you put your gasket on wrong and it didn't seal.
You just have to see where it is leaking. There are numberous gaskets and hoses it can be coming from. Have it preasurized and it will be easier to find.
the inlet manifold could Be leaking so check the gaskets or the injector seals
it sounds like your exhaust manifold gaskets are leaking or you half a hole in your Y pipe
Because it's leaking somewhere. Other than lines in the cooling system, head and intake manifold gaskets are a possibility.
The oil leak is coming from the valve cover gasket and leaking onto the exhaust manifold, the rubber valve cover gaskets get hard from the engine heat and start to leak, you will have to replace the rubber valve cover gaskets to stop the oil leak
it could be from your valve gaskets leaking oil. my car was smelling like that and my gasket seals were leaking, both front and back. after having them replaced i dont smell it anymore. KNOCK ON WOOD
Take a look at the oil dipstick, is it milky? Is there white smoke coming out the tail pipe? May be leaking internally. If your beretta has a v-6 odds are that your intake manifold gaskets are leaking these gaskets are plastic and must be replaced periodically your antifreeze is most likely leaking there and burning off immediately thus you'll see no leak.I recommend youy take the car to a shop for diagnosis...
camshaft position sensor gasket or head gasket both likely
Most of the time it is because of leaking valve cover gaskets that drip oil on the hot exhaust manifolds.This is common on many cars.Mark.
It's difficult to say, without seeing where under the hood it's coming from. You could have a bad exhaust manifold gasket, leaking exhaust. You could have valve cover gaskets leaking or seeping oil, which would drain onto the hot exhaust manifold, and burn off... If you can provide more information on where the smoke is coming from, there may be a better answer.
with out looking at the engine its hard to tell but i would say its coming from the rocker cover gasket if its topend only, rocker gaskets are very cheap and an easy diy job