Ok folks. Need to replace alternator. When I pulled on the belt to set the lock on tensioner, it moved a little bit, but, when I let go of the belt to get a better grip, the tensioner did not spring back like it should. Am thinking new tensioner is needed.

First, it looks easy to remove.

Second, want to verify part number. 3c2z6b209aa

Thanks

Sean

 

Well, NAPA Liked that number.

 

The Motorcraft number is BT70, about $20 less then the blue box item. It sounds like pivot was hanging so maybe you weren't getting the tension.

 

Looks like you got the tensioner Sean.

If you still have an idler pulley issue my records show the bearing numbers to be:

smooth idler pulley bearings - 6203-2RS
grooved idler pulley bearings - 6303-2RS

I haven't done it but my notes say that you may have to drill some rivets and replace w/ bolts

Grooved Idler pulley (F-series) w/ single alternator 03-07 - # 3C3Z-8678-EB
My notes say that Dayco is the OEM supplier possibly P/N 89057 (90mm x 37.5mm 8 groove)

Lastly, my notes have a question mark by this one, but I THINK the Smooth Idler pulley (F-series) w/ single alternator is 7C3Z-8678-B.

Hopefully you don't have an idler pulley issue though!

Have you tracked down the burnt wire smell?

 

Well, napa one was a bust. My son brought it over and it doesn't have the kick stand.

As for burnt smell, nope. Once I lost charging, the smell never came back. Been looking at all the wiring, haven't found anything yetis

 

Real good chance it's the two grey 12ga fusible links between the fusible link splice coming off the pass batt and going to the alternator post. Second choice would be the smaller fusible link from that splice that goes to the connector on the alternator, the sense wire, to tell the regulator how much to make the alternator work.

 

This is not fully active on YouTube but depending on your knowledge, may help or be a waste of time.

 

For the tensioner, Dayco supplies oem IIRC. P/N 89313 I believe.

Probably too late, but maybe not. Not sure if it has the lock on it or not though.

 

RockAutos picture of the Dayco unit shows it to have the kickstand. Mine was lost a long time ago.

 

Well, ended up at Ford.

Thank you for the video Jack. I hadn't thought of the cable. While I was at Ford, I asked about the cable from the alternator to battery. I didn't realize it is all one cable from alt to passenger battery to driver battery to starter to solenoide.

They want $128 for it. Thankfully it tested fine.

Everything is back together and working great!

Thanks for every ones help. Thanks for those part numbers Mark, the idler pulley seems fine, I left it for now.

 

Just an FYI. You can take the question mark away from that note. That is the correct part #. Just changed mine.

"KIT - TENSION PULLEY
Part #: 7C3Z8678B
$34.30"

Price is from White Bear Lake

 

Thank you!

 

By the way, the part number for the new cable is

3c3z-14300-ca

 

I bought that cable from RockAuto to take measurements, and with the 5% discount it was $62, FYI in case anyone is ever in need of one.