The Diesel Page Forums

2019 - TDP's 23rd Anniversary
What's New | Feature Articles | Product Reviews | Member's Area | Free Forum Registration
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | The Diesel Page - Publications

Go Back Forums > The Diesel Page Forums > 6.2L Diesel
Register FAQ Members List Photo Album Mark Forums Read

6.2L Diesel 1982-93 6.2L Diesel - Welcome to the Internet's first discussion forum for the 6.2L engine.

Thread Tools Display Modes
Old 10-12-2018, 11:06 AM
4077th 4077th is offline
Join Date: Oct 2018
Location: Yuma
Posts: 3
Default Resealed my injection pump, stalling issue.

I'll try to keep this short. Posted on 2 other boards, with no replies.

Does anyone know if the throttle shaft can be installed on the min-max gov linkage incorrectly? I know the top cover of the Db2 pump itself can be installed on the wrong side of the gov linkage (causing a run away) but this is not my problem.

Truck runs great at WOT, mid throttle, good timing, good power, no air in the system verified by a clear IP return line. Truck runs perfect.......

It just WONT idle after reasealing the IP. I had to bottom out the low idle screw to get it to 500 rpm ish. Idles kind of rough, but is smooth if I hold it open a little further.

So i'm thinking 1 of 2 issues. I either goofed installing the throttle shaft on the governor shaft (shaft has 2 steps) or tank sock is plugged. I know the Db2 pulls fuel well at higher RPM but not much at idle. I'm pushing through a 10 micron and 2 micron with a 12v lift pump.
Reply With Quote
Old 10-13-2018, 10:22 AM
4077th 4077th is offline
Join Date: Oct 2018
Location: Yuma
Posts: 3

Backed the governor nut out 1 full turn. Truck is back to normal, idled a little too high but a little backing out on the external low idle screw got it in the sweet spot. She runs like she did 3 years ago, and with all the new seals is leak free.

It was a great learning curve completely re sealing this pump, I would do it again in a heart beat. They are really simpler than the shops let on. Big thanks to DieselPro at DieselPlace and all the Stanadyne manuals.
Reply With Quote
Old 11-18-2018, 12:42 PM
Robyn's Avatar
Robyn Robyn is offline
Missy Good Wench ( Moderator)
Join Date: Apr 2001
Location: Newberg Oregon
Posts: 10,109

Glad you got it fixed.

I have replaced the throttle shaft seals and the top cover seal, but never the entire package
(1) 1995 Suburban 2500 4x4
(1) 1997 Astro
(1) 2007 Chevy Avalanche
Reply With Quote
Old 12-28-2018, 01:22 PM
welshswampy welshswampy is offline
Join Date: Mar 2013
Location: S.Wales, UK
Posts: 11

Hi, how much of a job is it to reseal
I'm not a mechanic, I'm a plumber/heating engineer (UK) and can happily repair/refurbish various diverter/boiler valves
I know that is probably an apples and oranges comparison, but wouldn't mind giving it a go
Is it a case of carefully taking apart and recording/taking pics of the process and then, after replacing seals etc, working in reverse
Reply With Quote
Old 12-28-2018, 08:19 PM
4077th 4077th is offline
Join Date: Oct 2018
Location: Yuma
Posts: 3

It's pretty easy, sounds like you have a mind for mechanical bits like I do.
The head and rotor are very sensitive to particles. Fingerprints alone can keep the rotor from sliding back into the hydraulic head. So go slow and be clean.

Just dont mess with the Allen fuel adjustment screw and your fine. Also dont remove the delivery valve plunger from the rotor, no need to. It requires an inch pound torque wrench to reseat as well as a new delivery valve stop that looks like a little steel cone. This part is apparently not reusable, the kit I bought did come with s new one.
Reply With Quote

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 01:15 PM.

Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 1996-2019 by - All Rights Reserved