I am new here to the site so this is my first thread. First of all, I am asking for some help with my 1985 RX-7 that is having some motor issues. I do not know alot about rotary motors, so any explanation please keep simple.

THE PROBLEM: Last year, I was on the expressway and I was running the car pretty hard and then all of a sudden white smoke all over the place. I pulled over and found that it over heated. I replaced the antifreeze in the car, but now the car does not want to respond the same and its blowin white smoke from the tail pipes as well as it looks like the bottom of the exhaust manifolds.

Any help will be greatly appreciated in diagnosing the problem...not sure if this is a head gasket that went bad or the appex seals are shot.

Thanks!

 

Most likely an O ring is letting coolant get into the combustion chamber. What ever it is its going to need to come apart.

The rotary is very much a detail intensive rebuild. It is unforgiving if you think it can be thrown together. Start reading, buy a manual or two, start collecting accurate measuring devices(feeler guages, dial calipers etc). They are not hard to put back together, its all in the details.

Depending on the mileage, expect to replace a few parts like rotor housings or plates. You rptating assembly should be fine if the smoke is your only clue of illness.

 

Thanks for the help! I think it might just be easier to swap out another motor and go from there, not really into the rebuilding of motors to much.

 

Adding to this thread anyone know of a place that I can find a inexpensive 13b rotary to swap out on this car?

 

You should do some reading on the forum to see what is involved in putting a 13B in that chassis. Again, not really hard to do, just some mount issues and then how to get fuel into it (carb/manifold or injection). Then exhaust flange is different. Its a little like going from a small block chevy to a big block chevy, everything is close but not exact.

The easiest would be to find a 12A and R&R the engine in about 3hrs.