In the second picture, it looks like there is some debris sitting on top of the piston that is suspiciously walnut-colored.
Is it possible that some of the media made it into the cylinder? I could *maybe* see that causing the issue if it interfered with the piston moving. Say, if it managed to get jammed between the piston and the cylinder wall. (But, I could be seeing stuff that fell in after the head was removed or whatever.) I'd expect that anything that made it past the valves when they were blasted would have been blown out through the exhaust already, though. So, I scratch my head.
Another question: where is the missing piece of the piston? Was it in the cylinder? If it made it past the rings - which would be quite a feat - it could have caused other damage when it made its way into the oil pan, or possibly interfered with the rod. BUT, if you're replacing the whole thing anyway, it's pretty much irrelevant.
Sorry this happened - that really sucks. The LDK should be a fun installation. If you have the budget, I'd go ahead and do an aluminum flywheel while you're at it.
Regarding the injector question: you can use your existing rail and injectors. OR, you could go with the Opel injectors. They flow about 12% more than the stock units. If you're thinking about E85 in the future, that is the first step. (C7 HPFP would be next.) If you're budget constrained, I'd skip the $400 and just re-use yours. (If it's a long block, doesn't it come with the injectors?) And, of course, you'd need to modify your tune slightly if you use different injectors. If you have HP Tuners, I can give you the values for the parameters that need to be changed. It's pretty straightforward.
If you have Trifecta, I'd have no idea how to do that and, since the ECM is locked, HPT won't be an option.
Blue-ish 2006 2.4, Werks stage 1 turbo, Borla cat-back, DDM braces, Spec aluminum flywheel, Spec stage 2 clutch, Werks aluminum radiator, some gauges, RKSport hood, Morimoto FX-Rs, GReddy Profec, Norm's fenders
'07 GXP, Werks Big Wheel K04 and tune, Solo catless downpipe, TCE Wilwood 6 piston front brakes, 4-piston rears , stainless brake lines, slotted/drilled rotors, BC Racing BR coilovers, Performance Autowerks intercooler, DDMWorks CAI, charge pipes and braces, RPM rollbar
Last edited by raygun; 06-23-2019 at 03:22 PM.