Exhaust smoke and non starting

Hi Beau,

You should get back to the mechanic to get it checked. Seems work was not carried out perfectly as engines are not supposed to leak engine oil after 2,000 km.

The emission of black smoke and difficult starting could be due to a fault with some sensors and a diagnostic scan should be able to retrieve the trouble codes if the check engine light is illuminating (sometimes it does not illuminate but trouble codes are stored in the engine computer).

Black smoke is improper combustion, meaning fuel is not completely burnt and partially burnt fuel is being pushed out of the exhaust. Blue smoke is engine oil being heated up, could be oil getting to the cylinders or exhaust port via valve seals. It could also be residual oil within the exhaust system and this would clear up after prolonged driving.

Overfilling the engine oil is not a good thing. When oil are new, it sometimes is quite difficult to see on the dipstick. After pulling up the dipstick, keep end pointed downwards to prevent oil from flowing upwards of the dipstick for a more accurate reading. Slowly turn the dipstick round to check if the oil level mark is visible. You might need the help of reflecting light to assist.
.

I had mistaken your vehicle for a petrol engine so the blue smoke has a different explanation.

When poor combustions occurs with excessive smoke being dumped out, it would turn to bluish when the combustion suddenly improves and the amount of unburnt fuel ratio changes.

Not only the diesel fuel pump, the injectors are prone to fuel too, especially when mileage is high. These needs to be tested and done by specialists, not the normal repair shop. I would suggest getting them checked.

Is the check engine light showing and have you checked for trouble codes? A bad fuel rail pressure sensor or a fault with fuel pressure can cause this symptom as well.