the retainer broke down because of that the valve was released, if it hit the piston but that was not the one that broke, the broken piston had no blow just this one broken (Knock I think), it has a month working since the camshaft was installed , I was doing a tune by email, I was in the last detailsCould just be post carnage observation were the valve locks (valve collets) seated in the valve groove fully? These are really misleading when installing under tension in a motor, they appear to hold but and then at first push of the valve slip off the valve stem. This may have caused the valves to drop and impact the piston landing, the valve spring retainer (washer / disc on the spring) could have been secondary damage once the valves had dropped and the cam kept hammering the spring.
I am considering putting only the forged piston using the OEM rod, I don't know where I can get them, I think they will be a little more reliable. boost or nitrous are not yet in my short term plansBest solution depends on your budget and skill. Rebuild the engine, buy a new engine, or source a wrecking yard engine. Definitely need to figure out what caused it to break retainers, drop valves and break ring lands.
Yes, it would be helpful to see with a seller what options I haveLooks like it jumped timing. Maybe the tensioner bolts? I’m sure you could reach out to one of the vendors on this site and buy a take off piston and rod from them. Weisco sells individual ring packs. If the cylinder is not scarred you can drop the oil pan hone the bore and replace the piston.
the valve and the spring are fine, I guess it was the knockDid they check for valve spring bind? At this point with the mods you have going on, I would go with a forged rotating assembly. Ringland failure, like you had is not uncommon with a tune if you run fuel below the recommended grade.
Just a heads up, forged pistons can be noisy.I am considering putting only the forged piston using the OEM rod, I don't know where I can get them, I think they will be a little more reliable. boost or nitrous are not yet in my short term plans
I think this makes the most sensewith all the pieces broken on multiple spring retainers - this looks like coil binding.
Eventually the stress and metal fatigue created the failure of the retainers. The one where the entire retainer failed allowed the valve to drop and struck the piston.
That engine was not far away from having multiple valves drop as the other retainers were failing
good spotting that - that looks like the lower side of head by the block (black paint on 5.7 blocks) and if that rocker shaft was installed like that, its not correct.From this picture it looks like you have the intake rockers installed where the exhaust rockers should be (pushrods would have to be swapped as well)? Could that have been your problem? Maybe I am looking at the image wrong...that aftermarket intake threw me...nevermind. I take it you were running a phase locker/limiter? Another member here had engine work done and it turned out the pin holding the phaser to cam sheared.
If that is the case then the springs should not have any binding issue.This is the kit you install, they are very similar