To replace the dual mass flywheel on superb 2.0tdi 4x4 engine code CFFB and 6spd DSG box (wetclutch), there are some precautions I need to consider. First, get the right tools for the job. You never know what you get in terms of availability to certain bolts and nuts. Next is to consider, are they easy to unscrew?
So, to me I have different tools to these jobs. Mostly I use Milwaukee battery tools, but also a lot of hand tools, since it is easy to brake bolts and nuts with too much power.
For rusted nuts I have a induction heater and that helps a lot. When everything else is a failure, a well loved grinder is the way to go. Both a big one or a small Dremel like one.
I started with loosening the axle bolts on both sides before raising the vehicle. Used 24mm 12-point socket and biggest Milwaukee M18 Impact wrench (1898NM) to get them loose.
Take off wheels using 17mm socket and undo all plastic under engine and wheel housing with Torx25 and torx 30
Take out both axles using a long XZN 10 (or no 8). I stick a screwdriver into the vented brake disc plate to stop rotating. This should be easy. I actuallu disassembled the right brake caliper, disc and disck protection back plate to get better access to the drive axle bolts. In GB that would be on the driver side, but in Norway thas is the passenger side.
Next is to disassemble the lower vertical stabilizer nut to free the joint from the knuckle I think it was a 16mm pipe and also disassemble end link on steering rod from the knuckle (21 mm pipe I guess). Use a press, not a hammer imho.
Last, unscrew 3 nuts, 16mm pipe, holding the lower control arm from the knuckle.
Dont forget the height adjustment device (green one) on the left side of the vehicle bolted to the inner side of the lower control arm. Use 10mm socket.
Now, disconnect the 10mm nut inside on the steering rack behind the gas pedal in you car. Lift up and disconnect. Do not touch the steering wheel after this!
Remove the 3 dogbone bolts, one is 18mm, the 2 front are 16mm. Remove dogbone.
Remove the 2 13mm bolts holding the exhaust to the subframe
Now the subframe is held by total of 3 bolts to your car on each side. One is located thorugh a hole in your subframe and the other 2 in the back of your subframe. You will find them bolted directly to your car chassis. There are other bolts as well, but they are not connected to your car chassis, but to the steering rack etc. I use subframe guiding pins to avoid needing a 4-wheel adjustment after the subframe is taken down. See picture.
Take out bolt by bolt replacing each one with a guiding pin. Also set a gearbox jack or MC jack under subframe to support it. Now when all 6 bolts are removed, the subframe will come down and out.
Remember to disconnect cables to the subframe assembly, especially the oil level sensor will easily break if you forget to disconnect. Just lower the subframe enought in order to use your hands to unscrew the 3 torx 30 bolts on the heat shield over the subframe electronics. And use a small pick to disconnect the cables. When all are loosened, lower subframe.
There, subframe down and ready to continue next step.
Here is a picture of the guiding pins in use.