Apparently, I had the mechatronic sealed in a professional gearbox repair shop almost 10months ago.. Then I realised that it didn't stop oil from leaking. So, few months ago I came across a mechanic who seems to be an expert in DSG gear. I showed him the car and he suggested resealling will cure it as the oil is not leaking from the breather. Well, once he took the mechatrone out we found out the previous guy used silicone to seal.. So this guy used proper rubber to seal and advised me that mechatrone sealling by the silicone wasn't good idea.. It has to be proper sealling rubber. Anyway, recently during seevice i saw a lot of oil leaking from all over the gear box. 

Could someone advise me, how can i fix it once and for good. 

Did anyone go through similar issue? Car is Octavia 2017 1.4tsi. 

N. B: There is no fault code or any problem with the gearbox. Mileage is 137k.

In all honesty its hard to really say, but it does look like fresh transmission fluid.  If that's the case, then the first and the second guy has mislead you.  It needs to be properly fixed.  If it has been properly fixed, some brake fluid sprayed on to get off all the old leaking residue would have lifted off the leaking fluid.

 

My concern is that the pressure needed for the mechatronic system to operated properly will be reducing and ultimately you will loose transmission if you continue to loose DSG gearbox oil.

1 hour ago, varaderoguy said:

In all honesty its hard to really say, but it does look like fresh transmission fluid.  If that's the case, then the first and the second guy has mislead you.  It needs to be properly fixed.  If it has been properly fixed, some brake fluid sprayed on to get off all the old leaking residue would have lifted off the leaking fluid.

 

My concern is that the pressure needed for the mechatronic system to operated properly will be reducing and ultimately you will loose transmission if you continue to loose DSG gearbox oil.

I'd recommend using a proper engine or brake cleaner rather than brake fluid to clean off leaked fluid. Brake fluid will leave its own residue behind. 

19 hours ago, varaderoguy said:

In all honesty its hard to really say, but it does look like fresh transmission fluid.  If that's the case, then the first and the second guy has mislead you.  It needs to be properly fixed.  If it has been properly fixed, some brake fluid sprayed on to get off all the old leaking residue would have lifted off the leaking fluid.

 

My concern is that the pressure needed for the mechatronic system to operated properly will be reducing and ultimately you will loose transmission if you continue to loose DSG gearbox oil.

The second mechanic has replaced dq200 with new gasket. What else could be done to fix the problem? There is no damage in the mechatrone. 

Is there is a specified torque for the bolts? If so, perhaps they weren't correctly tightened.

1 hour ago, Gammyleg said:

Is there is a specified torque for the bolts? If so, perhaps they weren't correctly tightened.

I'll get it checked out soon. But mechanic shouldn't be doing that silly mistake especially when it was leaking already. Anything else that anybody can think of? Do I need to consider replacing mechatrone to fix the problem? 

On 26/11/2024 at 17:06, Warrior193 said:

I'd recommend using a proper engine or brake cleaner rather than brake fluid to clean off leaked fluid. Brake fluid will leave its own residue behind. 

Fair point. That should have been brake cleaner.

18 hours ago, automass said:

I'll get it checked out soon. But mechanic shouldn't be doing that silly mistake especially when it was leaking already. Anything else that anybody can think of? Do I need to consider replacing mechatrone to fix the problem? 

Were either of the mechanics DSG specialists?

It certainly seems like the first guy was not entirely competent, and the second guy may not have solved the problem.

But until you clean the area properly and monitor it for further leaking, you won't know for sure.

If nothing else, you might like to leave a review of the first mechanic somewhere, noting his simian ancestry and questionable pedigree.

1st one is gear specialist shop... 

I had the car taken to the 2nd mechanic. After inspecting the car, he said that it was gearbox oil overflowing.. There is no leaking from the gasket he fixed. He said that he might have topped up with too much fluid while he did replace the gasket. 

Well, he gave it a good clean with spray and asked me to keep an eye.. If still there is oil leaking then he will do further investigation.

 

Overflow?

 

Now I am following with interest. AFAIK the transimission is closed system without any relief valves or other ways to overflow out from the system. Does someone know better?

 

Btw, does the oil smell like transimission oil or if not familiar, does it smell at all? I ask bcs it cud be something else leaking above the transimission, ie. leak from boost pipe looks clear oil because it is condensed PCV oil. Has such possibility been considered?

 

Edit. Nvm, apparently there is a breather. Good to know.

Edited 9 December, 20241 yr by RattleWagon
Google is a friend

21 hours ago, automass said:

After inspecting the car, he said that it was gearbox oil overflowing

So in that case, somebody didn't do the procedure of removing the outer fill plug when the DSG gearbox is between 36-42C - because if they had done, it would have probably dropped out a load of excess fluid.  A DQ250 box uses 5.2L of DSG transmission fluid and a DQ381 box uses 6L of DSG transmission fluid.  I wonder if too much fluid was put into a DQ250 box, because they misread the fluid levels for a DQ381 box.

The OP,s DQ200 has 2 oils, in the MCU and in the gearbox. 

 

http://briskoda.net/forums/topic/470446-precautionary-dq200-oil-change

 

Edited 9 December, 20241 yr by Ootohere