Heads up for anyone with smoking, on secondary turbo activation 4.4 tdv8.
Car in question does NOT have the modified dual outlet secondary turbo drain but has been perfect for the 80000 miles or so of our ownership. About a month ago, while accelerating away from a junction, the car produced a smoke screen that Michael Knight would have been proud of. My initial thoughts were that our luck had run out and it was time for the drain mod. The symptoms were that the first acceleration of the day, above 2k rpm, would produce masses of dense smoke. Only seemed to be the first couple of enthusiastic accelerations then would be fine for the rest of the trip.
Upon doing more reading about the drain mod I had a look at topix with regard to the dual sequential turbo set up on the TDV8. I came across this line:-
" An air feed pipe, from the charge air pipe into the throttle assembly, supplies compressed air between the seals of the secondary
turbocharger compressor stage to prevent oil leaking into the compressor housing when the turbocharger is not running."
I had not seen anything about this in any of the discussions about this issue I had read, and I have read a lot!!! Anyway not hoping for much I checked this pipe on the car. What I found was a split about 10mm long at the back of the pipe. I cut off the damaged section and reattached the pipe to the throttle body. Since doing this over a week ago the smoke screen problem is completely solved!! Everything is back to normal and, despite trying to provoke the issue, the car has steadfastly refused to produce any smoke.
The pipe assembly I'm talking about is part no. LR033339, picture attached, it's the light grey pipe in the image connected to the throttle body.
Anyway it would be worth checking if these symptoms happen to you as it's a much easier fix than the drain mod. Not saying it is a solution for everyone but definitely worth a look.
![](https://www.fullfatrr.com/gallery/albums/userpics/22905/normal_1000001629.jpg) | Click image to enlarge |
|