I have a 2003 LB7, 4x4 ZF6 single cab
Bought it from the original owner with 140K, 4 years ago. Bone stock except for single mass flywheel conversion. Currently has 229K, just put in a Southbend clutch, LB7 flywheel (original owner had an LLY flywheel in there) and ARP flywheel bolts. The only other upgrades I've done are KB Diesels steel clutch pedal (stock plastic one failed), Merchant Auto transfer case (pump rub did me in), ARB front bumper / 12k winch (after I hit a deer), K&N cleanable air filter. No tunes, and the engine is the low output CA emissions version.
Im dealing with a fuel issue that prompted me to rebuild the factory hand primer, replace the banjo washers at the FICM, and replace the Fuel Pressure Relief Valve, none of which solved the issue. Extended cranking times (15 to 30 seconds on every start), engine will only start cold. No hot starts at all. No cold starts in hot weather. Truck runs perfect once its on (runs better than when I bought it, thanks FPRV). Original owner claimed injectors were done at 100k. I have not replaced injectors in my ownership, and Im thinking they have high return rates. Rather than drop the coin on injectors + cups + CP3 and whatever else... there's a low miles LBZ engine (116K) for the same price that's for sale close by.
My goal for this truck is to reach 700K miles with proper maintenance but minimal intervention on my part. I have an aluminum van body on the bed, I drive coast to coast, and throughout most of Mexico. For me, Reliability is KEY. I have no doubt the LB7 can hit 700K (with 5 more sets of injectors). What all would I need to swap in the LBZ? The owner claims its an 07.
From digging around on the forum here, it looks like:
-2007 LBZ Engine
-2006 LBZ / LLY ECM for manual trans (since 2007 didn't have option for manual trans)
-LLY flywheel (still got the one from original owner, not missing any teeth).
-LBZ wiring harness on engine / under hood
-LBZ throttle pedal / harness
The LB7 is a Base Model, no cruise control, steering wheel controls, etc.
Is there anything Im missing or any reasons this will not work?
Will the LBZ outlast the LB7 in bone stock form?
Are there any big ticket maintenance items on the LBZ that are not present on the LB7?
Would the fuel mileage differ? Currently enjoying 23mpg
Please reply from a reliability standpoint, my current LB7 has enough horsepower for what I do, even being the CA version.
Thank you for taking the time to read this.
Bought it from the original owner with 140K, 4 years ago. Bone stock except for single mass flywheel conversion. Currently has 229K, just put in a Southbend clutch, LB7 flywheel (original owner had an LLY flywheel in there) and ARP flywheel bolts. The only other upgrades I've done are KB Diesels steel clutch pedal (stock plastic one failed), Merchant Auto transfer case (pump rub did me in), ARB front bumper / 12k winch (after I hit a deer), K&N cleanable air filter. No tunes, and the engine is the low output CA emissions version.
Im dealing with a fuel issue that prompted me to rebuild the factory hand primer, replace the banjo washers at the FICM, and replace the Fuel Pressure Relief Valve, none of which solved the issue. Extended cranking times (15 to 30 seconds on every start), engine will only start cold. No hot starts at all. No cold starts in hot weather. Truck runs perfect once its on (runs better than when I bought it, thanks FPRV). Original owner claimed injectors were done at 100k. I have not replaced injectors in my ownership, and Im thinking they have high return rates. Rather than drop the coin on injectors + cups + CP3 and whatever else... there's a low miles LBZ engine (116K) for the same price that's for sale close by.
My goal for this truck is to reach 700K miles with proper maintenance but minimal intervention on my part. I have an aluminum van body on the bed, I drive coast to coast, and throughout most of Mexico. For me, Reliability is KEY. I have no doubt the LB7 can hit 700K (with 5 more sets of injectors). What all would I need to swap in the LBZ? The owner claims its an 07.
From digging around on the forum here, it looks like:
-2007 LBZ Engine
-2006 LBZ / LLY ECM for manual trans (since 2007 didn't have option for manual trans)
-LLY flywheel (still got the one from original owner, not missing any teeth).
-LBZ wiring harness on engine / under hood
-LBZ throttle pedal / harness
The LB7 is a Base Model, no cruise control, steering wheel controls, etc.
Is there anything Im missing or any reasons this will not work?
Will the LBZ outlast the LB7 in bone stock form?
Are there any big ticket maintenance items on the LBZ that are not present on the LB7?
Would the fuel mileage differ? Currently enjoying 23mpg
Please reply from a reliability standpoint, my current LB7 has enough horsepower for what I do, even being the CA version.
Thank you for taking the time to read this.
