this isn't RX-8 specific, but its rotary specific and its got entertaining pics. last night i decided it was past time to tear down the 12A that originally came in my ocean blue 85 RX-7 GS which i converted to a 13B car, powered by the 13B from a GSL-SE. this engine was locked up when i brought the car home. i tried atf for days and gave up and pulled the engine. i saw the engine sitting on the garage floor tonight and decided to tear it down just to see what the issue was. it looks as if an apex seal let loose on the rear rotor and when it broke apart, it let the apex seal spring fly out and lodge itself between the rear rotor and the iron. it came apart nicely with only minimal fighting. the engine had 142K on the clock and was heavy on the carbon buildup. the rotor bearings look nice but the housings have some flaking and wear. i don't know that i would even attempt to reuse the #1 rotor housing. its in fair shape imo. the rear housing is trashed due to not only the flaking but due to the apex seal shredding itself in the housing. here are some of the pics i took of the engine internals:

rear iron:



#2 rotor housing:









#1 rotor housing:





intermediate iron:

 

here are pics of the rotors:

#1 rotor:





#2 rotor:

 

here are a couple more pics from earlier in the evening during the teardown:

 

Hey thanks for the pics; I always like to see how it comes apart and how it really looks with the carbon buildup..

Cheers!

 

Damn, that housing is toasted.

Same thing for #2 rotor.

Oh hey, mind to show the Stationary Bearing pic ?

 

i'll be glad to post a pic of the stationary bearing once i remove it from the rear iron!

 

this one was heavy on the carbon buildup. its apparent that the oil was changed infrequently, low octane (87) gas was commonly used (which is what is reccomended), and the engine was abused during the few thousand miles it was driven.

 

Cool.

 

cool!! would u clean rotor #1 n sell it to me? not that im gonna reused on a car...

 

i have a rotor that is no good and is clean that i would sell to you. i need to spec the posted #1 rotor here and see if its useable.

 

holy carbon batman!

 

Mad carbon on the rotors ! whoa !

 

i will not reused it.... How much shipped to 27107?

 

Yeah, I would like to see the S Gear Pics too, same ones used in an RX-8 4 port.
There is one on the front too you know.0820-10-502B

How many miles had this engine done??..sorry my bad 142K... DOH!

But everything is/looks Toasted/oil burnt....

 

Epic.
How much power did the 12A actually make to the flyhweel?

 

the 12A made 101hp and 107lb/ft of torque in 85

 

i'll get pics of the stationary gears. both look to be in nice shape but are still in the irons. the engine was most definatly abused. on par with the rest of the car though. this is what became of the car: http://www.rx7club.com/showthread.php?t=822222

 

i took many of the parts to the machine shop last night and hot tanked them. the parts cleaned up nicely. i now havea rotor and housing display for my officer courtesy of the #2 rotor. i'll post up pics tonight after work of some of the clean stuff!

 

PICTURES ! or it didnt happen !!!

 

I like the last pic in your first post, it's the wear pattern of the rotor wear within the trochoidial shape that catches my eyes.

 

i'll get pics tonight if i can. i'm working 7a-7p and then i'm taking the kids out trick or treating. it should take less than 5 mins to grab some pics so you guys should see more of the clean parts tonight. i haven't had a chance to remove the stationary gears but once i do i'll post a pic.

 

cool pics

 

thanks!! i have the day off and i have the clean parts laid out in the garage. pics to come soon!

 

amazing! i'd love to see the cleaned up pics

 

Stationary bearrrrrinnnggssss !