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Old 01-29-2012, 01:35 AM   #1
rubrduk
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Default Alternator belt kicking my a$$ - i feel stupid

06 WRX wagon minimal mods, Stg 2 - 56k miles

so i'm replacing both of my accessory belts...the AC belt was looking rough and the alternator belt was shredded very bad (very bad!)

sooo...i hit the parts store, grab some Gates Micro V AT belts and cross reference the part numbers myself to make sure the counter jockey is correct


The AC belt goes on easy, but the alternator belt seems like it's a 1/2" short - it is Gates K050345 / 5PK880


i have completely loosened the alternator adjuster, and pushed it down so it would be completely slack and the belt won't even go on - this is a dumb 20 minute job...i'm at my wit's end. What am i missing?!
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Old 01-29-2012, 02:06 AM   #2
04wrxhart
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Maybe you've mixed the two belts up ? I've taken them both off at the same time only once and that was a while ago, i recall one being a little smaller.
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Old 01-29-2012, 02:10 AM   #3
rubrduk
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Quote:
Originally Posted by 04wrxhart View Post
Maybe you've mixed the two belts up ? I've taken them both off at the same time only once and that was a while ago, i recall one being a little smaller.
yeah, i checked that...the AC is 4-rib and the alternator is 5-rib
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Old 01-29-2012, 04:23 AM   #4
Uncle Scotty
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sometimes ya gotta roll the belt on...turn the crank pulley as you push the belt on

or you got the wrong belt

i did mine not too long ago and they went right on pretty easy
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Old 01-30-2012, 04:49 AM   #5
bamf3000
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I had this issue when I replaced mine not too long ago. I swear the belt is too small. I had to REALLY force the belt on while it was loose. It shouldn't happen unless tightened.
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Old 01-30-2012, 10:12 AM   #6
SHOfast
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If it is taht hard to do you likely have the wrong belt. Compare it to the old one to make sure it is very close.
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Old 01-30-2012, 03:34 PM   #7
geronimo81
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First belt was shredded.

OP - What shredded it in the first place?
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Old 01-30-2012, 05:51 PM   #8
rubrduk
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Quote:
Originally Posted by geronimo81 View Post
First belt was shredded.

OP - What shredded it in the first place?

age, time?

i've never seen anything like it...56k miles, never touched before - it had literally fallen apart

i'm getting my 60k done here in a couple days so i'm gonna have the mechanic go through everything and sort it all out...a proper fix, fill, flush, repair, replace...all the worn and breakable crap
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Old 01-31-2012, 09:26 AM   #9
Big-E
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The 345 is the correct belt and it is 'short'.

As Uncle Scotty said, and to paraphrase, you have to 'walk' the belt over the pulleys. You do not use any type of prying device (e.g. screwdriver; prybar; etc.) to force the belt over the pulley(s).
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Old 01-31-2012, 08:26 PM   #10
rubrduk
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Quote:
Originally Posted by Big-E View Post
The 345 is the correct belt and it is 'short'.

As Uncle Scotty said, and to paraphrase, you have to 'walk' the belt over the pulleys. You do not use any type of prying device (e.g. screwdriver; prybar; etc.) to force the belt over the pulley(s).
i dumped the 345 and went for an FHI factory belt, still tight but it was able to walk on...took 2 of use and was a bitch, but it worked
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Old 01-31-2012, 09:02 PM   #11
CosmoTheCat
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See if they dont have a 5pk890 or 895, it should go on easier.
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Old 02-08-2012, 02:39 AM   #12
Rally Monkey
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I had this issue a while back, the first belt the dealer gave me was just to tight. I took it back and they had another part number that came up, that one went on easy, no crazy move needed to get it on the pulley.
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Old 11-25-2012, 08:25 PM   #13
Wrinkleboi
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I just 'walked' my belt on after reading this thread... it was very tight when walking it on but once it slipped into place it had a bit of slack which I was able to adjust out... pain in the butt but at least it shouldn't be a frequent annoyance.

This was with the Gates K050345 on an 07 STi by the way. The original belt did seem a hair longer in comparison, not sure if thats because it has 60k miles on it or because it was actually designed to be longer though. The AC belt went on fine and was also a Gates belt, part number K04...something, don't know off hand.
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Old 08-27-2013, 06:52 PM   #14
thenextdon13
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Have a 2005 forester xt and having the same issue with the gates k050345 - alternator all the way loose banging against the lower bracket and belt doesn't slip on the way i'd like.

I'd rather have a belt easy to add/remove, and the alternator has a _long_ adjustment. Probably step up one size in the belt...
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Old 08-27-2013, 11:05 PM   #15
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Quote:
Originally Posted by CosmoTheCat View Post
See if they dont have a 5pk890 or 895, it should go on easier.
This.
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Old 08-29-2013, 03:31 AM   #16
thenextdon13
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Thanks for the note-
I ended up grabbing the OEM belt, which _just_ fits.
Took it to the store for giggles and we compared it with the k050345. Indeed, a bit shorter even thought the lengths listed on the belt info were longer.

It was much closer to the 5pk891 that he had in stock, but as i'd already gotten the OEM belt just stuck with that. Made in Indonesia, which is a bit of a letdown.

Thanks for the notes, guys!
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Old 08-29-2013, 10:48 AM   #17
rkramer
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'walking' belts on... That's for noobs. Let the engine do the work for you!



(disclaimer, I take no responsibility for missing digits if you try this)
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Old 09-08-2013, 10:17 AM   #18
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"Thanks Kelso ... RIP"
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Old 09-29-2013, 08:08 PM   #19
ian.maines
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Default Tensioner

Not to insult you, sometimes the obvious is overlooked as too obvious - Is the tensioner adjusted properly?
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Old 09-30-2013, 12:31 AM   #20
thenextdon13
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Quote:
Originally Posted by ian.maines View Post
Not to insult you, sometimes the obvious is overlooked as too obvious - Is the tensioner adjusted properly?
Not sure who you are talking to, or about what particular bit of this thread-
but it is commonly reported that the gates belt simply isn't long enough to slip over the pulleys even with the alternator loosened all the way and pushed down to be banging against it's bracket. Some additional 'convicing' is needed, or the purchase of the OEM belt... or a longer gates belt.
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Old 09-30-2013, 11:11 PM   #21
DONx3
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Ya the alternator belt was a PITA. I had to roll the belt on and it finally got on there.
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