Most the time it is the rods... but it will find the weakest part and take it out 1st... this happened to be the block on his..

On my motor it was all 8 pistons cracked and both heads.

I'm not going to say it was all DP Tuner but it had something to do with it as you can tell by the piston and the burns all the way out the the edge of the piston almost to the wall.

 

Survey Results

 

LOL

 

Rods stronger than a block... I would say that block had issues that would have surfaced eventually even if the truck was completely stock.

Cracked pistons and heads sounds like your motor got too hot to me, but as I said I'm new and just trying to learn some stuff here.

 

Did you not look at the picture of the piston???? There was so much timing on that motor that the fuel was almost hitting the damn cylinder walls

 

But we all know its normal to have the fuel spray on the cylinder walls...

 

I'll say it again... I'm new to this diesel performance game. Until I viewed this thread I had never seen a picture of a piston, much less seen one in person.
So I take it that the fuel is supposed to be sprayed in the bowl in the piston, and the marks on your piston show that the fuel is being sprayed outside the bowl? Okay, I can understand too much timing advance causing that. Wouldn't the truck run **** poor though if the fuel was being injected far too early? And I still think a cracked cylinder head and piston would be due to a lot of heat on a continued basis.
It sounds like after the last post by "Diezel Dawg" that the motor in "CSIPSD's" truck had a history of problems, and that it was highly modified even though he felt there was something wrong with it to start with (though the info seems to be copied from somewhere else and is missing a few links it seems). Modifying a motor that seems to be having troubles to start with doesn't seem like the greatest idea to me, and probably contributed greatly to the ultimate demise of that motor.

 

It is somewhat normal to have a bit of spray outside of the bowl. It is not normal to have it hitting the side of the cylinder walls.

Diesel Dawgs post was cut and pasted from another site, I have no issue with him reposting it if he gets it correct. It would be better if he had something to say himself rather then use someone elses work...

I felt my motor had to much blow by. It was checked and found to be within the normal limits, which they leave out.

My first motor went over 100k without issue. Running stock injectors, stage 1 injectors, stage 2 injectors and hybrids.

When I switched to hybrids there was a slight issue with the injector install which cost me the motor. My fault, never said anything differant. But appon tear down there was nothing wrong with that motor other then the one piston I melted down. No star pattern, no cracked pistons, no block issues, no head issues...

New motor went in, it was a short block, which I added my completly rebuilt heads, ARP studs, valve springs and everything else from the old motor. Only thing I changed is... The one thing I should not have. Tuning

First motor went 100k running upwards of 60% water/meth injection in testing, water injection nearly every day of its life. Higher EGT's...

Second motor made it less then 35k... running no more then 40% meth and most times just water, lower EGT's and more boost. When pulled, Every piston was cracked, heads were cracked, block was cracked... Bummer...

But hey, we all know tuning has nothing to do with blocks letting go...

 

What exactly are hybrids?
I still fail to see a connection in your case between a failed engine block and a power chip. In my mind, there had to have been an issue with that block in order for it to fail without something else failing first.

 

Hybrids are a type of injector, they are a AD body, with a BD plunger and barrel in them. This allows more fuel with less HPO demand.

Its not all that uncommon to blow the block and or rods out the side of the block... Click this Survey Results link and read up...