Rods

[5LTREATR]

What are the odds of bending rods with 450 rwhp.

 

[gmduramax]

Not likey. I would be more worried about cracking a piston

 

[hondarider552]

x2, but then again, it is possible.

 

[LBZ]

What are the odds of bending rods with 450 rwhp.

In your '06, not likely. LB7's/LLY's maybe more likely. LBZ weak point is the pistons.

 

[5LTREATR]

is there any way to know if your rods are bent other than a compression test.

 

[gmduramax]

Not that I know of.

 

[TheBac]

is there any way to know if your rods are bent other than a compression test.

a hole in the side of the block.

 

[SSchmi5519]

a hole in the side of the block.

nahhhhh

 

[Mike_S]

Excessive blue/grey smoke and a rough idle would be indicators...but other than that a compression check is your best bet.

 

[rcr1978]

If all are bent but probably not likely, what would one say for pressure would you be concerned? Other than that would 5-10% diference be a concern? Or if there is bent a one is more than 10%?

 

[Gmclbz]

a hole in the side of the block.

:rofl:

 

[TheBac]

Excessive blue/grey smoke and a rough idle would be indicators...but other than that a compression check is your best bet.

This was going to be my answer, too..but I decided to be a smart ass instead. I need some humor today.

If all are bent but probably not likely, what would one say for pressure would you be concerned? Other than that would 5-10% diference be a concern? Or if there is bent a one is more than 10%?

IIRC, its not necesarily the number you're looking for, but consistancy. Gauges can read differently. Ben once told me that a good running LB7/LLY should be somewhere around 400psi., so that can give you a start.

When we did my truck recently, the numbers looked like this:
1) 325 psi
2) 310
3) 340
4) 340
5) 360
6) 330
7) 315
8) 285

So that gives you an idea of what you'll see if the rods are tweaked.

 

[rcr1978]

Bac how many where actualy bent? Looks like number 8 for sure possibly 2 and 7? My best guess

 

[TheBac]

The only one I suspect isnt bent is #5. #3 and 4 might be ok, but I doubt it. Motor comes apart next month, so we'll see then.

 

[rcr1978]

What give you the ideah to suspect it before the compresion test?

 

[TheBac]

Truck started smoking to beat hell when I started it in the AM as the weather got colder, but the smoke would go away after a couple miles driving. Also noticed the smell of diesel in the cab from time to time. Checked balance rates, and they were all sorta out of whack, but not "injector replacement" bad....and a couple were high positive, which spooked me.
Since I had pushed the truck this year, I figured it was either injectors or rods. I had Eric do a comp test and now here we are. (At least I dont need injectors yet)
Set of LBZ's are soon to be on their way.