TheDieselPage.com Forums  
2017 - TDP's 21st Anniversary
What's New: | Feature Articles: | Product Reviews: | Member's Area: | Subscribe:
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | Photo Album | Diesel Books, GM Licensed T-shirts


Go Back   TheDieselPage.com Forums > The Diesel Page Member Forums > 1982-2000 C/K Truck & SUV Chassis & Drivetrain
Register FAQ Members List Photo Album Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 08-25-2017, 10:49 AM
JeepSJ JeepSJ is offline
Jeep Freak
 
Join Date: Sep 2003
Location: Feeniks, Aridzona
Posts: 1,039
Default Check those harmonic dampers!!

The duallytruck had developed a bit of a higher-rpm vibration. Fan clutch was failing and I figured they were related as the fan had a lot of play. So get a new fan clutch and start the job. Crawl underneath to unbolt the fan shroud and I notice that the outer ring of the balancer is resting against the back of the lower pulley.



So I pull all the belts and unbolted the lower pulley and the outer ring slid right off.



I've heard about that happening but have never seen one actually come apart. Inner, outer and what is left of the rubber. Amazing how smooth that 454 is with a new balancer. I am just VERY glad that the pulley was a larger diameter than the ring. I could not imagine what a chunk of iron that size could have done had it come off on the freeway.

Now that I think about it, I should check the timing also...there is no telling how long it has been loose.
__________________
1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...

Reply With Quote
  #2  
Old 08-26-2017, 06:38 AM
Robyn's Avatar
Robyn Robyn is offline
Missy Good Wench ( Moderator)
 
Join Date: Apr 2001
Location: Newberg Oregon
Posts: 9,336
Default

Been many a 6.5 that have died an untimely death due to balancer failure.

The serp pulley also has a rubber isolate'r that kills the belt vibrations common to the diesel.

The isolate'r has a bearing assembly and a metal spider to support the pulley, and when the rubber breaks its bond with the internal ring they hammer like crazy and will trash a crank in sort order.

I have seen balance'r rings get loose, IT AIN'T PRETTY

When it happens at freeway speed the driver usually needs a change of shorts

Good pix
__________________
(1) 95 Suburban 2500 4x4
(1) 2017 Smart fortwo
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -7. The time now is 01:56 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1996-2017 by TheDieselPage.com - All Rights Reserved