I took a video of each rotor cranking with the lower spark plug out and
the front rotor has one distinct Pffft and the rear rotor has two...

I'm figuring my rear has a stuck or broken side seal (Probably stuck, motor
has been sitting for about a year)
and I'm guessing my front has a broken or stuck apex or two stuck or broken
side seals.

Can someone please confirm my diagnosis?

Front Rotor: http://www.youtube.com/watch?v=9C-x49TAOM8

Rear Rotor: http://www.youtube.com/watch?v=_nl5b4Ql5c8

Regards,
Orb

 

It sounds like you have the right thinking. You can double check with a compression tester though.

 

They both definitely sound blown. The front seems to only have compression on one face of the rotor, while the rear only on two faces of the rotor. Compression test should confirm.

 

I would if I had one... Little tight in the cash department...

 

No big, it wouldn't tell you much more than you already know anyway. You can try some ATF in there to break things loose if in fact a seal is stuck, but it's probably going to have to come apart.

 

harbor frieght has a pretty decent one on sale right now for $20. Well worth it I just bought one yesturday

 

Yea, I put about 1/2 a cup in it a little while ago (1/8th cup in each LIM port) and cranked it over about 20 times
and gonna let it sit over night and try things again in the morning.

It won't hurt the rubber to much sitting over night will it?

 

i assume you've read this?

http://www.aaroncake.net/RX-7/atftrick.htm

Also, mazda sells "zoom engine cleaner" or something along those lines that goes through carbon like water and doesnt harm the engine.

 

Let some ATF sit in it for a few hrs last night and then left oil and mmo in it over night and here's the result...

It starts, has 3 puffs on each rotor though the 3 non existent puffs are now there just a bit weaker then the good ones so hopefully they will get better with time.
It runs now though so thats a good thing!

http://www.youtube.com/watch?v=OzmjM9I9YmM

 

Wow you have great luck.

 

 

It started doing this after i drained the coolent from the main drain plug on the motor....
Water seal????

 

sounds like rear rotor has a dead side seal, front rotor has a dead apex.

can always try the ATF...but i'm going to vote for toast motor.

 

How do you figure?

You saw that it runs now, right?

 

Stuck seals

I use z00m z00m cleaner. works very good and its not expensive