Replacing belt tensioner and idler pulleys - Chevy and GMC Duramax Diesel Forum

Maintenance Discuss scheduled maintenace, capacities, filter part numbers, etc.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 12-20-2011, 08:15 PM Thread Starter
Senior Member
 
bob213's Avatar
 
Join Date: Apr 2008
Location: Fresno, CA
Posts: 330
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....

2005 GMC Crew Cab SLT 4X4
4" MBRP turbo back
Diablo Sport Predator/EGR Plate
BD Exhaust Manifold
AutoMeter UltraLiteII Pyro Gauge
Induction Overhaul Kit
True CAI
bob213 is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 12-20-2011, 09:48 PM Thread Starter
Senior Member
 
bob213's Avatar
 
Join Date: Apr 2008
Location: Fresno, CA
Posts: 330
I found a write in the how to section...
Any suggestions on the cheapest place to get the AC Delco replacements?

2005 GMC Crew Cab SLT 4X4
4" MBRP turbo back
Diablo Sport Predator/EGR Plate
BD Exhaust Manifold
AutoMeter UltraLiteII Pyro Gauge
Induction Overhaul Kit
True CAI
bob213 is offline  
post #3 of 11 (permalink) Old 12-20-2011, 10:24 PM
Junior Member
 
Join Date: Jun 2010
Posts: 138
I think I paid $20 for the idler pulley at the stealer. Not bad.

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!
dieseldan723 is offline  
post #4 of 11 (permalink) Old 12-22-2011, 03:02 PM
DuramaxForum Veteran
 
Earnhardtfan's Avatar
 
Join Date: Mar 2011
Location: Concord, NC
Posts: 1,825
Garage
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.

Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 431K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing w/ Racor, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
Lincoln Diesel Specialties
Merchant Automotive
Earnhardtfan is offline  
post #5 of 11 (permalink) Old 12-22-2011, 05:14 PM Thread Starter
Senior Member
 
bob213's Avatar
 
Join Date: Apr 2008
Location: Fresno, CA
Posts: 330
Thanks, got all the parts today, followed instructions and all is quiet!
Beer time!

2005 GMC Crew Cab SLT 4X4
4" MBRP turbo back
Diablo Sport Predator/EGR Plate
BD Exhaust Manifold
AutoMeter UltraLiteII Pyro Gauge
Induction Overhaul Kit
True CAI
bob213 is offline  
post #6 of 11 (permalink) Old 12-22-2011, 07:36 PM
DuramaxForum Veteran
 
Earnhardtfan's Avatar
 
Join Date: Mar 2011
Location: Concord, NC
Posts: 1,825
Garage
Good deal, glad I could help. Feels good to fix her yourself.

Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 431K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing w/ Racor, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
Lincoln Diesel Specialties
Merchant Automotive
Earnhardtfan is offline  
post #7 of 11 (permalink) Old 12-23-2011, 12:33 PM
Senior Member
 
Cameron10483's Avatar
 
Join Date: Jun 2011
Location: Elkhart, IN
Posts: 502
Don't wait till it looks like this....
Attached Images
File Type: jpg IMG_0150.jpg (63.3 KB, 338 views)
File Type: jpg IMG_0151.jpg (55.6 KB, 328 views)

2003 LB7 4x4 CCSB LT
EFI w/ DSP5 by ATP (Idaho Rob, SickDiesel)
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

Quote:
Originally Posted by Duraskank View Post
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....
Cameron10483 is offline  
post #8 of 11 (permalink) Old 12-23-2011, 02:00 PM
 
Join Date: Dec 2011
Location: Winnipeg, Canada
Posts: 8
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.
Reverend Blair is offline  
post #9 of 11 (permalink) Old 12-23-2011, 02:06 PM
Junior Member
 
Join Date: Jun 2010
Posts: 138
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!
dieseldan723 is offline  
post #10 of 11 (permalink) Old 12-23-2011, 05:35 PM
DuramaxForum Veteran
 
Earnhardtfan's Avatar
 
Join Date: Mar 2011
Location: Concord, NC
Posts: 1,825
Garage
Sure thing.

Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 431K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing w/ Racor, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
Lincoln Diesel Specialties
Merchant Automotive
Earnhardtfan is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome