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Old 12-20-2011, 09:15 PM   eBay Motors  #1 (permalink)
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Replacing belt tensioner and idler pulleys

I have a 2005 LLY with only 20K miles. I have developed a whine under acceleration. I know the belt should last for 150 to 200K but since it was 7 years old I replaced it. Still have whine. Can't tell if it's alternator or pulleys but am guessing tensioner and pulleys. Do I need 2 smooth pulleys and the tensioner? Does the tensioner come with the grooved pulley? Is it just the one bolt that holds these on? Any info, suggestions or help would be appreciated. I'm not much of a mechanic but since I lost my job I can't afford to have it done at a shop. I can follow directions, so anything will help. Thanks....
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Old 12-20-2011, 10:48 PM   eBay Motors  #2 (permalink)
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I found a write in the how to section...
Any suggestions on the cheapest place to get the AC Delco replacements?
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Diablo Sport Predator/EGR Plate
BD Exhaust Manifold
AutoMeter UltraLiteII Pyro Gauge
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Old 12-20-2011, 11:24 PM   eBay Motors  #3 (permalink)
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I think I paid $20 for the idler pulley at the stealer. Not bad.
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Old 12-22-2011, 04:02 PM   eBay Motors  #4 (permalink)
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I just changed all of mine out today. Got all three from NAPA for $60. Just replaced the pulley on the tensioner instead of whole assembly. The hardest part is getting the new belt around the harmonic balancer at the bottom of the engine(the fan is in the way). Its pretty easy:

1. Let the engine cool down for 15 minutes
2. Draw a diagram of the belt routing then
3. Remove the existing belt
4. Remove the tensioner pulley
5. Remove the first idler pulley
6. Remove the other idler pulley
7. Install the new pulleys in reverse order
8. Install the new/existing belt, make sure it is lined up properly in all of the grooves
9. Fire her up and check the belt travel.
10. Crack a beer and relax, you're done. Should take about 20 minutes if you go nice and slow.

Good luck.
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Old 12-22-2011, 06:14 PM   eBay Motors  #5 (permalink)
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Thanks, got all the parts today, followed instructions and all is quiet!
Beer time!
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Diablo Sport Predator/EGR Plate
BD Exhaust Manifold
AutoMeter UltraLiteII Pyro Gauge
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Old 12-22-2011, 08:36 PM   eBay Motors  #6 (permalink)
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Good deal, glad I could help. Feels good to fix her yourself.
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Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 354K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, Nicktane w/ CAT, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
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Old 12-23-2011, 01:33 PM   eBay Motors  #7 (permalink)
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Don't wait till it looks like this....
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File Type: jpg IMG_0151.jpg (55.6 KB, 249 views)
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2003 LB7 4x4 CCSB LT
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20x9 BMF M80's wrapped in 33x12.5 Cooper Discoverer STT
Tie Rod Sleeves and Rancho shocks
ADII 165, Nicktane CAT adapter with 1R-0750
Autometer Pyro and Boost Sport Comp II's
S&B w/ Profab MP w/ PPE Boost Valve and 4" MBRP TB straight piped w/ 5" tip
All-on mod, High Idle Mod.
Tinted, tow mirrors, blacked out, debaged, painted brake lights

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I may do some cab lights soon too. I could think of a lot more but I'm done takin a shit so I gotta log off....
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Old 12-23-2011, 03:00 PM   eBay Motors  #8 (permalink)
 
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My idler pulley sheared right off. The belt looked like spaghetti as I unwound it from around the fan. I do a pre-trip every day, but it's still dark here at 7:30 a.m., so I never noticed anything.

Still a 1/4 million kilometres (mostly city) and countless idling isn't a bad life expectancy.
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Old 12-23-2011, 03:06 PM   eBay Motors  #9 (permalink)
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Quote:
Originally Posted by Earnhardtfan View Post
I just changed all of mine out today. Got all three from NAPA for $60. Just replaced the pulley on the tensioner instead of whole assembly. The hardest part is getting the new belt around the harmonic balancer at the bottom of the engine(the fan is in the way). Its pretty easy:

1. Let the engine cool down for 15 minutes
2. Draw a diagram of the belt routing then
3. Remove the existing belt
4. Remove the tensioner pulley
5. Remove the first idler pulley
6. Remove the other idler pulley
7. Install the new pulleys in reverse order
8. Install the new/existing belt, make sure it is lined up properly in all of the grooves
9. Fire her up and check the belt travel.
10. Crack a beer and relax, you're done. Should take about 20 minutes if you go nice and slow.

Good luck.
Good list, thanks!
__________________
2007 GMC Sierra Classic 2500HD CCSB 4X4
2012 Komfort 3530FBH

SOLD - 2003 GMC Sierra 2500HD SLT CC SB 4X4
SOLD - Cardinal 33TBH
SOLD - 2008 Chevy 3500HD LTZ CCLB Dually 4X4

www.performancetruckproducts.com - awesome!
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Old 12-23-2011, 06:35 PM   eBay Motors  #10 (permalink)
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Sure thing.
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Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 354K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, Nicktane w/ CAT, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
APPALACHIAN COAL ROLLERS
Merchant Automotive
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