Blowing white smoke when the engine is cold.

My friends give me 1.6 hdi 307, 2007 model engine blows white smoke from the exhaust when it is cold and cuts it in the chisel and it has a smell in the chisel.
Meanwhile, the injectors received heavy maintenance
Egr original new changed

There are many topics in the forum.

My old 207 was similar, check that the nuts around the injector are tightened well, wash the engine of the vehicle and check again. If the processes are new, it continues for a while, the reason is that when the ignition is switched off, the diesel remains at the end of the injectors, the chamber beats without burning at the first start, it smells