[smokey30265]

I can't seem to find what the cylinder shaped thing is before the muffler on my 04 lb7. Some say its a cat some say its a dpf. What is it?

 

[lubeman1969]

Definately not DPF....that didnt come till 2007.5.

 

[smokey30265]

Definately not DPF....that didnt come till 2007.5.

So a cat with no o2 sensors?

 

[lubeman1969]

No o2's on the diesel. Not sure what the bump is, I didnt think the LB7's even had a converter on them...someone else help me out here.

 

[smokey30265]

No o2's on the diesel. Not sure what the bump is, I didnt think the LB7's even had a converter on them...someone else help me out here.

I think I remember hearing something about california trucks having them but my truck was first sold out of georgia

 

[Hondarider552]

only cali lb7 trucks have cats on them, and egr.

 

[smokey30265]

only cali lb7 trucks have cats on them, and egr.

is there any way to find out if my truck was a cali truck?

 

[Hondarider552]

Do you have a cat and egr....?

 

[smokey30265]

Do you have a cat and egr....?

I think its a cat. that's really the only thing it could be I guess and how do I tell if I have egr?

 

[Hondarider552]

pop hood, look on inside of passenger cylinder head, about a foot long and looks like a sideways coke can.

 

[H.O.T. Diesel]

Either its a California lb7 truck, or an 04.5 lly and you just don't know it yet..

 

[smokey30265]

pop hood, look on inside of passenger cylinder head, about a foot long and looks like a sideways coke can.

Yup, It has egr. Does the egr hurt efficiency of the truck any? I know the cat does.

 

[smokey30265]

Either its a California lb7 truck, or an 04.5 lly and you just don't know it yet..

this may also be a possibility. let me go check the build date.

 

[smokey30265]

date on the driver door is 06/03. That wouldn't be an LLY would it?

 

[smokey30265]

any more help?

 

[gr8shot]

easiest way is to check the 8th digit of the VIN. if it's 1, then you have an LB7, if it's 2 then you have an LLY

LLY's all have a cat and EGR.

-Jesse

 

[smokey30265]

easiest way is to check the 8th digit of the VIN. if it's 1, then you have an LB7, if it's 2 then you have an LLY

LLY's all have a cat and EGR.

-Jesse

Just checked the vin and its an lb7. Does the egr and cat hurt the performance of the truck? I guess what I am trying to ask is it worth it to take off these parts?

 

[Meyerperformance]

I would block the egr,and do a full exhaust. Opening up the exhaust will help performance a bit.

 

[smokey30265]

I would block the egr,and do a full exhaust. Opening up the exhaust will help performance a bit.

it seems like the egr would raise egt's

 

[Meyerperformance]

The primary reason for blocking it is keeping the engine cleaner running.