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- #41
I guess I am just trusting the dealership service team on this... they said the engine is seized due to the cylinder 5 valve spring breaking off and getting into the combustion chamber.Back on the original topic, I reread the original post. A "spring" isn't "inside". At least I hope there is nothing in my cylinders but rods, pistons and rings. I sounds like you broke a valve spring (top of the head, between the head and top of valve under the cam) and dropped a valve, which the piston smacked on its way up. Maybe it isn't really seized but has a bent valve stuck half open preventing full revolution of the crank. Or the valve dropped completely and is wedged between cylinder and piston.
Or broke a ring. But its harder to see that seizing the engine.
I really want to see this torn down.
I'm not sure why the concern about rebuilding a seized engine. If the block isn't cracked (unlikely), the cylinder walls have enough meat to be bored to take out any gouges from the broken stuff knocking around in the cylinders, the caps can be align honed, and the heads are OK have at it. Worst case source a used short block, crank, rods or heads depending on what can't be rebuilt. And if you have ever considered a supercharger, lower compression a bit and consider upgraded rod bolts and forged pistons.
The real trick is finding the right engine builder.