Is this piston okay to run? (pics)

[gieri002]

Is this piston okay to run? Ive seen some pretty good sized marks but never one like this. All the other pistons are fine.

 

[BogusSVO]

Personally, I would replace the piston, Those dents in the piston will weaken the crown.

My question is what happened to break the valve in 3 pieces?

 

[krh195]

I agree with almost everyone here, I would not risk it. If you are going for a stock motor replacing it would be very cheap.

 

[XiKeiyaZI]

It will be atleast 40 bucks to have it checked for cracks. You will have to hone the one cylinder and buy new rings for it also. Right there you are looking at more than it cost to buy a new set of pistons and rings.

Which is why I said, initially, that I would purchase the replacement. check up a post or two.

 

[Bricktop]

The sharp edge is a perfect catalyst for a hot spot. A hot spot is exactly what it sounds like. It's a area of a piston dome that glows hotter than the rest of the piston. The hot spot area can and usually will promote pre-ignition (detonation), which can eventually destroy the piston and/or rod bearing among other things. Many people even go as far as to smooth out the edges of valve reliefs on brand new pistons to reduce the chances of hot spots. In many cases when the valves contact the pistons, it leaves a mark that is decently wide and not very deep. These are easy to file smooth and reduce edges. Your one mark there is narrow and deep, and it will probably not be possible to clean up well enough.

Agreed. Replace them.

 

[Colt4G63 also]

The piston could be cracked also. When exposed to combustion conditions it could come apart and you will end up having to pull it apart again.

^^^ This^^^

It's not worth the risk. Have you looked at it from the bottom?

 

[BogusSVO]

Look at the "1" at the end of the part number, on the outside bottom of it, there is a scratch/crack/line that runs at an angle.

Like others have said the NPR pistons and rings are cheap enough.

 

[gieri002]

Ah, good find. That is actually just a piece of hair. I would love to throw new pistons in the car but I do not have any of the tools needed to do it myself.

 

[Honto]

Drop the pan, unbolt the rod and push up. If you pulled the head, why wouldn't you be able to drop the pan?

 

[buhay6]

mizzumo kit for $160 dollars? that's a deal and a half! where can you get one of those?

Ah, good find. That is actually just a piece of hair. I would love to throw new pistons in the car but I do not have any of the tools needed to do it myself.

if you got that far you should have most of the tools you need pistons aren't hard to do neither are crank/rod bearings either.