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Old 10-22-2017, 09:37 PM   #61 (permalink)
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6mm difference in pulley diameter is likely not going to cause an issue. You can always just replace the bearings in your stock pulleys like I and others have done.
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Old 10-23-2017, 03:58 AM   #62 (permalink)
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If you use 76 mm on the tensioner and 82 mm for the stationary idler, the tensioner will end up essentially in the same position it was in with the original parts (both 80 mm in this case). It's a simple calculation based on wrap-around angles (measured by means of eyeballing). I posted it on the Outback board after having to do this job.

Last edited by avk; 10-23-2017 at 04:01 AM.
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Old 10-23-2017, 05:55 AM   #63 (permalink)
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I purchased 2 of the 76 mm pulleys (89007). I'll check your post out a bit more.

Maybe I won't feel so bad about ordering the whole tensioner assembly due to the rattling I am experiencing. Hoping that tensioner pulley on the new tensioner assembly is 82mm.

Might work out after all!

https://www.sb9t.com/forums/33-warran...-rattling.html

EDIT: The tensioner pulley on the assembly is 80mm. Still, this should get me very close to the 82/76 combo. Others have stated that the 76mm pulley appeared to be just like the 80mm pulley. I'll probably grab the dial calipers and report back.

EDIT 2: The 89007 is just over 76mm in size.

89662 is the tensioner with pulley already on it. The pulley is just under 80mm in size.

http://www.daycoproducts.com/part?ca...number%3D89662
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Last edited by 06b9beca; 10-25-2017 at 08:46 AM.
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Old 10-28-2017, 01:42 PM   #64 (permalink)
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I went with the Dayco Tensioner (tensioner arm with 80mm pulley) It was a piece of junk. You pull too far and it snaps back violently. I used the 2 76mm pulley along with a new belt and called it a day. Makes getting a belt on not too difficult.
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Old 10-29-2017, 11:44 AM   #65 (permalink)
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Actually, at least according to the available photos, Dayco 89662 appears to be a genuine OE part, with the factory number and Fuji "swoosh" ground away from the casting. Same goes for other brands re. this particular application. I have an ACDelco just in case, it is the same way. Perhaps the new spring is stronger than the one with 170,000+ miles in service.
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Old 10-29-2017, 01:48 PM   #66 (permalink)
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Quote:
Originally Posted by avk View Post
Actually, at least according to the available photos, Dayco 89662 appears to be a genuine OE part, with the factory number and Fuji "swoosh" ground away from the casting. Same goes for other brands re. this particular application. I have an ACDelco just in case, it is the same way. Perhaps the new spring is stronger than the one with 170,000+ miles in service.
This one was defective. After using a proper tensioner tool on the 15mm head to get the belt on, it would just spring back violently to it's original position with little notice as I tried to get the belt back on. I can't imagine this would be normal activity. I just used the tensioner arm from the JDM engine (with a new Dayco tensioner pulley) which should have much lower miles. If I find I need the whole arm, I'll try out the ACDelco instead.

Last edited by 06b9beca; 10-29-2017 at 02:03 PM.
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Old 11-02-2017, 06:16 PM   #67 (permalink)
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Of course I try the job before I read this... I lost my nut down that hole!
Will a steel nut from the home supply store work fine?
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Old 11-04-2017, 10:11 PM   #68 (permalink)
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Bummer. Good luck, I don't know for sure. You'll have to buy an assortment and see what works. I'm sure you can figure something out.
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Old 12-30-2017, 12:11 PM   #69 (permalink)
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Default replaced the dayco pulleys today as a preventative- 5 year follow up

Quote:
Originally Posted by tribecadean View Post
here is some help. Stuff that helped me.

I think I have 100k on the two dayco's. I put 2 new ones on today.they were $21 each at advance auto parts.

I replaced the tensioner and idler today.they were smooth however , maybe getting a bit dry as the tensioner spins freely 8-10 times with a flick.

I am sorta glad I replaced them, as now I should be done for another 100k.


oops : sorry for the photo of my coolant debris...that is for another post..not sure what the brwn crap is
Attached Images
File Type: jpg spins freely .JPG (28.8 KB, 15 views)
File Type: jpg replaced these 2 .JPG (43.5 KB, 18 views)
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Old 12-30-2017, 12:18 PM   #70 (permalink)
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Default spins freely at 100k

Quote:
Originally Posted by tribecadean View Post
I think I have 100k on the two dayco's. I put 2 new ones on today.they were $21 each at advance auto parts.

I replaced the tensioner and idler today.they were smooth however , maybe getting a bit dry as the tensioner spins freely 8-10 times with a flick.

I am sorta glad I replaced them, as now I should be done for another 100k.


oops : sorry for the photo of my coolant debris...that is for another post..not sure what the brwn crap is
here is the photo i meant to post

PS: DO NOT FORGET TO STUFF A RAG behind the tensioner bolt so you dont displace and lose track of the nut for the tensioner axle
Attached Images
File Type: jpg spins freely with a flick .JPG (33.7 KB, 17 views)
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2006 tribeca- had a JDM swap at 215k,now at 223K
2002 legacy gt wagon at 152k
2000 outback wagon-198k-head gasket again-gone
Did full 60,000 service, ipod addition, rubber sway bar bushings, generic sepentine pulleys,Lexus 460x silicone wipers,thermoquietpads,tranny filter thru bumper cover. Thank you all
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Old 08-04-2019, 12:05 PM   #71 (permalink)
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Subaru ought to update their maintenance schedule to call for replacing or at least inspecting the tensioner pulley and idler pulley every 40k mi.

I needed to replace them at less than 40k miles and just replaced them as a preventative measure at 80k miles. The idler pulley bearing was okay but the tensioner pulley bearing was rough.

I keep a spare set of pulleys, a used belt, and a 14mm socket and ratchet in the trunk, just in case.
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