Thread: HELP

The 3.6 TDV8 has 2 identical parallel turbos but the 3.0 TDV6 has sequential turbos, with the secondary being a smaller one to fill-in at higher revs and loads.
The non-LR 2.7 TDV6 fitted to Jags has 2 identical parallel turbos.

Originally Posted by haydent

In the manual they are called parallel.

3.0 TDV6 has sequential turbos,

my bad:


The 3.0L V6 diesel engine uses 2 turbochargers; a fixed vane type (secondary) and a variable vane (primary) type.
The fixed vane turbocharger is fitted to the RH (right-hand) cylinder bank and the variable vane turbocharger is fitted to the LH (left-hand) cylinder bank.

Both turbochargers are used in a parallel sequential turbocharging system which enables the engine to achieve quick throttle response at low engine speeds and efficient use of exhaust gas energy at high engine speeds.

The variable vane turbocharger has an ECM (engine control module) controlled electronic rotary actuator. The rotary actuator adjusts the turbine vanes to optimize the exhaust gas flow and velocity onto the turbine wheel to maintain the required boost pressure.

The parallel sequential turbocharging system comprises the two turbochargers and the ECM. The primary variable nozzle turbine operates through the entire engine speed range but is at its most efficient at engine speeds of up to 2800 rpm. At engine speeds above 2800 rpm under load, the fixed vane secondary turbine comes into operation, with both of the turbochargers now running in a parallel bi-turbo mode.

Hello friends
Here is news of my turbos
I disassembled the two turbos of the RRS this weekend and here is the result in imageIMG_4453.jpgIMG_4450.jpg
I could see that the variable geometry is difficult to move by hand but there is no movement in the turbines
I will put a youtube link
The secondary has an oil leak between the turbines, certainly due to the return hose


Regards

Has the secondary turbo drain been changed to the direct to sump version? Originally the drain went via the scavenger pump where the pickup is low on the side of the sump but the revised direct drain attaches part-way up the sump. The original drain causes a built-up of oil in the drain which then escapes through the seals to the inlet side. Your oil leak may be coming from the gasket because oil isn't draining to the sump.

Unfortunately, the drain is the old version.
the car was however revised at LR and they never saw fit to make the modification recommended since 2013
To believe that they do everything so that the damage occurs
I could read that it was necessary to pass to the SSD if the turbos are changed by new ones, do you know a few things about this subject?

I purchased then fitted the drain to my MY10 3.0 D4. It would be an easy task compared with removing the turbos.

I've never heard of the turbos having to be calibrated so there should be no reason to use SSD or other diagnostic tool if one is replaced.

Capture d’écran 2022-05-20 à 09.06.51.jpg

it may be only if change of the actuator

IMG_4457.jpgIMG_4456.jpgIMG_4454.jpgIMG_4455.jpg

Hi,
Here is news of my turbos.
The first photo is CHRA of the right turbo which had a leak
The three photos are the left turbo, the expert told me that the part was broken before disassembly but I doubt it.
Both turbos are restored, I'm waiting for the order from LR, part and reassembly next week
Question: How do I run the engine without it starting?
Regards