Hmm, well I've never had to tear down an engine that soon after building it. So I can't say if that looks normal or not. I know that those light scratches are nothing to be worried about though. I just don't know what to say about the coating.

If I was in your shoes, I'd run them and not worry about it. I'd just go through the process of measuring all of the clearances again during assembly. I wouldn't skip any steps this time.

 

Do those pistons use offset pins?

 

No offset pins. No steps were skipped last time, just getting bad information from 'industry professionals'...this **** is getting old. It really looks like the pistons were side loading in the bore, and if that is true I know exactly why.

 

Please go on...

 

Cylinder bores were likely too big. I gave the machinist the pistons and the specs that came with it. Wiseco specified .0035 PTW clearance, I come to pick the block up and it was .0055. Wasn't what Wiseco specs said but he builds engines for a living, all I could do was assume he knew what he was doing. He explained why it had that clearance, making more power makes more heat, etc.

 

Looks like too much cylinder wall clearance to me.

Also make sure you measure each journal in three spots then rotate 90* and measure again. It's not uncommon for the journals to taper which can lead to the same bearing problem again.

 

Beat me to it

Piston alloy plays a part in that tolerance too, which one did you use?

 

I used 2618s. They grow a lot, but certainly not more than the amount of clearance Wiseco specified.

 

Must be planning on pushing it pretty hard huh?

 

The pistons from my 410 looked similar, but I assumed it was from the one piston melting and metal fragments going everywhere...