioner there are multiples. It is best to have the dealer look
it up by your vin.

FordTechMakuloco says:

Ford Part number AC3Z-8620-A Motorcraft Part Number JK8872D This new belt
seems to fix it, different design.

Haley Nowicki says:

could’nt of done it with out your video to make it easy and the christian
music background to help the project go easy. God Bless

Don Rapley says:

awsome help you rock!!!!

k80parcours says:

What’s the belt part number for a single alternator 6.4 F250 Job 2? I’ve
researched and found several different lengths.

FordTechMakuloco says:

Thank you!

FordTechMakuloco says:

2 different tensioners BT90 BT91 are the part numbers I am sure they
changed already but dealer will order latest part. In order to do the a/c
belt and tensioner you have to pull the front regular drive belt and
tensioner and explained in this video, plus cooling fan stator. Then they
are literally right there for ya!

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