I just got my engine back together that I've been working on for months now, and even after the engine is warmed up I can still hear a noticeable knocking noise from the number 2 piston... i was just wondering if anyone on here knows what piston slap sounds like on these cars, i posted a youtube vid of the noise to show you what im talking about...

I'm still kinda lost for words, I've built half a dozen engines including 2 other lt1 ones so i feel confident I assembled it right... the only thing that could cause this is loose piston to cylinder clearance, right? All the machine work was done by a reputable shop here in Texas, G&G Performance Engines...

Heres the link:
http://youtu.be/zbI-tR0TpKw

 

I listened twice and it sounds like no oil not gettin to somewhere.(broken valve spring?)hope this helps.

 

I just wanted to follow up on this post, I bought a stethoscope and listened around the engine. It turns out that one of the rods is hitting the oil pan, I have a moroso pan which I thought was cleared for a stroker but who knows

 

What pan is it? The 20185?

 

Yep that's the one.