3g belt length

newskool · Apr 29, 2012

What length belt is needed when you upgrade to the 3g alt? Mine seems to be a couple inches short even at full release of the tensioner.

David Pepiton · Apr 29, 2012

whats the diameter of your pulley?

newskool · Apr 29, 2012

Gearbanger 101 · Apr 29, 2012

Your belt length shouldn't be any different than what's on there now. a 2.75" alternator pulley diameter is close enough to stock that it isn't going to change the length of the belt any. There should be more than enough slack in the tensioner to take it up? Have you made any other changes? Underdrive pulleys? A/C, or smog pump delete?

David Pepiton · Apr 29, 2012

Also if you have factory or dealer ac it could make a difference.

newskool · Apr 29, 2012

factory AC. no other changes. The previous belt was a PITA to get on and took my and my brother-in-law to squeeze it on.

David Pepiton · Apr 29, 2012

How about this just minus 2-3 inches from your current size and get that. Or measure out a piece of string.

newskool · Apr 29, 2012

David Pepiton said:
How about this just minus 2-3 inches from your current size and get that. Or measure out a piece of string.

did you mean add 2-3 inches? because going shorter won't help.

srtthis · Apr 29, 2012

Mines 39" but it was 39" before the 3G also

David Pepiton · Apr 29, 2012

yeah stock is a K060905 and thats about 91" outside diameter of the belt.

Gearbanger 101 · Apr 30, 2012

Don't add any more than 1/2"-1" to your belt length. If you go "2+ inches, I guarantee that your tensioner won't take up the slack. You want that sucker nice n tight.

Also....different manufacturers belts will vary in length....even if they're stated to be the same. I'd buy a couple of each and keep the one that fits best. Remember....don't run the car with the belt on, unless you plan on keeping it. They may not allow you to return it if they see signs of use.

newskool · Apr 30, 2012

Thanks everybody. Anybody have a parts number for a 92-93 inch belt?

newskool · Apr 30, 2012

I think I'm gonna try this one. seems to be about an inch or so longer than the stocker. Man I hope this works.
http://www.oreillyauto.com/site/c/d...=Search_C0074_1433659_3884&pt=C0074&ppt=C0007

David Pepiton · Apr 30, 2012

get the Gates version of that belt that belt is 1.25 inches longer then what i posted.

newskool · Apr 30, 2012

SO I just bought the one I linked to when I was at lunch. I'll let you guys know how it works when I get home tonight. Really hoping this works.

newskool · Apr 30, 2012

well that belt didn't work. it's the same damn size as the one i had apparently. any other suggestions?

Gearbanger 101 · Apr 30, 2012

newskool said:
well that belt didn't work. it's the same damn size as the one i had apparently. any other suggestions?

You could always try this....

http://www.stangnet.com/mustang-forums/threads/3g-belt-length.856328/#post-8614329

newskool · May 1, 2012

Got it. Wound up doing it the hard way which eventually lead me back to gearbanger's post.

David Pepiton · May 1, 2012

you could just buy a bunch of belts and return what you dont use.

Gearbanger 101 · May 1, 2012

David Pepiton said:
you could just buy a bunch of belts and return what you dont use.

Why didn't I think of that?

3g belt length

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