<VV> Engine noise question

[NicolCS@aol.com]

This sounds like a cracked piston skirt, loose rod bearing, or bad flywheel.  
If your engine is/was prone to detonation/spark-knock, detonation can cause 
broken piston rings (like you had) and cracked skirts.  Perhaps you had a 
cracked piston skirt and didn't notice it when you repaired the rings. Another 
possibility is the flywheel.  Usually a flywheel rattle will go away when the 
clutch is pushed in.  You can isolate the cylinder by pulling the plug-wire on the 
suspect cylinder and seeing if the noise changes.  

Driving the car 40 miles at is likely to cause the problem to develop and 
spread metal throughout the engine (and get more expensive to repair).  I'd 
trailer it.

Craig Nicol

<snip>I originally sent this to Matt offline, but got to thinking he might 
not 
check his mail for a while, and I need to decide a course of action by later 
this afternoon, so I am sending it out to VV for a bit of advice on how to 
proceed. -   
I pulled into the parking lot at work and as I reved the engine above idle, I 
could hear a knocking, sounding like it was coming from the center of the 
engine. 
As I would flip the throttle, raising it above idle, it would make the 
knocking sound again, coming from the center of the engine, I believe.  The 
knocking would get louder the higher the revs, and disappear, or almost 
disappear at 
idle.<unsnip>