LBZ Pushrods - 06 vs 07

[Mikey]

I have 2 LBZ motors. 1 from an 06 truck and 1 from an 07. Upon taking both motors apart, I found that the 06 push-rods had the oil lubricating holes in them and the 07 ones were solid.

My question is, which are better? Maybe the solid ones are better because of strength? Should I put solid ones in the 06 block? Will everything get properly lubricated on the top end?

 

[Mikey]

anybody have any info?

 

[duratothemax]

The LB7's didnt have hardened rollers on the lifters, so they needed oil to come down through the pushrods and lubricate the rollers/lifters.

Starting with the LLY in 04.5, they made the lifters/rollers hardened, so they didnt need the auxiliary oiling/lubrication. So technically, any 04.5+ duramax (lifters) dont need the pushrods with the holes in them.

The reason a lot of 04.5-06ish duramax's had them anyway was because GM had a surplus of them and so they figured they might as well use them up, even though 04.5+ dmax's dont need them.

So basically, if you are working with LB7 rollers/lifters/dmax, you MUST HAVE the pushrods with holes in them.

If you are working on a 2004.5+ duramax, it doesnt matter which pushrods you use.

 

[Mikey]

Should I use the solid ones for the added strength?
Does it matter which lifters I use if there is a change?
Thanks!

 

[Sledheadxp800r]

Ben Do aftermarket pushrods have to oil supply hole in them? Will lbz lifters need to be installed into an lb7?