Could someone give me some directions. I had a leak in my rx7 from what I believed to be one of the hoses that runs in to the engine oil cooler about a year ago. I shuit the car down, and let it sit for about 6 mos before I tried to start it again.. When I did, I filled it with oil, and tried to start it, it turned over slowly at first, but the battery didnt have enough juice to start the engine. So I went out and bought a new battery, put that in, and when I went to turn it over, the engien tuirned over, then suddenly clunked.. I would try to turn it over aghain, and it sounded like it turned slightly, but then clunk again...The of course the start began to smoke. any ideas what this is, and how I can go about checking/undoing the carbon lock, and how to do it.. ANy adice would be appreciated...

 

Unfortunately, if it is carbon lock, the only way to fix it is to remove the engine and rebuild it.

 

Steps to correct carbonlock:

1) call and order a rebuilt engine
2) remove current engine
3) install rebuilt engine
4) drive car consistently and store with oil/atf in chambers if not being driven consistently, rotating the engine at least weekly.

 

Try a good carbon cleaner and think of a good way to get it into the engine on the apex seals. Let it sit for a while and then try to manualy trun the flywheel/engine in hopes of being gental on the housings. That may be hard and you might have to use the starter. It sounds like the apex seals are stuck in a way that it causes loss of compression (crabon lock I think, can't remember). This can be fixed if you can unstick the spex seals, just becareful not to damage your housings cause that will cause a rebuild. My car was like this 20,000 miles ago and when I unlocked the seals it ran great. I even had a compression test done and they were some of the higher numbers that the rotary shop has seen. I forget the numbers right now and I will have to look them up on my print out. The car still runs to redline and past every day. Carbon seized also is not good and that is when the rotors apex seals are wedged stuck on the housing (i think, if I have the two backwards chime in). You have to be very carful here becuse you could break the apex seals or damage you housing really quick. This is fixable too. Use the same methode as before (carbon cleaner in the engine) and try to rotate the rotars backwards just a little to free them from the housing wall. This often is a result of a carbon locked engine that had been cranked over in hopes of starting it and the seals wedged them sevles on the housing walls.
Good Luck, you may not need a rebuild.