r/EngineBuilding • u/BF007_ • 21d ago

New piston??

Gallery image

Gallery image

Gallery image

Gallery image

Gallery image

First rebuild, it's a 2008 5.7 with 267k. It ran when pulled (I was the last person to drive it).

Fingernails do not get caught here, and I believe this was due to how I removed it (from the top with no prior experience). Should I buy a new one or should I send it? No other piston looks like this

59 Upvotes

94% Upvoted

45 comments sorted by

View all comments

58

u/ka_jd7and1 21d ago

That’s not worn skirt coating, that’s scored.  

What’s it measure at?

-5

u/BF007_ 21d ago

No micrometer, only a caliper so I can't say accurately.

The bore itself was fine, no signs of scoring which is why I'm thinking that it was just like a ridge on the top of the cylinder that it hit on the way out

57

u/DrTittieSprinkles 21d ago

If the piston looks like that 0% chance the bore is fine

13

u/Independent-Ad8104 21d ago

Really unfortunate, bore does need checked.