Mazda: fc3s wont start, apex seals, coolant levels

Question
i have a 87 rx7 turbo 2 generation and i over heated and it died so i don't know what should i do because i cant get the car started it has been 6 month I'm looking to get it fix so please tell me what part should i change if that apex seals or the cooling seals

Answer
They don't react well to overheating.  If it shut itself down that is a bad thing, if you caught it you may be in luck still.  The most common failures are side seal and apex seal in overheats.

Be sure the oil and coolant levels are correct first.

When you spin the motor over does it rotate freely meaning no compression.  If so you will need to remove the spark plugs and inject 10cc's of ATF, (transmission fluid) into each plug port (good time to clean the plugs).  Replace the spark plugs and then crank the engine.  A noticeable increase in compression will result if the APEX seals have any chance of expanding.  Stay on the starter if it sounds like the compression is returning, if not stop.  remove the plugs again and inject 5cc's more of ATF in each plug port then replace the plugs and try again.  The light weight ATF forms a temporary compression seal on the APEx seals and conditions them forcing them to swell.  The ATF will burn readily (it will pass thick white smoke) once (if) it fires up so warn the neighbors.

If it does try to fire up stay on the stater until it can run on it's own, get the RPM's up to 3500  and try to fluctuate the engine speed in this area until the exhaust begins to clear up.  Be sure it comes up to operating temperature before shutting it down.  I would advise driving it around before shutting it down so the engine has a chance to get a load put on it.  

Chances are if it it will not create compression and fire up after cooling off then you did permanent damage to the APEx seals and and overhaul is the only way out.  Same applies if it passes blue smoke, blue smoke being oil means side seal failure.

Hope it helps.

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