After replacing the pistons and the head it blows a lot of smoke out the exhaust

Good afternoon,

The simple answer is no.

The oil is most likely coming from the piston rings.

When you replaced the pistons, did you check the taper and out of round in each cylinder?

Did you check the ring end gap before installing on the pistons?

Roy

2. Disconnect the engine wiring harness electrical connector from the high pressure fuel pump.
3. Remove the low pressure feed pipe. Refer to Fuel Feed Pipe Replacement (LAF) (See: Fuel Supply Line > Removal and Replacement > Fuel Feed Pipe Replacement).
4. Remove the high pressure pipe. Refer to Fuel Feed Intermediate Pipe Replacement (See: Fuel Supply Line > Removal and Replacement > Fuel Feed Intermediate Pipe Replacement). Discard this pipe.
5. Remove and discard the high pressure fuel pump bolts (1).
6. Remove the high pressure fuel pump (2).
7. Remove and discard the high pressure fuel pump O-ring (3).
8. Remove and discard the high pressure fuel pump gasket (4).
9. Remove the high pressure fuel pump roller lifter (5).

I would remove the high pressure pump and inspect it. See if there is any oil in the lines to the injector rail.

Roy