TheDieselPage.com Forums  
2018 - TDP's 22nd 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 > 6.5L Turbo Diesel
Register FAQ Members List Photo Album Mark Forums Read

6.5L Turbo Diesel 1992-00 6.5TD - Discussion forum for the 6.5L engine.

Reply
 
Thread Tools Display Modes
  #1  
Old 12-16-2017, 01:22 PM
suffolksnowbird suffolksnowbird is offline
Newbie
 
Join Date: Nov 2017
Location: Suffolk, VA
Posts: 3
Post Knock

Hi: I'm a new guy on the block. We (my son and I) just purchased a "new to us" 1998 GMC 2500 6.5 turbo diesel originally owned and operated by VDOT. We seem to be the 3rd owners since it was state owned. We bought it at a bargain price because of the loud knock and the code message that No. 6 cylinder was not working. Thought it might be an injector but with all new injectors have now been able to hear a very loud knock in No. 6. The body of the truck is in excellent shape for it's year, but the engine has 396,752 miles. Should we tear it down and rebuild it or just worry about the No. 6 cylinder?
Reply With Quote
  #2  
Old 12-16-2017, 03:12 PM
DmaxMaverick's Avatar
DmaxMaverick DmaxMaverick is offline
Administrator
 
Join Date: Apr 2001
Location: CA
Posts: 11,888
Arrow

Welcome aboard!

If you've eliminated the injectors, I suspect a repower will be in order. A rebuild or replace will depend on what you find on disassembly. With that many miles and a very loud knock, the likelihood of broken crank, main or some other more serious issue is much higher. You've already dealt with the possible #6 fix about as much as you can, so anything further will be an overhaul.
__________________
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel - Fabulous car, no problems at all, but sold Nov. 2016 @ 55K miles.
dmaxmaverick@thedieselpage.com
Reply With Quote
  #3  
Old 12-18-2017, 08:33 AM
suffolksnowbird suffolksnowbird is offline
Newbie
 
Join Date: Nov 2017
Location: Suffolk, VA
Posts: 3
Post Knock

Thanks for your thoughts on the situation. You answered our concerns with a confirmation for pulling the engine and checking out the insides. We sorta thought that was gonna be our "need to do." We have the garage, the chain falls and the engine stand. Appreciate your experience. We shall keep on learning and post the outcome.
Reply With Quote
  #4  
Old 12-18-2017, 06:17 PM
a5150nut's Avatar
a5150nut a5150nut is offline
Enthusiast
 
Join Date: Jan 2001
Location: Knoxville,Tennessee
Posts: 2,183
Default

Hope you have a stout engine stand. These 6.5s aren't light.
__________________
"The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
-Patrick Henry


A5150nut
2006 K3500 D/A
94 6.5 4x4 5spd Sold
Reply With Quote
  #5  
Old 12-19-2017, 09:33 AM
JeepSJ JeepSJ is offline
Jeep Freak
 
Join Date: Sep 2003
Location: Feeniks, Aridzona
Posts: 1,102
Default

Quote:
Originally Posted by a5150nut View Post
Hope you have a stout engine stand. These 6.5s aren't light.
Bought a heavy duty unit from Harbor Freight. I scrapped all the cheap hardware and used grade 5 stuff everywhere. Works nicely.
__________________
1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...

Reply With Quote
  #6  
Old 12-19-2017, 09:53 AM
suffolksnowbird suffolksnowbird is offline
Newbie
 
Join Date: Nov 2017
Location: Suffolk, VA
Posts: 3
Default Knock

Great Idea. Will do the same. Our stand has seen a few engines but they were not 6.5's. Thanks.
Reply With Quote
Reply

Tags
no. 6 knocking

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 07:01 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright 1996-2018 by TheDieselPage.com - All Rights Reserved