1.6 td - should i feel any boost?

[RogerT]

Opened the LDA, junior hacksaw all round the edge of the flange. And here is the hole! Next to mend with superglue and a bit of bicycle inner tube.

[RogerT]

Honey I shrunk the photos!

[RogerT]

Slightly bigger...
This follows on from my thread "1.6td - what's this wee pipe on inlet manifold?" I discovered the pipe to the LDA wasn't even connected to the turbo, but to the end of a bolt on the waste gate. Still didn't work after putting it on that wee pipe on the inlet manifold of course, what with it having a leaky diaphragm. Dieselkontor.de sell new Lda's for €120, and also replacement diaphragms in a pack of 5. They helpfully advised how to open the LDA (cut round the flange, bolt it together when finished with M2 bolts), and my plan is to use a flexible cyanoacrylate (superglue) and some old bicycle inner tube to patch the hole, tho I need to check that whatever oily stuff it was that was in the LDA is not an effective solvent for the glue. Literature says that motor oil is ok.


Edited: changed title and added detail.

[freebornman]

Hi
It takes around 0.2 bar that's 3 psi to move thew actuator and 10 psi to fully move it harder than I can blow!
to test the actuator remove the pipe , pull arm full back (towards the rear of the van) quite stiff , put finger over the metal pipe connector to seal it, let go of the arm it should not move if it moves back then there is a leak in the diaphragm . This part is the LDA and controls the boost mixture Brickworks I think has them at a cost!

Evening all,
Some great threads and info on the forum, I have just carried out the above to my 1986 16td jx and as described, it fails the `finger over pipe connector` test.  Will be ordering one from Brickwerks.  
Was wondering if the faulty LDA would contribute to a blue smoke from the exhaust?  I am going to change the turbo oil return line as that has a slight drip of oil, I had the oil and filter changed to see if this was a cause but still blue smoke particularly under load when cold, although after a good 20 min run the blue smoke seemed to subside ?   Engine has always been a tad sluggish up hills-not that I am looking to break any hill climb records - and has always been good with oil consumption.   Any thoughts and possible solutions would be greatfully  received.  
Happy Camping 

[davidoft1]

There’s not really much in the way off an ooooo that’s boosting , but mine jx will do 100-120kmph

[RogerT]

Holy thread resurrection, Batman!

For what it’s worth, I gave up trying to repair my diaphragm and shelled out for a new LDA, and felt the improvement. No idea about your smoke... how much do you get, faint smoke or choking following motorists? All the time or under load?

[freebornman]

Smoke was pretty bad, I would say excessive. checked underneath and noticed that the oil return pipe had a slight kink in it,  I changed it over this morning and took for a run, the blue smoke has thus far  virtually dissappeared    I will be changing my LDA  as that is not working properly so, fingers crossed, I will be back to normal running soon