Are these pistons trash?

[whyteboi]

Just as the title says. I have a set of stock pistons I was going to use in a rebuild but they have these scratches on the sides. Just wondering if I should just get new pistons or if they would be safe for a stock rebuild.

37477

37478

Thanks for any information.

[Nikeboy355]

I would take them to a machine shop and ask them...
They can measure them and compare them with the rest of the pistons...

I'm assuming that you are taking the engine to the machine shop already to clean, check, measure, and hone the head and block...

The cost of a rebuild comes out to about $500-$1000 depending on how complete you are... A single damaged piston will only cost $40 so it really isn't a large expense in relation to the project...

[whyteboi]

Well all of them are like that on both sides. I was going to get the block checked but its pretty clean. Sill see the cross hashes in the cylinders pretty well.

[GroundPerformance]

Now that is some Piston slapping action right there.. :naughty:

[GroundPerformance]

I would ask to have your wall to piston clearance check. You might be out of spec already which causes that damage. You may not see it yet but if you check the bottom part of the cylinder you should see some section where this has been happening. Personally I would consider going oversize otherwise this will just continue to get worst and cause more trouble later on. Good luck!

[Firestorm]

i would get a new set of pistons. it is possible that their shape will only cause piston slap again, probably worse than before.

[estanislao]

i wouldnt be worried about the pistons i would be worried about the cylinder walls. and the gap is most likely gonna be different

[whyteboi]

I'll defiantly get new pistons. Thanks for the info guys.

[GroundPerformance]

I'll defiantly get new pistons. Thanks for the info guys.

Hopefully going oversize with those new pistons. Running same bore and with that indication will result in the same damage probably even sooner that you'll expect.

[whyteboi]

I was wanting to do a mild turbo build, so I'll probably get it bored over a bit and run a new forged piston since it looks like I'm going to need new ones. I figured I would just need to replace them.

[TweakTech]

If you are buying new pistons, take them to the machine shop with the block, that way the machinist can measure the pistons in the cylinder to make sure your piston to wall clearance is within spec as well! If the gap is too large, your new pistons will end up looking like your old ones haha :)

[rcdad123]

I was wanting to do a mild turbo build, so I'll probably get it bored over a bit and run a new forged piston since it looks like I'm going to need new ones. I figured I would just need to replace them.

don`t forget to take the forged pistons` spec sheet with you to the machine shop that is gonna do the bore and hone on your block so they can set the final bore according to the piston manufacturer`s spec. most forged pistons require much bigger piston skirt to cylinder wall clearance than stock to make up for piston expansion when they get to operating temperatures.

[whyteboi]

I will keep all that in mind. Thanks

[jacobs13]

Any good machine shop should ask for the piston spec sheet...

[AdrenalineS14]

Yup like some of the others have stated your block cylinders are "out of round" gonna have to take it to a machine shop to bore over and spec your new oversized pistons to wall clearance! SO DO IT! :D