Exhaust Smoke after Timing Belt Replacement

1998 Audi A6 Quattro. Had a cam cover oil leak that damaged the timing belt. Replaced belt under an extended warranty. Now the car blows lots of visible smoke out both exhaust pipes right after starting the car. Smoke
pretty well disappears after about 30 seconds, but not completely.
Looks/smells like oil smoke. If I shut the engine down, and immediately restart, the smoke comes back for anothe 30-60 seconds.
What could be causing this? Was something not done properly when the car was being repaired?
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Just a guess but if there is too much pressure in the crankcase that could have caused the original oil leaking on the timing belt. Now that that leak is fixed that excess pressurized oil fumes go somewhere else, which might be into the intake. And there it may condense back into a little oil that gets quickly consumed by the engine upon startup. Bottom Line = Too much blowby maybe???
Just a theory! :-) later, dave Reminder........ Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you are a mile away from them, and you have their shoes. Frieda Norris
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Try replacing the pcv if there is too much blowby.

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Did you double-check something this simple?
It might be the case that your oil was replaced at the same time as the belt, and they might have overfilled the oil pan. Did you check the oil level? Sometimes the plastic cap on the metal oil dip melts and because the probe will not fit deep enough it gives you a wrong reading, i.e., calls for more oil when in fact there is an excesss of it.

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In any case, I'm afraid you can say goodbye to your cat converter.

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Turn out it was the crankcase hose that was the culprit. Yhis is the hose the travels around three sides of the engine just under the removan\ble shield on top. It was split, and created a vacuum that pulled oil into 2 of the cylinders, causing the smoke, and also causing a repeated misfire.
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thanks for posting the update! I know you are glad all is alright again and you still have all of your arms and legs. lol

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