Problem with JE Piston
Problem with JE Piston I got a set of sweet looking 4.03 4.00 pistons inboard forged from JE. They were shipped to Polydyn in Houston to get coated before I got them. My block and rotating assembly was already at the machine shop so I dropped the pistons off with them as soon as I got them.
I'm sitting here tonight building this shortblock and I grab the piston for the #6 hole. After it's assembled I try to slide it in the bore and it doesn't fit. I grabbed my T-Gauge set and mic'd the hole out thinking it was a machining problem. The holes were all within several ten-thousands of each other. I slide the piston in crown first and it fits fine. So I mic out the skirt and it's 4.054!
The first thing I thought is... they went way to heavy on the coating. The coating is exactly like the other pistons. I took an emery board and knocked some of it off and it's microns thin...
So basically what I've got here is an expensive COATED piston that isn't worth hitting a hog in the *** with. Polydyn missed this somehow... The machine shop missed it.
I just needed to rant. I was really looking forward to building this block tonight. Has anybody had any similar problems with a piston? How's JE's customer service? They were closed before I found the problem. Being that the piston is coated I wonder if they're going to give me any ****.
Also, What's your opinion on running one piston uncoated? The crown is ceramic coated and the sleeves have their oil slinger formula. This would probably make a difference in the cylinder temperature.
Thanks,
Andy
I'm sitting here tonight building this shortblock and I grab the piston for the #6 hole. After it's assembled I try to slide it in the bore and it doesn't fit. I grabbed my T-Gauge set and mic'd the hole out thinking it was a machining problem. The holes were all within several ten-thousands of each other. I slide the piston in crown first and it fits fine. So I mic out the skirt and it's 4.054!
The first thing I thought is... they went way to heavy on the coating. The coating is exactly like the other pistons. I took an emery board and knocked some of it off and it's microns thin...
So basically what I've got here is an expensive COATED piston that isn't worth hitting a hog in the *** with. Polydyn missed this somehow... The machine shop missed it.
I just needed to rant. I was really looking forward to building this block tonight. Has anybody had any similar problems with a piston? How's JE's customer service? They were closed before I found the problem. Being that the piston is coated I wonder if they're going to give me any ****.
Also, What's your opinion on running one piston uncoated? The crown is ceramic coated and the sleeves have their oil slinger formula. This would probably make a difference in the cylinder temperature.
Thanks,
Andy
i'm running JE pistons in my 383 stroked motor. There customer service is A+
I have no doubt they will take a look at that pistons (even coated) and replace if fault is on their side.
I have no doubt they will take a look at that pistons (even coated) and replace if fault is on their side.
