Originally Posted by dsouth
Yes that is a big hole in the top of the piston -probably right after it (valve) lodged sideways it the head. Where that metal went is what concerns me!!! My pic of the broken spring didn't come out very clear. The valve is snapped off like a twig (not sure if you can tell from the pic)
Chrysler is still planning to repair this motor which frustrates me - Chrysler Corp is involved at least as far as calling the service manager. SRT is also in contact. Seems as though the decision has been made to repair over my appeal to the top.
First...sorry for your bad luck.
My guess is that the valve spring or keeper broke, letting the valve drop down and contact the top of the piston. This snapped the valve stem, and caused the top of the valve to bounce around in the combustion chamber. How do the cylinder walls look?
If this were my car, I would be kicking & screaming if they told me their plans entailed anything short of a replacement engine. That blown engine has to be taken apart, completely cleaned (oil passages, etc.), new oil pump, lifters, all new bearings (possible undercut journals). The grit you see on the top of the piston is throughout your engine.
For them to say they will "repair" it, leads me to believe they are going to replace the head, and piston & call it a day... BAD NEWS!! That engine will never be the same with that kind of fix. I don't know for a fact that they are, but if these engines are balanced at the factory that modifies them, do they have the ability to install a matched weight piston (and rod, should you need it)? If not, the engine will no longer be balanced.
In my youth, I worked in an auto machine shop and have rebuilt countless heads & engines. (In fact I have an International Harvester 345cu engine on the engine stand right now.) I wouldn't consider myself an expert, but I have a pretty good backround in these matters.
My thoughts are with you.