I've rebuilt 2VC now using PMSQ as an additive. The additive will keep the silicone stable.

 

Is that Polymethylsilsesquioxane? As in this stuff? http://www.formulatorsampleshop.com/FSS-SilDerm-SQ-p/fss30311.htm
And to what mix ratio? I haven't done mine yet partly because of this concern over silicon fluid stability.

 

I have two spares now and look forward to have them ovehauled. Stoked to see go forward, adding more knowhowA:


Regards!

 

Silderm is aimed at the cosmetic industry and I haven't been able to confirm the particle size or quality of that product. There is a patent on the use of polymethylsilsesquioxane in a VC and there might be infringement problems if we discuss too many details. See the first post for details of the anti wear agent I am using and how to purchase

 

Any more updates on this with the fluid stability and many miles have you done etc good/bad??

 

Not as yet. Having mixed results with the additive as the amount to add seems to be quite critical. Too much and there is not enough friction. I need more guinea pigs to try different concentrations. But plain silicone seems to work and no one knows how long that will last on its own yet.

 

Hi,
Now I have opened my VC, cleaned the plates and I saw some markings on each plate. Did you put all the plates back with the sign in the same place? I checked and if put the plates with the marks in the same place all the holes and stripes will be in the same place alse everyting will be random.

Thank you,
Sebastian

 

I always mix the plates in order and orientation

 

Am I missing something? After cleaning I put everything back to check it. It seems that the plates have 1cm free play between them, so the distance between plates can be bigger or smaller during function. I have checked your pictures and in post 26 you have everything put back and I saw that you have piece that is missing from my VC. Is the one in the red circle. Is an add-on from you?

I have made some pictures with all the parts. I am almost sure that the order is correct (at least this is the order they came out)

All the parts

Start assembly

As you can see in the last picture the distance between plate can vary. Is this right?

 

whack this in you will be ok.
http://www.ebay.co.uk/itm/CML-Pure-...FAST61-30K-/371154068212?pt=UK_ToysGames_RadioControlled_JN&hash=item566a81a2f4

 

YOU FIRST :*

 

I can't see any pictures. Where are they.
I don't add anything to the VC in terms of additional parts. There is a washer at the top and bottom of the plates if that is what you mean. The washer is held in place by the central shaft at each end. Are you sure it is not in the lid of the VC. It will be stuck in place with silicone and you just haven't noticed it. i have the correct grade silicone listed on eBay and it is not the link posted previously

 

Now you can see the pictures.
In the pictures you can see all the parts. It is strange..... in the lid I haven't seen any washer...

I have already ordered oil from you. I am expecting it. Thank you.

 

There should be a little ring like in your first picture top and bottom. Double check your lid, I am sure I can see the other one there. Use a screw driver to remove it. I do have a spare washer I could sell you if it is really not there

 

I think there it should be a thicker washer (aprox 1 centimeter) with some grooves in order to be fixed on the shaft. The washer in the first picture is too thin.
If I put a washer like that there the plates would move on the shaft on the free space seen in the last picture. A thin washer will not stop the plates moving on the shaft.
Am I right?

I have other broken VC which I will want to fix it, but for the moment it is not in my possession in order to open it an give it a better look.

 

You are right. There was another washer on the lid.
But my question is the same.

In the picture below is a gap after I close the lid. (the lid will be where the washer is) Where the plates can move. The plates should move in that gap? In your picture seems there is another part. (between plates and washer)

 

There is no other part. The gap is normal. If I took a picture of mine at the same angle you would see it is identical to yours. I have serviced over ten now and they all look exactly like yours with the same gap. Your VC looks good to go back together. Stop worrying, shove the silicone in and get the thing back on the road. Then pat yourself on the back after a job well done.

 

Thank you VC Guru!
I owe you beer. If by any chance you will want to visit Dracula's Castle please let me know. There are to many things to see around here.
P.S. I will not let you touch my dishwasher!

 

I sold the syncro to buy a t5 which turned out to be the worst thing I could possibly do. The t5 2.5tdi engine is made of paper and shortly after purchase destroyed itself. I have since gone back to a disco 2.

 

Thats the sort of story that keeps me in a T4. Sorry to hear it all the same.

 

Leave over night and the air bubbles will come out.

My filling technique now is to fill with 200ish gram and then put the plates in one at a time waiting for the silicone to rise above the plate before I put the next one in. I then top up at the end.

 

Job done! I am really pleased with this work. I cannot wait to fit the serviced VC on the car and check if it is working properly.

Now I have opened the second VC and surprise ... there are 2 plates with 1 bend "finger". Why are they bending? The oil smell very bad (not like the first one). Let's say ... a bent "finger" will not affect the VC performance but I had other strange finding. 2 plates with "fingers" did not had anymore the right edge on the inside, turning on the central shaft. It seems that those 2 plates ware turning with the other set of plates (somehow glued) . Why? Old oil? Really strange.

 

Yes that is what happens if you don't change the silicone in time. The silicone goes bad and the VC starts to lock up in places. This bends the fingers. The next phase is for heat and pressure to build before the VC goes pop and bursts the casing. Provided the plates are still flat you may be able to change the order refill and get some life out of it.

Useful if you could post some pictures

 

Below you can see 3 fingered plates.
1. is destroyed on the inside
2. has bent finger
3. is fint
4. there is no 4th disck in picture

I will not try to repair the second disc since I suppose it will not affect the performance
But the first one will need to be replaced if I will find one.


Below there are more pictures with bad and good discs. I think the bad disc was somehow glued/stuck with the other set of discs and rotating with them destroyed the inner side.

 

I see what you mean. Individual disks have stuck to each other and stripped the teeth off like you say. I do have some spare disks but they do have bent fingers. I will have alook tonight. How many do you need to replace

 

Hi,
I will need just 2 disks. I will try to find them here. If not I will let you know. Thank you.

Today I have finished the job -> retrofitting syncro sytem on the my 1.9 MTDI Multivan. I am pleased with the job and everything seems ok (diff block -> ok / revers 4x4 coupling -> ok / VC -> like new).

 

Hello Iannjenn
I took down my CV Without any problems.
The cleaning was the most disgusting work i've done!!
As Sebicizaurus,Ihave a with teeth internal broken.
Is it possible to get one disk of yours?and how do you want I pay this?

Marsien73

 

I have some spare disks but note they all have one or two bent fingers. They are flat so should work okay. You can have 1 for the cost of postage which will be a couple of pound. Send me a message with your email address and I will send you an invoice via paypal

 

OK my adres pierre.dumoulin@orange.fr

 

hi

is this youtube video any help

https://www.youtube.com/watch?v=OS-M3fQH3zc

 

Yes good find, sums up the process really well. The only difference is that I put the disks in slowly allowing the silicone to totally cover before putting the next in and I would do the final top up now with the lid off as the full amount of silicone will fit without the need for a grease gun.

The VC that was serviced in the vid was not very old judging by the consistancy of the old silicone and the good condition of the disks. The older they are, the harder they are to open.

 

Hello

I fixed the CV and try my T4 on a bad snow road.
It recovered his strengh and i could stop and start it in bad situation.A:
With the lock diff,we see rear wheels spitting snow!!!!
I put 290 gr of marmelade: D inside the CV maximun level of the carter.I didn't added after the closure.
To close the CV and put the screw,it was a little bit difficult.10 degrees were missing.: Eek:
It was resolved with a thin touch in the border,about 0.10 milimeters of the aluminium carter.It was distorted and more hight outside than inside.
I made the tool with an old brake disc of Land Rover.Râpe:
I also changed the back differential bearing,it's a beautiful méchanicT:
Thank Ianjenn to you help.

 

This is such a good thread!
I ordered my rehabbed vc from a good chap on ebay.
but if I had the time, I would have definitely followed the instructions in this thread

 

Just coming back to this thread AND back to my Syncro conversion after over a year away from it! I've been driving the T4 in FWD and now living in Iceland and would really like the Syncro ability now! ;-) I plan to rebuild the VC in the next few weeks. I see updates on anti-wear agent, and this wasn't apparent when I purchased the VC rebuild kit from you Alex. Have you any further updates on it?