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Old 09-01-2009, 08:25 PM
Pure Diesel's Avatar
Pure Diesel Pure Diesel is offline
Randsburg Drifter
Join Date: Apr 2008
Location: So. Cal.
Posts: 589


Originally Posted by Hawk355 View Post
Ok, this is my truck we are talking about here.

For starters I would like everyone to know that this thread should NOT be about weather or not it can be done, or why one would want to do it, but more "how it was done".

I’ll try to answer some of the simple question now but I don’t have time to go into details at the moment. I will look for the procedures that I wrote up (over a year ago) later this week. Along with posting a few pictures.

I have 35,000 miles currently on this dyno proven 600rwhp daily driver to back up all of my statements.

For those that WONDER WHY: My injectors failed at 160,000 miles and they replaced all of the fuel lines on top of the engine including the fuel rails due to corrosion. This time was under warrenty and it would have cost me over $3,800 if it hadn't been. So if I had put another 160,000 miles or so on the engine they would probably have failed again. But the engine didn’t make it that far, long story short it locked up 25,000 miles later. The block and pistons were scared really badly and I wanted to get the injectors out from under my valve covers for ease of access and safety. The LLY has dry injector cups witch means there is no coolant surrounding the injectors that can leak into the cylinders (this was the cause of my LB7s failure).

1. This LLY is setup like a LB7, NO EGR OR EGR COOLER!!! AND NO VVT

2. I’m using the stock LB7 ECM and FICM

3. The voltage and wire location between the two computers are identical from 2001 to at least 2005

4. The voltage to the Injectors may be different. This is why I’m using the FICM from a LLY (A Bosch engineer told me that all of the injectors that they supply to GM run off of a 12v supply line. He also told me that this engine would never run in my truck! 5 minutes after I got off of the phone with him the truck was running!!)

5. I spent more time studying the wire diagrams on the LB7 and LLY then the time it actually took me to install the engine.

Again I will post the detail later this week when I have time.
The Diesel shop, that I buy from and have work done to my truck, had the same theory of the cooling around the injectors as the cause for failure. He doesn't believe the voltage is the problem. Its the cooling and heating cycles.
White GMC 2003 2500HD D/A SLE/CC/SB 4x4] Bilstein 5100~Air bags~Autometer Gauges~33 BFG's~MBRP 4" Exhaust~SD tie rod sleeves~Cognito Braces~Kryptonite upper control arms DMAXSTORE XD TIE RODS~PPE high flow pick up~Fass 95 pump~Titan 52-gal.~Prodigy~New tranny 02/12/2015 Mike L. "Baby Frankenstein " w/Goerend converter w/ Mike L. tranny cooler and pump rub fix~6 speed tap shifter~Siege Engineering Anvil train horns(Very Loud)~LED headlights Hi/Lo
New injectors as of 03/12/2010 @ 80k miles
Injectors started going again at 115k. 07/01/2013
06LBZ engine transplant from Russ @ RPM Motorsports~No more Lb7 injectors to replace

Last edited by Kat; 09-05-2009 at 11:31 AM. Reason: Fixed #2
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