Lift Pump. Need advice on why and which one. - Page 3 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax First Generation: 2001-2004 (LB7)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise

Duramax First Generation: 2001-2004 (LB7) Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Like Tree3Likes

Reply
 
LinkBack Thread Tools
Old 06-05-2016, 07:20 PM   #21 (permalink)
BigIron67
Diesel Fanatic
 
Join Date: Jan 2009
Location: Jacksonville Fl.
Posts: 144
iTrader Score: 0 reviews

For stock application it could be made to work if pump volume is enough.
Down side is that if pump fails, you do not go anywhere until you replace the pump as I do not think CP3 can pull fuel thru the gas pump.
Drop the tank or lift the bed.
Good side is if you run out of fuel you refill, turn on the key and the pump refills all the lines and filters, no hand pump priming. Unlike the Kennedy pump that cannot prime itself and requires hand priming or pressurizing the tank to bring fuel to the pump. A one way valve in sender fuel line could solve this problem. Kennedy pump will not leave you stranded as long as you have a good hand primer pump, may just take awhile to get it primed.

__________________
Bob C.
03 Chevy 3500 Crew Cab Dually LB7-Banks Monster Exhaust (single),Big Head,Speed Loader,Six-Gun Tuner,DynaFact Gauge Assembly,Ram Air Intake w/Scoop,Exhaust Brake-Transfer Flow 58/60 gal. under bed tank- remote Donaldson P553207 filter w/ WIF sensor- Nicktane OEM filter adapter and 1 micron filter w/heat shield. -BD aluminum trans. deep pan w/Sun Coast filter lock-06 trans. oil cooler and lines-Denali GPS/Stereo & CD player-RollnLock bed cover, used for towing 5th wheel only- now have EFILive FlashScan V2
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-05-2016, 08:44 PM   #22 (permalink)
TheBac
Bac To The Future
 
TheBac's Avatar
 
Join Date: Nov 2003
Location: Mid-Michigan
Posts: 23,043
iTrader Score: 3 reviews

IIRC, LB7s like 5-7psi pressure. Anything more and the engine will lope and the FICM seals will fail.
Modern gasser pumps push 55-60psi. You might be able to do it by using an inline regulator, but I'd bet the gasser pump itself would fail prematurely anyway.

__________________
Tom

"BBT" -- 2003 GMC 2500HD CC/SB 4x4 - 12.14 @ 111.15
"Kleshay" -- 2000 C5 Corvette -- the toy
"The Cruzer" -- 2014 Chevy Cruze Diesel -- the DD

Marlene (Molly) Bacon -- 1936 - 2019 -- RIP Mom
You're missed both at home and on the piano

Success is getting what you want. Happiness is wanting what you get.
Reality is a matter of perspective.


Last edited by TheBac; 06-05-2016 at 08:45 PM.
Offline   Reply With Quote Quick reply to this message
Old 06-06-2016, 11:24 AM   #23 (permalink)
BigIron67
Diesel Fanatic
 
Join Date: Jan 2009
Location: Jacksonville Fl.
Posts: 144
iTrader Score: 0 reviews

Tom,
FICM seals will fail. Do you mean internally or banjo fittings?
__________________
Bob C.
03 Chevy 3500 Crew Cab Dually LB7-Banks Monster Exhaust (single),Big Head,Speed Loader,Six-Gun Tuner,DynaFact Gauge Assembly,Ram Air Intake w/Scoop,Exhaust Brake-Transfer Flow 58/60 gal. under bed tank- remote Donaldson P553207 filter w/ WIF sensor- Nicktane OEM filter adapter and 1 micron filter w/heat shield. -BD aluminum trans. deep pan w/Sun Coast filter lock-06 trans. oil cooler and lines-Denali GPS/Stereo & CD player-RollnLock bed cover, used for towing 5th wheel only- now have EFILive FlashScan V2
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 10-09-2016, 12:06 PM   #24 (permalink)
Johnnydingding
Self Ignition
 
Johnnydingding's Avatar
 
Join Date: Dec 2009
Posts: 94
iTrader Score: 0 reviews

After hemming and hawing and dealing with a couple instances loosing prime over the summer months, I ordered and installed a Kennedy twin lift pump kit this past weekend. I was impressed on the completeness of the kit and the ease of installation. It's super quiet. Can't hear or feel the pumps running. I had to use a home made stethoscope to verify it running.
My hope is that this investment solves my loss of prime issue, help with cavitation of the fuel and helps give my truck many more years of trouble free service.
__________________
Jack




2003 Silverado 2500HD 4X4, 6.6L Duramax, Allison & NP263XHD
New injectors @ 145,000 (June 2011) and 211,000 (June 2016) * Kennedy Twin Lift Pumps * Nicktane Fuel Filter Conversion * PPE Boost Valve * 2" Ready Lift Leveling Kit * Banks Exhaust * SS Brake Line Kit * Hadley Train Horn
Offline   Reply With Quote Quick reply to this message
Old 06-02-2019, 11:22 AM   #25 (permalink)
Beareair640
Block Heater
 
Join Date: Nov 2017
Location: Gladwin County Michigan
Posts: 18
iTrader Score: 0 reviews

Why not just install a sump with return and eliminate the need to drop the tank at all?
__________________
MY BABY
2003 Duramax 2500HD, 4X4, 3"lift
118,000 Fass 165 lift pump, Beans dual sump.
Banks Exhaust, banks big head wastegate and Six Gun Tuner, Rear air bags
Pace Edwards Tonneau Cover, Bed Carpet
Offline   Reply With Quote Quick reply to this message
Old 06-02-2019, 02:42 PM   #26 (permalink)
BAMotorsports
Clutch
 
Join Date: Feb 2005
Location: Florida
Posts: 72
iTrader Score: 0 reviews

It's a pretty old thread(2016). My guess all the work has been already done.
__________________
Brian

2003 2500HD DuraMax EC SB 4x4 Allison
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 02:28 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide