Tore apart a dead motor today...
 

I have had this thing for a few months laying around my shop taunting me to tear it apart. With help from my bro and friends today we cracked her open and found out why she blew. Sadly she was plagued with problems. It toasted every bearing, was missing a oil control Oring completly, had 2 cracked oil control ring casings, fuzed the rear bearings side seals into the rotor, ruined the plates, destroyed the eshaft, and was completly missing a side seal...
I will give props to the builder, it ran for some time before it blew. :-\ I am replacing the bad side seals, springs, corner seals, apex seal springs, oil control rings, soft seals, bad eshaft, 1 rotor, all bearings, and irons as needed. Should end up being a medium street port 13bt when I am done. I did this for my friends and it FLYS, so I cant wait :).

All the parts laid out, labled, and baggied.
http://www.supload.com/thumbs/default/teardown1.JPG

Apex seals, corner seals, springs, side seals.
http://www.supload.com/thumbs/default/teardown2.JPG

The burnt mid plate.
http://www.supload.com/thumbs/default/teardown3.JPG

Better view.
http://www.supload.com/thumbs/default/teardown4.JPG

The burnt rear plate.
http://www.supload.com/thumbs/default/teardown5.JPG

The side seal was just non existant, looked forgotten? weird? Looks like the compresson just slipped by :-\.

http://www.supload.com/thumbs/default/teardown6.JPG

Heres a pic of the dead rotor. The side seals are friction welded into it.
http://www.supload.com/thumbs/default/teardown7.JPG

Dead eshaft.
http://www.supload.com/thumbs/default/teardown8.JPG

Housings looked good.
http://www.supload.com/thumbs/default/tearndown9.JPG

My 20b workbench. :)
http://www.supload.com/thumbs/default/tearndown10.JPG

Nice pics. Love that side seal pic! lol, you can completley tell that the combustion gases were just going right through the side there, kinda like when you find a flange with an exhaust leak. You know exactly where it was leaking due to carbon buildup.

Wild! Thanks for teh pictures...how does somebody just forget the side seal. Wow!

All that blow by must have been hard on the oil control rings.

James

Spyder, didn't that just happen recently? Like, wasn't that the motor from your Grey '87 TII? ;) And I think you should update your sig for your mods and miles, your car has ~6k+ miles on it now, before you unhooked the speedo ;)

damn sigma? lake oswego i havent seen that place for years,now that i live in vegas,hows the weather rainy?

That cable unhooked itself after drifting :).
Na this was a beater motor matt helped build. Had some irons I practiced my monster street port for my motor on in it. Im chucking this one upto the front thermo pelet failure, starving the engine of oil. Sucks, but I can rebuild it by tuesday.

Since now I need a new motor for my car.... :rolleyes:

Its actually been around 90F out for the past week or maybe more. Time slips my mind, lol. Right now (4:45pm) its 97F. Vegas has awsome weather as well, just all year round. How does your rotary work in that type of temp conditions during the summer (110+)?