Help with 97 sti non turbo dosn't appear 2 b using any oil but after traveling 15 or 20 minutes at 90 or 100 kms stop 2 idle burning oil smell & a bit of smoke appears 2 b frm lower back of motor - not dropping oil frm motor - any feedback apprciated - jo-

for sure engine leak oil (what about 1/2 on the road)
and for sure if said leak , travels by wind or gravity, lands on the
exhaust PARTS, it will smoke and burn.
fix leak, stop burn.

You don't mention what that smell is reminiscent of?

You don't mention the colour of the "smoke" and you didn't say whether the engine is petrol or diesel?

You don't mention whether the road behaviour/performance is normal?

White smoke is almost always steam or in the case of a diesel it could be an unburned fuel mist, grey/black is excess fuel and blue or grey/blue is burning oil.

Some steam is fairly normal until the engine and exhaust system is hot but excessive amounts could be one symptom of head gasket trouble. If the engine is drinking coolant and sending it through the exhaust as steam it will sometimes smell spicy.

Burning oil smells a bit like burned eggs in the frying pan.

If the car hasn't ultra-low sulphur oil and fuel the catalytic converter will convert sulphur traces into hydrogen sulphide - the bad egg gas...

Black smoke is fuel.
Blue is oil.
White is coolant / water.

Fuel is caused by timing and cold start system and requires some discussion to clarify.

Oil burning only on start is caused by failing rings on your cylinders. Oil then enters the combustion chambers and burns when you start the engine. If it continues to burn when running in particular when you accelerate it will also indicate ring/cylinder failure. It can also be from a failing head gasket where oil travels from the lubrication system into the combustion chamber. Some of the anti smoke additives available at the auto supply store do help.

I doubt you are seeing white as you say is smells like exhaust. White is coolant in the combustion chamber or exhaust system.


Hope this helps you.

That sounds like the "Porportioning valve" is defective.
You may want to go to your local library and check out a Chilton's, or some other repair manual for the "how to" to fix yourself or take it to a tech you can trust.

use slightly thicker oil,it unfortunately may be burning oil,sometimes high oil cpnsumtion is due to engine wear,especially if its not leaking if it uses under 1 litre,between services thats ok but if its using 1.5 to 2 litres thats an issue

First off, how the Hell did they issue a DOT Cetificate, if the Emissions are known to be off the clock. Without causing stress, do you have, or can obtain the Emission Test Result Print Out from the Testing Station test Equipment. This is something they cannot refuse. DO NOT AUTHORISE ANY REPAIRS Come back TO ME with your story.
Regards,DT

It's very common for the turbo return line seal to leak. That is what I would check first, when it leaks, it will spray oil all over the turbo lines and the rear of the engine.

Bret
RepairPal.com

If you let the car idle when you stop driving it gives the car time to recirulate fresh oil through turbo bearing , since the turbo gets extremely hot from the exhaust side (and spins at very high speeds) you really should also run full synthetic oil on turbo cars to extend turbo life.regular motor oil tends to burn and carbon up in turbo bearing and causes premature turbo failure .

MASS AIRFLOW SENSOR THERE ABOUT £6O WHEN THEY PLAY UP THE CAR WONT IDLE PROPERLY AND POOR RUNNING/HESITATES BEFORE IT PICKS UP AGAIN, NOT SURE ON THE BLACK SMOKE THOUGH, GOOD LUCK .

i have an 05 sti. its the same motor as the 09. you definitley want to use a high quality full synthetic oil 5w-30. check the level often because it is normal for this car to burn a little oil do to the turbo. especially if you start making performance mods.