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6MT Engine Tear down Results (Reman w/85.2k Miles)

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Old Sep 20, 2016 | 07:47 AM
  #1  
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6MT Engine Tear down Results (Reman w/85.2k Miles)

Car: 2004 Mazda RX-8 6MT
Prod. Date: August 2003
Engine: #3

These will be the internals that came out of my Mazda Reman. The Reman went in sometime 2006 at 16.8k & pulled at 102k so about 85k miles and about 4 other owners.... so this poor thing was abused before me! There is no consistent report of oil changes or any maintenance etc. Coils/plugs were done at about 100k and have proof but besides that. No clue. Enjoy the pictures!!


E-Shaft: This rear rotor bearing, came out of the rotor and i think it friction welded itself to the shaft.

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E-Shaft
Note: Bearing is stuck on the e-shaft pretty darn well!
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ROTOR HOUSING (This one was where the rotor bearing pulled out and stuck itself on the shaft. Other housing is actually good condition)

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Holy Chipping away!! Looks Re-useable!
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Yup.. Pretty bad!
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Also, Cracks on the plug hole, this is done!!
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Chatter Chatter Chatter Chatter!
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ROTORS:
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Available History: Carfax isn't the best but this gives a better idea.... this car has been through a lot

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Note: I bought it at 100,716 Miles. Carfax just hasn't updated when the report was run.

Last edited by xKp5609x; Sep 20, 2016 at 08:57 PM. Reason: Added Carfax History.
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Old Sep 20, 2016 | 10:53 AM
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Damn. Thanks for sharing.
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Old Sep 20, 2016 | 10:59 AM
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Yikes. It's unfortunate we don't know the oil type and change history. Need more autopsies like this, but with patient histories.
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Old Sep 20, 2016 | 11:03 AM
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I secretly can't wait for my engine to go. I got to tear down my last Mazda reman and this one was turbocharged from day one and now has right at 40,000 miles on it.
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Old Sep 20, 2016 | 02:16 PM
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Originally Posted by 9krpmrx8
I secretly can't wait for my engine to go. I got to tear down my last Mazda reman and this one was turbocharged from day one and now has right at 40,000 miles on it.
You know you can make that happen....right
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Old Sep 20, 2016 | 02:58 PM
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^I wish I could convince him to up the boost. Around 13-14psi
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Old Sep 20, 2016 | 03:08 PM
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Originally Posted by yomomspimp06
^I wish I could convince him to up the boost. Around 13-14psi
Maybe I will once boost season gets here
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Old Sep 20, 2016 | 08:52 PM
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Originally Posted by 9krpmrx8
I secretly can't wait for my engine to go. I got to tear down my last Mazda reman and this one was turbocharged from day one and now has right at 40,000 miles on it.
You're currently on your PR build correct? You probably still have a while before you have to worry about that.. Lets hope!
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Old Sep 20, 2016 | 08:56 PM
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Note: Just updated carfax, i mean it doesn't provide much in terms of OCI of maintenance details after the second owner but i thought it would provide insight into what the car's been through. The owners were on top of big issues like the engine, re-programming, tail lights, etc. Then when i got it, it was in TERRIBLE condition but being one of my dream cars, it was a plus that i got to "restore" her!
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Old Sep 21, 2016 | 09:49 AM
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Originally Posted by xKp5609x
You're currently on your PR build correct? You probably still have a while before you have to worry about that.. Lets hope!

Yeah, compression is still solid as of 6 months ago. Of course that can change from one day to the next. If I make it to 50,000 miles on it (40,000 now) I will be happy. This engine has been boosted since day one and dealt with some half assed tuning for the first 10,000.00 miles. But really any boosted Renesis making it to 50,000 miles is great.
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Old Sep 21, 2016 | 10:37 AM
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Scotland, CT is the town next to where my parents live, it's funny I never remember seeing a red 8 in the area.
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Old Oct 3, 2016 | 07:25 PM
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Does anyone know how the corner piece of the apex seal behaves once it passes over an area of the housing where chrome flaking is present? Can it catch on the tiny groove created by the chrome flaking and get stuck?
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Old Oct 4, 2016 | 11:16 AM
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Originally Posted by 9krpmrx8
I secretly can't wait for my engine to go.
Easy. Just don't change the oil for 8,000 miles, don't check oil level every other fill-up and never rev it above 5K. Oh yeah, and drive it hard a mere seconds after starting it up in the morning. In other words, be a typical owner. Then find your way to this forum and complain about the horrible reliability of the Renesis engine.

Last edited by New Yorker; Oct 4, 2016 at 11:20 AM.
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Old Oct 4, 2016 | 04:04 PM
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Originally Posted by New Yorker
Easy. Just don't change the oil for 8,000 miles, don't check oil level every other fill-up and never rev it above 5K. Oh yeah, and drive it hard a mere seconds after starting it up in the morning. In other words, be a typical owner. Then find your way to this forum and complain about the horrible reliability of the Renesis engine.


Or maybe I should just be like you and only drive it 2000 miles a year for the next ten years and then claim it's the most reliable engine ever.
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Old Oct 4, 2016 | 04:24 PM
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Originally Posted by 9krpmrx8
Or maybe I should just be like you and only drive it 2000 miles a year for the next ten years and then claim it's the most reliable engine ever.
We've been through this before, clearly you just don't get it. 38K trouble-free miles is 38K trouble-free miles, regardless of how long it takes. Though I have been told, by many, that it would be better for the engine if driven more frequently. Except... how do you top... zero problems??

Last edited by New Yorker; Oct 4, 2016 at 04:29 PM.
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Old Oct 4, 2016 | 04:59 PM
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Oh I get it, you think 38,000 miles over 10+ years without any issues is something special in terms of reliability. It's not.
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Old Oct 4, 2016 | 05:50 PM
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My point exactly! Thank you.
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