If the seals in the turbo are bad on either side it would cause smoking. A sure way to tell is to inspect the turbo for sings of leakage into either the compressor (intake) or turbine (exhaust) sides of the turbo. EXCESSIVE shaft play can is also a tell-tale sign.
Need to know why this is necessary.
Loss of power, smoke, knocking noise, popping noise, backfiring through carb, or out tailpipe. Any, or, all of these.
The two unmistakable symptoms are white smoke coming out of the tailpipe and/or consistent loss of coolant, sometimes rather rapidly.
One or all of these conditions could exist, white smoke from tailpipe and/or water drops coming from tailpipe, oily film on top of water at filler in radiator, milky look to oil on dipstick. The car may also run poorly depending on the severity of the leak.
check engine light will be on. visible smoke out tailpipe especially under heavy throttle. use OBD2 to read code, the car will know if its bad
Engine overheating, white smoke from the tailpipe, coolant in the oil, air bubbling from radiator with cap off engine cold and running. A compression test will verify if indeed the gasket is blown.
Loss of power on acceleration. Mysteriously "disappearing" coolant. White smoke out of the tailpipe. Those are three things that should make you wonder about the health of your head gasket, and I'm sure there must be others, too.
where does the oil line connect to on the other end ? sounds to me like you need new turbo
Look on the exhaust system for the turbo unit.
White smoke from tailpipe when engine is at normal operating temperature? Oil mixing with coolant? Coolant mixing with oil? Run engine to normal operating temperature remove dipstick and let a drop fall on hot part of engine - oil will smoke coolant will "sizzle" Misfire at 2 adjacient cylinders?
if you don't know this, you shouldn't drive an rx7...look at the engine...do you see a turbo???
It is quiet obvious when you have a turbo because when you accelerate you hear a whistling sound. The turbo noise is unmistakable.