What is the cause of this strange engine noise and white smoke from the engine?

Question

My car has a problem

• the engine whistles (Hard to better describe it)
• white smoke comes out of the engine beneath the fuel filter
• Two different mechanics could not understand what's happening

I have a 2005 European Volvo V50 2.0D Diesel (160.000Km). Last evening I saw white smoke coming out from the engine and heard a strange sound coming from it. When the car was turned off I smelled burnt plastic. Later when I turned the engine on again I saw white smoke again leaving the engine and a strange new sound when I hit the gas pedal

Here I have some videos of the engine and car starting

https://photos.google.com/share/AF1QipP-OZOsR8MPGMiRkL6YFL-1capYJJ57UFFfrze0EKbP7Zahs4oC24AQx-5kOkUfwA?key=eW5PT3hKdXB2RHg5UjFhdUt0SzNKajBEaGV3Q3l3

Answer 1

I couldn't watch the video, but usually you can go by these guidelines:

• if it's white, it's coolant
• if it's blueish, it's oil
• if it's grey, it combustion

but the smell plays a big role.

I'm not sure why the brake fluid answer was down voted because, on some cars, it would be a possibility.

There are a few tests to do:

• is it only at startup? then puddle from a leak may be settling and then burning off at startup.

• does it get worse when you rev the engine? then look for a gasket / seal leak.

• open the radiator when the engine is cold, start the car, rev the engine; does the coolant bubble? if so, you have a leak between the coolant and the combustion chambers.

• open the dipstick, put a piece of paper on top of the tube, rev the engine; it should move a bit, as blow-by is natural; if it flys out, there you have a leak between the oil and the combustion chambers.

by doing these tests, you can slowly narrow it down.

Answer 2

Eventually I found out the problem! I had a oil leak onto the alternator! A new alternator and finding the leak solved the problem! Thanks to everyone for their answers

Answer 3

Brake fluid burns white if the diaphram in the booster chamber ruptures. Do you get more white smoke when you pump the brakes? Because the booster chamber is connected to the intake, a leak here will suck fluid into the engine.

Maybe just check brake fluid level.