Wiseco Piston Problem

[ritalinpb]

Hello all,
I purchased a Wiseco piston on Ebay from "rj_atv". I sent it along with my top end to be bored and the shop measured the piston and it was machined wrong from Wiseco. The clearnaces were not correct. I have all the measurments and stuff the guy from CSA performance in Almont MI was VERY helpful. He contacted Wiseco they said they couldnt do anything cause the piston was purchased on Ebay (he didnt have a Wiseco invoice number). I had him order and measure a Numaur(sp?). I have emailed Wisco Customer Service twice and recieved nothing back. I am going to call them this week sometime. I was just wondering if they are pretty good with replacing bad stuff. I mean the micrometer doesnt lie. If its machined wrong its machined wrong. rj_atv wouldnt respond to me on Ebay and unfortuneatly I left positive feedback cause I recieved the product and didnt know it was bad. I just want a replacement so I can sell it back on Ebay so I can recoupe some cost. Im a fair guy and dont want to sell a bad piston to someone so they have to redo the top end. Let me know what you guys think!
Thanks
Matt

 

[Paulie B]

Call RJATV 727.378.8548 and see what he says.
He will probably let you return it for another provided you didn't destroy it or something.

 

[ritalinpb]

After I first emailed rj_atv with the problem I recieved an email asking how I knew the piston was bad from and when I responded with the measurments that proved it was manufactured incorrectly I recieved no response form rj_atv. The piston is not destroyed at all. Only thing that touched it was a micrometer.

 

[super noober]

ive had dealings with rjatv and they have been good to me, mabey they have just been busy. never heard of anybody trying to contact wiseco though...

 

[pittboss45]

How are the clearances off. The cylinder is to be bored to the piston with the .002 clearance taken into consideration at the time of machining. I'm not too sure of what you are saying,,

 

[ritalinpb]

Here are the notes from the machinist that measured the piston. “Upon measuring piston for proper bore size, we discovered that the piston was machined improperly. The piston should be as described, for a 67mm bore, minus the bore to piston clearance of .003” or .0762mm, which would make the piston diameter 66.92mm, measured 90 degrees to the wrist pin, ¼” to ½” from the bottom of the piston skirt. When we measured this particular piston, we came up with a measurement of 66.42mm near the bottom of the skirt and 66.75mm half an inch above the previous measurement. This concludes that the piston is not just mislabeled (bore size on top of piston crown) but rather machined improperly."

 

[Paulie B]

All pistons have a taper in them.
Looks like the piston was mislabeled and you were sent the wrong oversize.
Call him I:I

 

[sr5bidder]

but pistons are bigger at the bottom and tapper as they go up towards the rings

 

[Wildcard2]

Give John (RJATV) a call. He is one of the best there is to deal with in this industry and he'll do you right.