2007? 4500 engine lly or lbz

[regulator]

I bought an engine out of a 2007 bus, supposedly. I never saw the bus, I'm trying to get the vin from the bus company. I'm just going on the guys word that its an 07. Can anybody tell some differences in an lly and a lbz. I'm a dmax greenhorn and any help would be appreciated. Thanks

 

[WhitetailAddict]

It should be an LBZ.

Externally if the engine has a ficm that's a tell-tale of a true LLY, the intake horn is different as well.

Unless your talking an '06 LLY then the engine itself is the same (externally and internally) the only difference is the stock tune.

 

[regulator]

The injector harness comes back to a large connector on the top of the engine. I didn't notice a ficm in between there

 

[WhitetailAddict]

You have an LBZ.

That bail connector goes to the ecm harness. The LBZ's fire the injectors through the ecm tuning (Bosch electronics) where the true LLY's use a ficm (Delphi electronics), located on the right hand side valve cover towards the front of the engine.

 

[regulator]

Sent from my C771 using Tapatalk 2

 

[WhitetailAddict]

LBZ

 

[regulator]

Cool. What do you see thats obvious? Thanks

Sent from my C771 using Tapatalk 2

 

[WhitetailAddict]

The first picture is a dead giveaway.

 

[WhitetailAddict]

I should add, the lack of a ficm in the second picture was an indicator as well.