Rust on Piston
#1
Rust on Piston
Hello,
My machinist left a piston ( Supertech P4-MA790-N10) out and developed rust and has small pits on top of piston. He cleaned it up and said "I wouldn't hesitate to use that in my own engine". The ring grooves have no rust/corrosion in them and looks to still have the phosphate coating intact. I plan to run between 8 to 20psi Max of boost on 93 Octane.
My question is: Will this piston be okay to use?
Thank you,
Drew
#2
well aluminum doesnt rust, sooo. sounds like he has a filthy shop.
But that piston has already seen detonation.
The real question is- would the machinist use this in his/her own hi performance boosted engine? i dunno, maybe. I hate the word "maybe" when talking reliability of anything expensive.
But that piston has already seen detonation.
The real question is- would the machinist use this in his/her own hi performance boosted engine? i dunno, maybe. I hate the word "maybe" when talking reliability of anything expensive.
#11
I wasn't in a rush because in that year span I was able to completely overhaul my miata. So now I just need to assemble this engine and drop her in.
He was recommended to me by 3 people so I went with him. Luckily he didn't screw up my oil tolerances, everything is money. However first and last time using him as he messed up this piston and my wiseco rings and it was a pain dealing with. I'm guessing it sat on the floor in the box and somehow water made it's way to it. I see the box had water on it.
I don't want to deal with him at all , so I'm going to just eat the cost on a brand new set. I already order again from Brad at Fab9.
Thanks for the replies Ryan.
#16
I'm new here, but I'll post all my photos in an album or start an intro thread.
Crazy thing is I got her for $500 on craigslist. She slumbered in this guys barn for 7 years. So it didn't look anything like it does now. Rats had fun with some wires and had a feces party all over her, surface rust here and there, but all the important areas in the chassis were good. The frame rails only had one incident with the road, but in general compared to others I've seen I got lucky.
Despite all that time she started up on the 2nd start. However, all the seals were shot on engine ...Now 3 years later I'm here .
Crazy thing is I got her for $500 on craigslist. She slumbered in this guys barn for 7 years. So it didn't look anything like it does now. Rats had fun with some wires and had a feces party all over her, surface rust here and there, but all the important areas in the chassis were good. The frame rails only had one incident with the road, but in general compared to others I've seen I got lucky.
Despite all that time she started up on the 2nd start. However, all the seals were shot on engine ...Now 3 years later I'm here .
#19
I'm glad I did.
@der_vierte I need to see this miataaaa.