Can anyone identify this loud tapping after fuel hydrolock?

[Hipster]

I have had con rod rod big ends reconned with pistons still on them. Not ideal but would still be looking for used con rod sssembly for crankshaft balance factors

 

[zzyzx]

The shiny spot on the piston skirt, is that from the counterweight rubbing it?

Yes.

 

[zzyzx]

What rings and bearings should I be getting? I see there's tons of materials they're made from. I'll probably be ordering from summit or amazon. I'm going to go with standard size unless my measurements tell me otherwise.

 

[tayto]

I would reuse the original rings. you don't need anything fancy for the bearings.. I would consider reusing if in good shape. i have seen problems when people do the "while I'm there" with engine bearings. unless you are checking clearances/machine work.

 

[zzyzx]

I got my hands on a used piston with rod. I noticed there is a little up and down play in the wristpin. While in the old one there's none, but it still moves freely. Is this normal? I measured about 0.0015" or so. I'm not sure my measuring setup is accurate. I can just barely feel it and hear it when i rock the rod.

Maybe the old one is just bent and that's why there seems to be less clearance.

 

[Erik the Awful]

There should be NO up and down play in the wristpin. The rod and pin should be able to smoothly slide side to side in the piston.

 

[Schurkey]

If you can feel play, there's too much.

I suppose you could MEASURE clearance between pin and piston pin bore, but only if you've got exceptionally-accurate and repeatable measuring tools, and only then if the piston and pin have been separated.