Smoke coming from turbo area. FD
 

Hello everyone i recently bought a 1993 Rx-7 my first one actually but im having a slight issue which i cant pin point and i was hoping somebody with more experience and knowledge can give me a hand
my new FD smoke from the turbo area but not all the time. It happens here and there when i take out for a spin and bring it back to the garage it does not smoke any more i was doing some tranny work so i took advantage and checked one of the turbos the one near the tranny and it seemed fine(((( car is stock with 3inch exhaust inch down pipe.))) i saw some engine oil in top of the exhaust manifold close to the turbo closest to the chassis any ideas tips. Thanks in advance.

What does the smoke smell like? If it doesn't smell like oil, then it could be coolant leaking from a bad turbo coolant hose. There was a recall around 1994 that replaced those hoses because coolant leaking on the hot turbos could cause a fire.

There is an o-ring that creates the seal between the y-pipe and the small pipe that connects the secondary turbo compressor to the y-pipe. The o-ring can get old and fail allowing oil to drip onto the exhaust. The oil gets into those intake pipes from the crank case ventilation system. There is a chance this could be your issue.

Look for any rubber down there that could have failed and allowed oil mist from the turbos (or crankcase ventilation) to get on the hot side of the turbos.