is this piston still good?

[tmaxx411]

is this piston useable? its no deeper than the factory valve recesses.

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[92AWDHX40]

looks ok bad pic though why wouldnt you want to use it, why is the head off?

 

[silicosys4]

I would be worried about raised bits of metal from that gouge acting as a heat sink, causing detonation and knock.

 

[tmaxx411]

Head is off to check for bent valves. I can smooth them out with a dremel, thats not a big deal. I was just curious, since this is the only damage I found.

 

[donniekak]

I would pull them to check that the rings still rotate freely. Sometimes when they smash the valves the piston smashes enough to bind the top ring. But otherwise, smooth them out, they'll be fine.

 

[BogusSVO]

The rings on the pistons may or may not be pinched, you need to find that out before you move on.

To check for pinched rings.

> Roll the engine over so all pistons are at mid stroke
> Pour equall amount of oil on top the pistons
> Walk away for 4 hours to over night
> When you come back and check, the amout of oil should be the same in all 4 holes, if one is much lower or empty the rings are pinched, and the pistons need replaced. IF the oil level is the same and hasn't gone down alot form what you pourd in, buff out the dings in the pistons to get rid of hot spots, and bolt your head on and go

Yes this was edited, cut and pasted from another thread from earlier today, I was being lazy.
I will have to make a "How to" for this...