Duramax Diesels Forum Truck of the Week
  #1  
Old 10-06-2017, 05:25 AM
Renaldo Renaldo is offline
FNG
 
Join Date: Oct 2017
Posts: 2
Default Seeking Wisdom on LB7 Injector Job...

Duramax LB7 2004, 150K, needs new injectors. Dealer wants $6500 so...I figured I would mess up the job myself and save $$.

This will be the second injector job on truck...first done by dealer under warranty at about 100K with "new improved injectors...(sigh)".

I am a shade tree mechanic, seeking wisdom. Hoping to get another 50K out of truck.

My plan is to replace injectors, all related seals/gaskets and the eight high pressure fuel lines (hoping to avoid getting debris in new injectors).

Question: Should I replace injector cups (even if they don't lift up)?

Should I change out anything else while I am in there even if there is no apparent problem. Fuel return line? Other?

I would rather spend a few hundred more and do it right.

Thanks for your help.
Reply With Quote
  #2  
Old 10-06-2017, 05:39 AM
zakkb787's Avatar
zakkb787 zakkb787 is offline
It's actually Zach
 
Join Date: Sep 2014
Location: Granite Falls NC
Posts: 758

Default

You do not need to replace all the cups. However you should remove all of them and clean the hole, replace o rings, and reseal. No need for new return lines. I would recommend 2 new bolts for the return lines at the head as I've had a few twist in half. Also, the factory go return line bolts at the injectors are a major pain. You'll be lucky if you don't round them off. Make sure you have a GOOD QUALITY 5mm Allen head socket. Flat ended. Not ball ended. My recommendation would me Merchant Auto upgraded return line bolts. I got sick of my factory ones cause issues and got them. They are great. Double the head on them so that can easily be properly torqued.
__________________
2002 Chevy EC/SB LT 4x4. S&B intake. 5" Magnaflow SP. LML manifold. PPE stage 5 tranny. 30% over Bosch injectors. LBZ SuperSport pump. Studs. All powder coated. EFI by Ridge Runner. Twin Kennedy pumps & pickup. Glowshift gauges. Edge insight cts. Trimmed and lowered on Gear 22x12s and 305/40 Proxes ST. SOLD

Now driving a 2011 f150 platinum ecoboost with 288k
Other toys:
"Tank" 1982 K10 6.2 Detroit diesel/sm465/np205 with 4 inches of lift and 35s. Slow and indestructible
2011 Yamaha YFZ450X
1992 Yamaha Waverunner 3
Reply With Quote
  #3  
Old 10-06-2017, 06:42 AM
Brent@LDS's Avatar
Brent@LDS Brent@LDS is offline
Vendor
 
Join Date: Aug 2011
Location: Wisconsin
Posts: 400
Default

We have the install instructions/torque specs here to complete the injector job. We also have all kinds of different kits with the injectors at unbeatable prices. Let me know if I can help.
__________________
Looking for LB7 Injectors?
Check these prices out!....
......... Lincoln Diesel Specialties .........
Phone: 920-361-7700
Reply With Quote
  #4  
Old 10-06-2017, 06:53 AM
JoshH's Avatar
JoshH JoshH is offline
Daggum farm truck
 
Join Date: Feb 2007
Location: Texas!!!
Posts: 12,450

Default

Definitely talk to Brent!
__________________
06 Silverado 4x4 CC/SB

06 Express 2500 Duramax Van "The Dumpster"


Reply With Quote
  #5  
Old 10-06-2017, 07:03 AM
JRein JRein is offline
Aircraft Mechanic's Hero
 
Join Date: Sep 2015
Location: LRAFB, Arkansas
Posts: 210
Default

Quote:
Originally Posted by JoshH View Post
Definitely talk to Brent!
X2

Sent from my SAMSUNG-SGH-I747 using Tapatalk
__________________
-J.R.-
_______________________________________________

2004 LB7 2500HD 4X4 CCSB
Mods: LDS 63.5mm turbo, 45% SAC injectors, Built Allison, Mishimoto IC piping, EFI Live, Modded stock intake, Modded intake horn, Intake heater Deleted, Water separator/10 micron/Lift Pump, CAT Filter, 3" down pipe, MBRP 4", Incognito tie rods, High Idle, MA pump rub kit

Tunes by Idaho Rob
Trans Kit from Evan @ Limitless Diesel
Reply With Quote
  #6  
Old 10-06-2017, 07:07 AM
zakkb787's Avatar
zakkb787 zakkb787 is offline
It's actually Zach
 
Join Date: Sep 2014
Location: Granite Falls NC
Posts: 758

Default

X3. Best prices and best service.
__________________
2002 Chevy EC/SB LT 4x4. S&B intake. 5" Magnaflow SP. LML manifold. PPE stage 5 tranny. 30% over Bosch injectors. LBZ SuperSport pump. Studs. All powder coated. EFI by Ridge Runner. Twin Kennedy pumps & pickup. Glowshift gauges. Edge insight cts. Trimmed and lowered on Gear 22x12s and 305/40 Proxes ST. SOLD

Now driving a 2011 f150 platinum ecoboost with 288k
Other toys:
"Tank" 1982 K10 6.2 Detroit diesel/sm465/np205 with 4 inches of lift and 35s. Slow and indestructible
2011 Yamaha YFZ450X
1992 Yamaha Waverunner 3
Reply With Quote
  #7  
Old 10-06-2017, 10:22 AM
Renaldo Renaldo is offline
FNG
 
Join Date: Oct 2017
Posts: 2
Default Thanks guys!

Thanks and I guess I will "talk to Brent"! I will buy some primo hex 5mm bits.
Reply With Quote
  #8  
Old 10-08-2017, 06:35 PM
duramax on fire duramax on fire is offline
Hotrodder
 
Join Date: Apr 2015
Location: dallas
Posts: 132
Default

I'm a shade tree mechanic also. Bought my first dmax lb7 and within 5k miles I was going injectors. It's an easy job. Just pray you don't have any valve cover bolts round out. Yes you need a good set of Allen head sockets. If the return lines strip vise grips will break them loose. It's really not a bad job. The pain is pulling and resealing the injector cups. In my opinion. These lb7 injectors are funny. I have a friend that bought an 03 new and he's still on factory injectors. 190k miles.
Reply With Quote
  #9  
Old 10-11-2017, 01:18 PM
warriorcustoms warriorcustoms is offline
FNG
 
Join Date: Oct 2017
Location: Leon OK
Posts: 24
Default

Grab the SAC 45s from Brent & get a single tune to clean em up!!! It adds a little power & MPGs from what Ive collected... I was gonna go LLY Topend but these injectors sound like the ticket for LB7s
Reply With Quote
  #10  
Old 10-11-2017, 09:44 PM
bigmackmiller's Avatar
bigmackmiller bigmackmiller is online now
Hotrodder
 
Join Date: Nov 2008
Location: Kokomo, IN
Posts: 852
Default

Should be sweet, really happy with my 65ís from Brent, picked up around 1.5mpg so far


Sent from my iPhone using Tapatalk
__________________
2007 LBZ EXT CAB S/B 4x4 SLT

4' MBRP SS
Reply With Quote
  #11  
Old 10-12-2017, 06:30 AM
Brent@LDS's Avatar
Brent@LDS Brent@LDS is offline
Vendor
 
Join Date: Aug 2011
Location: Wisconsin
Posts: 400
Default

The SAC injectors are the way to go!
__________________
Looking for LB7 Injectors?
Check these prices out!....
......... Lincoln Diesel Specialties .........
Phone: 920-361-7700
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 06:12 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vB.Sponsors