Sample smokes 1min. according to cold breed

Hello, would be able to use some good tips again, my sample BJ1995, 16v, smokes after the start, so `ne minute, smells so funny, then everything is normal again. If the engine is warm, nothing actually goes wrong. Must say that this only occurred for the first time after a completewechesl of timing belts and water pump, I had not seen it before. Would it be interesting for me to know what this is all about?