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12a rebuild thoughts

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Old Oct 23, 2019 | 07:02 PM
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GFRENCH's Avatar
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From: miramichi nb canada
12a rebuild thoughts

Guys while I'm doing a 351w install in my sa22 I still have the the stock 12a
I am thinking to look at rebuilding the engine.
Is it a senseable option to build this with the high cost it takes for parts on a rotary
Thanks for your thoughts
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Old Oct 24, 2019 | 10:06 AM
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From: https://www2.mazda.com/en/100th/
the 12A is the easiest engine in the world to rebuild, and its super cheap too.
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Old Oct 26, 2019 | 10:23 AM
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From: miramichi nb canada
thanks
i have not taken it apart yet but what it was when in the car only rotor had compression so i have no idea why but apex seals maybe the cause
i see on racing beat a rebuild kit but $1500 cdn for o rings and apex seals seems out right insane.
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Old Oct 26, 2019 | 10:51 AM
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From: https://www2.mazda.com/en/100th/
Originally Posted by GFRENCH
thanks
i have not taken it apart yet but what it was when in the car only rotor had compression so i have no idea why but apex seals maybe the cause
i see on racing beat a rebuild kit but $1500 cdn for o rings and apex seals seems out right insane.
the RB kit is all of the seals (apex, corner and side) and all the springs and gaskets. you might want to look in the exhaust ports, if it did blow an apex seal, it will probably need a housing, and those are not available new
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Old Mar 19, 2021 | 02:58 PM
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From: Las Vegas

Hay still new to forums...but I have rebuilt my 12a with just youtube, forums and the manual. (Oem stock build for daily drive) Though the videos probably would made it better

This was a neat tip I used to get my side seals and compression real tight.

I probably have about 3000 miles on the engine so far...and starts up are easy breezy..idles consistent.

Though there always a little voice in the back of my head that's never sure.

I live in the las vegas hot summer desert (avg temp 90/100. Right now temps are 70 avg. So ill see how it handles the real hot

Anyways clearancing my side seal took the most time...everything else just fell gently right into place

Also i used some water jacket heat guards that atkins sells, if you want to use them

https://www.atkinsrotary.com/store/6...66-23-025.html


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