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Discussion Starter #1
What is the difference between a JDM piston and a US 7MGTE? I would like to know if there is a difference that will affect emission or anything of that sort. Thank you.
 

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the clever guy
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What about ceramic coated crowns? My us 7mgte had uncoated piston crowns and my current jp 7mgte has coated crowns. The jp 7m is an 89+ so maybe it's a year based thing....

...in any case that difference won't be noticeable and won't affect emissions.
 
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THE PISTONS ARE THE SAME ,SOME OF THE TURBO MOTORS GOT THE COATING.FROM MY RESEARCH I FOUND THAT THE COATING WAS NOT TO GOOD OF A JOB BY TOYOTA,REPORTED TO BEGIN FLAKING UNDER XTREME LOADS
 

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Discussion Starter #7
I would like to know about the detail of the coating by years and engine model. Originally I thought that all of the toyota internals exposed to extreme heat are ceramic coating... i'm very disappointed about the things that I have read. more details please! thank you!!!
 
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