Have audi tt, 02 reg, started billowing smoke from exhaust, had turbo replaced 1day later problem returned only worse

https://www.oilburners.net/threads/7-3-idi-turbo-blue-smoke.50939/

This may help you.

check for sure the batt and charging.that can cause lots off problem.
weak batt gifs weak spark charge chould be round 14.7 not 14.9
that toomuch also not good.check sparkplug wires and rotor,if needed,
to replace use original parts.check also pipes off the turbo.

General rules of thumb: Low speed engine on acceleration with smoke in the exhaust plume = worn piston rings High speed engine accelerating (spooled up turbo) with smoke = oil form turbo bearing and/or piston rings Engine on over run (coasting down, foot off the gas) with smoke = oil from valve guides. VW/Audi make good engines with tight tolerances so none of the above should apply at 62K miles; just make sure that the oil (the right oil) and oil filter are changed regularly.

From statement "But still white smoke bad when it warms up". Check valve clearence

02 Audi TT with a 1.8L turbo or none turbo engine, Audi recommends, timing belt replacement every 105,000 miles.You still got some time, hope this was very helpful.

Yep, it is possible to get turbo off without pulling engine. I had a TB break at 85000 miles and did the repair at home (2 bent exhaust valves, 1 intake valve). Getting the turbo disconnected from the exhaust manifold was the single toughest part of this repair. It is attached with 3 reduced head socket bolts (appear to made from stainless steel). Eventually had to drive out one of the bolts...

You have blown a turbo charge pipe somewhere, check all hoses...Once this happens the car will begin to run very rich, as evidenced by the black smoke. Do not continue to drive like this, as the raw unburned fuel in the exhaust will clog the catalysts and that can be very expensive.

YOU MAY HAVE BLOCKED OIL RETURN HOLES,REMOVE VALVE COVER AND CH# THE 2 F/R

hardly likely the exhaust job would cause that, but yes it sounds like you got a blown head gasket. badl lock stricks hmm! also preasure test cylinder head for leaks

whatch for a clogged crankcase ventilation system. internal crankcase presssure(excessive) will push oil out the turbo shaft seal. also you have a supply line for fresh oil to the turbo and a return line. if the return line gets carboned up and there is nowhere for the oil to go it will push out through the turbo shaft seal.