tore down another 12A
10-29-2009, 07:06 AM
#1
RX-Heaven
Thread Starter
iTrader: (6)
tore down another 12A
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:
rear iron:
#2 rotor housing:
#1 rotor housing:
intermediate iron:
10-29-2009, 09:16 AM
#7
RX-Heaven
Thread Starter
iTrader: (6)
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.
10-30-2009, 02:15 AM
#14
Super Moderator
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....
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....
Last edited by ASH8; 10-30-2009 at 02:18 AM.
10-30-2009, 04:59 AM
#17
RX-Heaven
Thread Starter
iTrader: (6)
10-30-2009, 05:01 AM
#18
RX-Heaven
Thread Starter
iTrader: (6)
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!
10-31-2009, 04:56 AM
#21
RX-Heaven
Thread Starter
iTrader: (6)
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.
