Damaged pistons

[mod5v]

So I got this motor on trade and when I pulled it apart I found 2 pistons with top land damage. They are SRP forged flat tops. I was just wondering what would cause this kind of damage. Maybe got hot and seized in the bore? Or maybe just to tight clearance.

 

[mod5v]

Another one

 

[RustyRatRod]

Ring ends butted together. I would check them all very closely. In fact, I wouldn't run any of them just because.

 

[mod5v]

Ah ok I will check a couple of the ring gaps just for my curiousity. One piston had a valve drop but when I tore it down I found these other 2 also. So am trying to decide if I buy 3 new pistons or a complete set. It has been internal balance +.040 360 so I would like to keep pistons as close to the same weight to keep rebalancing to a minimum.

 

[RustyRatRod]

All the more reason for a complete set, IMO.

 

[Max1196]

This guy put 'regular' in, but only once! You may of had a lean condition or a timing issue possibly. There is a hint of the top ring rubbing ends like RRR suggests also.

 

[MOPAROFFICIAL]

Lifted and melted the ring lands at the thinnest spots, lean, anywhere else...end gap gap issue as well.

 

[famous bob]

Ring ends butted together. I would check them all very closely. In fact, I wouldn't run any of them just because.

too tite on ring end gap, not piston clearance.

 

[RedFish]

Just curious , which cylinders were those ?

 

[moper]

IMO - Went lean, burnt the piston and overheated the top ring.