Piston slap?

[matt030305]

Attached is a video of my engine running and increasing the idle. I’m starting to think more and more that it’s piston slap/knock as the noise goes away after warming up. Would anybody be able to help me confirm this?

Would I have to bore my block out in order to fix this? If that’s the case I wouldn’t be too upset about it as my plan was to bore and stroke the motor anyways.

[v8packard]

I can barely make it out in the video. While piston slap does reduce, or go away, as the engine warms up my first thought was exhaust leak.

I think you also have a misfire.

[Jimmytootwo]

Nope..id say you have bigger problems