Ok to reuse these pistons?

[JuGs]

Ok I have a set of ross pistons. All look pretty good but one is really iffy. Its smooth but has alot of minor pitting I think. Heres pictures of all the pistons. Hopefully they are reusable.

 

[SoNew]

I honestly don't have much experience in pistons, but that does not look good my Wisconsin friend. Where did you get them?

 

[bastarddsm]

Make sure nothing is stuck in the skirts or the crown. Also make sure the ring lands aren't pinched. It will probably be ok. It might have slight detontation issues in that cylinder tho, but probably not.

 

[JuGs]

Nothing is stuck anywhere. Its just very slight pitts but in a mass ammount. I got them off a buddy of mine i thought i got a good deal on what i bought but after further inspecting them im seeing issues with the one piston. I might just have to go a differ route with pistons and see if i can give them back for another part i could use, if the piston isnt reusable

 

[willtmcgee]

From what I have read small pits like these can create hotspots and can could create some problems

 

[JonTorresGST]

from what i have read small pits like these can create hotspots and can could create some problems

+++1

 

[bastarddsm]

Think they will matter once it's run a bit and there is a nice layer of carbon on the piston tops? Doubt it.

 

[90laserdsm]

I would not use them, looks like some type of debris got in there. How do the sides of the piston look, because that's the more important part.

 

[TurboLaserRS]

Actually I retract my statement. I would run the last 3. The one in the 1st picture I don't think I would trust. Something happened to it that is not normal at all.

 

[NHerron]

I really hope someone comes by and confirms thats a sign of detonation. I had a very similar set of pistons, took pictures, made a thread, and no one could tell me what happened to them...

 

[JuGs]

the sides look great to me its just the top of the one piston im worried about.

 

[dsmcurse]

what happens if you try to rub the pitting marks out? maybe a small spray of WD-40 and a peice of purple scotch bite pad? are the pit marks deep? will they rub/buff out? have you tried to rub the pit marks every so carefully with a type of scotch brite or anything? i dont think that physically theres any major problem, but that extra "rough-ness" on top of that piston might cause heat to collect around all those tiny pit marks. if they rub out with not much effort then they might be worth using. best bet would be to take them to a reputable machine shop man and ask him

 

[JuGs]

i only rubbed them with my fingers and its still fairly smooth. they dont look deep at all to me. Ill have to find a decent shop around here idk if there is a good one close to me

 

[gs59_20]

Don't use! The integrity of your pistons could be compromised and you could eventually get cracks,which we all know are no good. If you need pistons I have a set of 2g pistons I could sell you with new rings as well. they're npr. brand new in box for the 2g turbo engine. The dome is coated. If your interested pm me. Not trying to make a sale,just giving you an honest opinion due to what my machinist has experienced with a lot of these dsm engines

 

[dylan702110988]

On my phone so its hard to see. But from what I can see I'm going to say its very minor. I would try to clean the tops. If the piston tops feel smooth and no huge pits, give them a try. Like some one said in the previous posts, once u get some carbon build up it really won't affect it much if at all.

 

[JuGs]

im not looking for stock....i was hopeint to keep forged since that was my build plan. the pistons r going on a set of eagle h beams. and the stock 7 bolt ones would need machining for the 6 bolt plus they wouldnt handle the power range ill be hitting on the motor

 

[gs59_20]

ooohhhh. If that's what happened to forged... Damn. What brand pistons are those?

 

[JuGs]

ross.....i got them used from a buddy.....idk where he got them.....

 

[gs59_20]

My bad,you stated that

 

[dsmornothing]

Personally I would Probably not use them. But in the case you decide to, Try to use a scotch brite pad on them and see if they come out at all. They CAN cause hot spots and detonation issues depending on how deep they are. But I think a scotch brite will probably take them out. And yes, That does look to be detonation pitting.

 

[JuGs]

yeah i think im going to go with different pistons. I talked to my buddy and im getting cams in replace of the pistons. I might just go with evo 9 pistons since they are forged and can handle my hp range. Thanks got all the help and comments.

is there any possible way to order pistons by just one?

 

[Idaho AWD]

I have seen incomplete sets come up for sale in the classifieds here from time to time.

 

[GSXtra]

I wouldn't use them, if you already have the engine down that far I would not chance it and need to rebuild the motor a second time because you wanted to go the Cheap route. I know from experience that if your that far you might ad well do it right and pay a little extra in advance so you don't have to spend more time and money in te long run