Duramax Diesels Forum Truck of the Week
  #16  
Old 04-07-2017, 05:30 PM
IOWA LLY's Avatar
IOWA LLY IOWA LLY is offline
Yes, its really me
 
Join Date: Feb 2007
Posts: 2,275
Default

Thanks guys. I've read that thread, and I have a mityvac. I just don't have one that switches from vac to pressure


Sent from my iPhone using Tapatalk Pro
__________________
2003 GMC CCSB LLY
Built by me, tuned by me.

2009 ECI Diesel Truck Points Champion
2010 ECI Diesel Truck Points Champion
2011 ECI Diesel Truck Points Champion
2012 ECI Diesel Truck Points Champion

Big thanks to everyone who helps me.

Best 1/8th, 7.29, 98.6MPH (Street tires, fuel only, single Journal bearing GT42 charger) (2010)

Best 1/8th, 6.93, 104.24MPH (Street tires, fuel only, single HX60 turbo) (2016)

Best 1/8th, 6.60, 106.6MPH (Street tires, fuel only, single HX60 turbo) (2017)
Reply With Quote
  #17  
Old 04-07-2017, 08:20 PM
Bustedknuckles's Avatar
Bustedknuckles Bustedknuckles is offline
Honey Badger
 
Join Date: Sep 2010
Location: Hagerstown MD
Posts: 1,306
Default

Quote:
Originally Posted by 2004LB7 View Post
the Mighty vac thread posted a bit ago by bullfrogjohnson

http://www.duramaxdiesels.com/forum/...ad.php?t=36759
The problem with this is that the return lines are a pain to get to. I could tell you which side is leaking and have the valve cover half off till you even knew which side was leaking using that method.
__________________
04 lb7: 06 front clip, EPR s366, 30% over injectors, ARP head studs, Idaho-Rob tunes, airdog, PPE trans, Precision ML converter, etc......
Reply With Quote
  #18  
Old 02-21-2019, 06:09 PM
Rmart30 Rmart30 is offline
FNG
 
Join Date: Oct 2016
Posts: 2
Default

Will this just show return line leaks, or would it also show injector body leaks?
Reply With Quote
  #19  
Old 08-28-2019, 02:13 PM
Dcon Dcon is offline
FNG
 
Join Date: Aug 2019
Posts: 2
Default

Great info! Thanks! I just did a Bosch OEM reman job on all eight. Got a small leak. 1 gallon fuel in oil in 1500 miles. Dreading tearing it down again, dont want to do both sides if I dont have too. Vacuum wont hold 15 # on the return line, plugged cb3 return. applied 15psi air and could not hear the leak in either valve cover. Would a stethoscope help me hear it? Figured I could narrow it down and vacuum check a side to see if it is or isnt the leaking side, if I could get to the fitting outside on the head. I have a Cali LB7 truck with all the EGR crap.
Which side would be easier to get at the fitting with? I was thinking of modifying a 8x1.25 zerk to hook up to the port, or use the rubber ends that come with the mighty vac for testing since I dont have a spare banjo.
Thanks for all the help!
Reply With Quote
  #20  
Old 08-28-2019, 02:29 PM
2004LB7's Avatar
2004LB7 2004LB7 is offline
Hotrodder
 
Join Date: Dec 2010
Location: Norcal
Posts: 2,045

Default

You need to vacuum test each bank to teel which one it is. Connect the vacuum to the port on the head

I doubt you will be able to hear anything. Especially if it is as small as you say
__________________
2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
Reply With Quote
  #21  
Old 08-28-2019, 06:41 PM
Dcon Dcon is offline
FNG
 
Join Date: Aug 2019
Posts: 2
Default

Quote:
Originally Posted by 2004LB7 View Post
You need to vacuum test each bank to teel which one it is. Connect the vacuum to the port on the head

I doubt you will be able to hear anything. Especially if it is as small as you say
Thanks for the reply. I figured if I could get to the easiest side and check it, if good, the other would likely be the leaky side. I will test it several times. Just trying to minimize the labor.
I think ill try to get the the drivers side port 1st ????
Interesting when I had it apart for the injectors, some of the factory installed return lines were only finger tight!
__________________
2003 Silverado LB7
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 05:48 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vB.Sponsors