06-26-2017, 08:53 PM
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#16
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Join Date: Jun 2009
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Just replaced the Tensioner ASSEMBLY Friday. I replaced the idler pulley about 15,000miles ago. Just do the whole assembly. I was having a really gnarly chatter and belt chirp, and finally tracked it down to the assembly that wasn't exerting tension smoothly.
One tip: if, when you use your ratchet or bar to release tension on the serpentine belt, the assembly creaks AT ALL, or isn't totally smooth, replace the whole shebang.
I did it in 4 hours, including setting up an ice bucket with a fan (garage was 105 degrees) as a swamp cooler, working on my computer for some torque specs, talking with the girlfriend when she called (too often), etc. it's not fun but man is the engine better now. it even idles smoother.
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2008 4Runner, V6 SR5 4x4: Front Setup: Icon 2.5 Ext. Travel coilovers, Camburg 1.25 uniball UCA; Rear Setup: 1.5 inch lift Eibach +15% stiffness, Icon 2.0 Remote Resi; ;FN FxPRO wheels 17x8, gloss gunmetal grey; BFGoodrich All-Terrain T/A KO2 LT265/70R17 Load Range C
Shrockworks rock sliders, Husky-liners throughout, TRD Exhaust, Optima Yellowtop D27f, Rigid Dually Pro Spots mounted on CBI ditch brackets, Dynamatted doors and rear cargo area, hardwired 8500 X50 Radar detector, Homelink addition, Alpine ILX-W650 head unit with parking brake bypass, Ultragauge II, Silverstar Ultra lo-beam, OPT7 Hi-beam, Mobil1 synthetic in engine, both diffs and transfer case, Thule T2 Bike rack and Fatcat6 ski racks...
Last edited by aika1; 06-26-2017 at 08:53 PM.
Reason: mis-spelling
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03-04-2018, 08:48 PM
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#17
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Join Date: Sep 2004
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Age: 64
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Member
Join Date: Sep 2004
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Idler Pulley
Are both the idler pulley and tensioner pulley left handed threads? Thanks.
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03-05-2018, 12:44 AM
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#18
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Join Date: Jun 2009
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Quote:
Originally Posted by fishin
Are both the idler pulley and tensioner pulley left handed threads? Thanks.
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Just idler, if I recall correctly. 95% sure.
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2008 4Runner, V6 SR5 4x4: Front Setup: Icon 2.5 Ext. Travel coilovers, Camburg 1.25 uniball UCA; Rear Setup: 1.5 inch lift Eibach +15% stiffness, Icon 2.0 Remote Resi; ;FN FxPRO wheels 17x8, gloss gunmetal grey; BFGoodrich All-Terrain T/A KO2 LT265/70R17 Load Range C
Shrockworks rock sliders, Husky-liners throughout, TRD Exhaust, Optima Yellowtop D27f, Rigid Dually Pro Spots mounted on CBI ditch brackets, Dynamatted doors and rear cargo area, hardwired 8500 X50 Radar detector, Homelink addition, Alpine ILX-W650 head unit with parking brake bypass, Ultragauge II, Silverstar Ultra lo-beam, OPT7 Hi-beam, Mobil1 synthetic in engine, both diffs and transfer case, Thule T2 Bike rack and Fatcat6 ski racks...
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03-08-2018, 09:41 PM
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#19
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Join Date: Jun 2009
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Quote:
Originally Posted by aika1
Just idler, if I recall correctly. 95% sure.
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GOOD GOD, I just reread this, and I must apologize. Just the TENSIONER. the others are standard thread. SORRY!!!
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2008 4Runner, V6 SR5 4x4: Front Setup: Icon 2.5 Ext. Travel coilovers, Camburg 1.25 uniball UCA; Rear Setup: 1.5 inch lift Eibach +15% stiffness, Icon 2.0 Remote Resi; ;FN FxPRO wheels 17x8, gloss gunmetal grey; BFGoodrich All-Terrain T/A KO2 LT265/70R17 Load Range C
Shrockworks rock sliders, Husky-liners throughout, TRD Exhaust, Optima Yellowtop D27f, Rigid Dually Pro Spots mounted on CBI ditch brackets, Dynamatted doors and rear cargo area, hardwired 8500 X50 Radar detector, Homelink addition, Alpine ILX-W650 head unit with parking brake bypass, Ultragauge II, Silverstar Ultra lo-beam, OPT7 Hi-beam, Mobil1 synthetic in engine, both diffs and transfer case, Thule T2 Bike rack and Fatcat6 ski racks...
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04-01-2018, 09:40 AM
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#20
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Junior Member
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Join Date: Nov 2007
Location: Germany
Posts: 6
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Join Date: Nov 2007
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idler
Quote:
Originally Posted by aika1
GOOD GOD, I just reread this, and I must apologize. Just the TENSIONER. the others are standard thread. SORRY!!!
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I just checked my 07 4Runner 4.0 V6 and I count 3 idler pulleys + tensioner pulley. The parts you listed are the 3 idler pulleys? Or is one of them the tensioner pulley? Thanks.
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04-01-2018, 10:54 AM
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#21
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Join Date: Mar 2013
Location: Utah
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I used the Napa pulleys since they are sealed and I’ve heard they hold up better in water.
Sent from my iPhone using Tapatalk
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06-16-2018, 08:17 PM
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#22
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Join Date: Dec 2017
Location: NoVa / DC / Shenandoah Valley / GWNF
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Location: NoVa / DC / Shenandoah Valley / GWNF
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The V8 uses:
1 idler pulley: Dayco 89154; Toyota 16604-50030
1 Tensioner/pulley: Dayco 89255; Toyota 16620-0W101 (reverse thread pulley bolt  )
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2007 T4R Sport V8 4WD, 145K, Seat Warmers, Pioneer NEX
2007 T4R Limited V8, 4WD, 181K, OME 2"
2014 GX 460 Premium
1997 FZJ80 OME 2.5"
2006 T4R Limited V8 - R.I.P.
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12-14-2018, 03:16 PM
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#23
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Join Date: Apr 2013
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belt tensioner pulley
Anyone know the part number for the tensioner pulley only? I can find the whole tensioner unit, but I only need the pulley. 4.0 V6
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12-14-2018, 04:11 PM
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#24
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Senior Member
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Join Date: Dec 2012
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Senior Member
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I will inject this here...
Not a bad alternator?
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2004 T4R 4x4 SR5 v6
Some modifications.
Black-N-Blue
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03-18-2021, 02:37 AM
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#25
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Quote:
Originally Posted by aika1
Just replaced the Tensioner ASSEMBLY Friday. I replaced the idler pulley about 15,000miles ago. Just do the whole assembly. I was having a really gnarly chatter and belt chirp, and finally tracked it down to the assembly that wasn't exerting tension smoothly.
One tip: if, when you use your ratchet or bar to release tension on the serpentine belt, the assembly creaks AT ALL, or isn't totally smooth, replace the whole shebang.
I did it in 4 hours, including setting up an ice bucket with a fan (garage was 105 degrees) as a swamp cooler, working on my computer for some torque specs, talking with the girlfriend when she called (too often), etc. it's not fun but man is the engine better now. it even idles smoother.
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Thanks for the detailed write up.
My truck developed a loud chatter recently, which goes away when warm, which am sure is from the idler pulleys or tensioner.
Any danger of the belt grenading if the issue isnt tackled asap?..
From this post, i see its only the tensioner that is reverse thread.please confirm this.
How easy was it to break the bolt holding the idler rollers. You know the factory torque specs?
Am short of time and have a 250mile trip lined up
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2005 v6, galactic grey 4wd auto : pioneer avh 4400bh dvd hu, pyle reverse cam
2003 rav4 titanuim silver 4wd auto...... sold
2004 rav4 titanuim silver 4wd auto : pionneer avhx 5500bt hu, pyle reverse cam
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03-18-2021, 06:36 AM
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#26
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Senior Member
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Join Date: Nov 2016
Location: South Carolina
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Real Name: Skip
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Quote:
Originally Posted by earthrealm
Thanks for the detailed write up.
My truck developed a loud chatter recently, which goes away when warm, which am sure is from the idler pulleys or tensioner.
Any danger of the belt grenading if the issue isnt tackled asap?..
From this post, i see its only the tensioner that is reverse thread.please confirm this.
How easy was it to break the bolt holding the idler rollers. You know the factory torque specs?
Am short of time and have a 250mile trip lined up
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I have the V8 and it was my tensioner bearing that went out on me, it was a bit noisy but didn't brother me too much...until when leaving for work one morning it completely froze up and the belt slipping on the pulley was deafening, I had to take off work to fix it that day, the belt was toast but didn't break by the time I went to a parts store a total of about 15 miles and back home to fix it.
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2004 Limited V8
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01-23-2022, 05:15 PM
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#27
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Hi guys. When I check on amazon. This part I need 2 of is saying this doesnt not fit the 04 4runner v6. Is this just an error on Amazon? I will order them if you guys say it is in fact the correct part. Thanks
I think I attached the photo correctly
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01-23-2022, 06:26 PM
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#28
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Senior Member
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Join Date: Nov 2016
Location: South Carolina
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Real Name: Skip
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Quote:
Originally Posted by Jssrvlz
Hi guys. When I check on amazon. This part I need 2 of is saying this doesnt not fit the 04 4runner v6. Is this just an error on Amazon? I will order them if you guys say it is in fact the correct part. Thanks
I think I attached the photo correctly
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I can't say for the V6 if that's the correct pulley or not, I don't have the V6 engine, BUT I would highly suggest you get a tape measure and try and get a measurement of the pulleys on your engine, the reason I say this is because I have the V8 and for the 2004 year model the V8 came with different size pulleys depending on when it was manufactured, later 2004 V8s had a smaller pulley than the earlier 2004 V8s.
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2004 Limited V8
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01-23-2022, 06:50 PM
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#29
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Join Date: Oct 2010
Location: NH
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Join Date: Oct 2010
Location: NH
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Quote:
Originally Posted by Jssrvlz
Hi guys. When I check on amazon. This part I need 2 of is saying this doesnt not fit the 04 4runner v6. Is this just an error on Amazon? I will order them if you guys say it is in fact the correct part. Thanks
I think I attached the photo correctly
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Check Rockauto to confirm your part #s. Usually a little cheaper than Amazon too after the 5% discount code found everywhere. FYI, you might save a few bucks with Dayco but odds are that it won't last you even half as long as a Gates. All the gates pullies and tensioners I've seen were made in Canada by OEM maker Litens and used the OEM NTN bearings. Even the older US made Daycos I've seen used cheap Chinese bearings
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'85 4Runner, 22re 5spd; '90 4Runner, 5spd, 3.4 swap
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01-24-2022, 01:01 AM
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#30
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Join Date: Mar 2021
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Thanks for the info on this old thread.
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