engine failure

another possibility is the cooler nozzles were not removed and were damaged during liner installation.

 

Horrible thought but maybe they were removed and then left in the tech,s overall pocket

 

Those pistons look very new. I have been burnt by pistons before made by interstate mcbee. I did a 60 series detroit ddecIV and in 50,000 miles three of the pistons scored up liners. I had all new piston oilers all the bearings looked great no damage to nothing else just liners and pistons. I'm not sure but I wonder if it's the meterial there made from caused them to swell. Needless to say put factory pistons and liners and no more problem. I will never use aftermarket ever. It made me look bad like I did something wrong. Put it back with same oil pump and oilers and it's got about 600,000 on it now and no problems. I'm not sayin it's your problem just tellin a story that's all.

 

Well is there any tuning done to ecm?

 

Excessive heat will have the underside of the piston discolored. Remove the rod and wrist pin to confirm this. If no extra fuel was introduced to the engine through either ECM tuning or a larger injector to create the extra heat, than you would have to look at a lack of air from the turbos creating the problem.

If there is no signs of excessive heat on the undersides of the piston then I would think the problem was the aftermarket pistons.

You need to determine what caused the issue before putting the engine back together, otherwise you may be doing this again in the future

 

No I understand it is not the tuning. I believe it is the pistons being aftermarket but I would investigate other things just as haney said.

 

You should always run a Bore Micrometer down the Liner after its been installed with the seals to ensure no deformation of the bore is evident for reasons such as O rings rolled etc.
Set the Mic to 0 at the top of the bore and chase it all the way to the bottom and at 90deg intervals.