Hi,
Just thought I would share my experience with a window regulator replacement on a 2007 Octavia 2. This is the left rear regulator.
I used a bodywork dent puller suction pad and a ratchet strap (strap not really needed as the suction cup rests against the window rubber) to hold the window up while I replaced the regulator.
The plastic window holder on the regulator had broken, along with the cable. I bought a 2nd hand regulator with the motor from an auction site for £16 .
I didn't fancy re-fitting the regulator to the door with rivets as I don't have lazy tongs (large hand riveter), so I decided to buy a set of Aluminium Rivnuts with steel thread inserts from an auction site for £6 for a 100 mixed set (25 each M4, M5, M6 & M8).
I bought aluminium Rivnuts because research showed that fitting by hand works best with Aluminium Rivnuts, without the need for special tools.
I used a tube or cone drill (2nd from the right), from Aldi for £4.99 for the set.
I opened the holes in the door frame to 9mm, which is the required size for an M6 Rivnut.
This type of cutter is much better than a standard HSS twist drill when drilling sheet materials as a tube drill doesn't "grab" as breaks through the material like a twist drill can, plus, a twist drill can leave a slightly "out of round" hole, whereas a tube drill makes a perfectly round hole.
Once the hole is drilled, remove the burr from the front and rear of the hole, using a counter sink bit (included in the set I bought).
Now insert the RIvnut, with an M6 bolt, an M6 nut and two washers. Make sure the bolt is screwed in flush with the end of the Rivnut, to ensure and even spread of load on the thread as you set the Rivnut in place.
Using a socket drive, hold the bolt (and the Rivnut) square to the hole in the panel, and using a ratchet spanner, tighten nut onto the RIvnut. The Rivnut may spin at first, but keep going and eventually it will bite on the rear of the panel. Then it will start to deform as it is drawn towards the panel. When the spanner starts to get tight, slow down, otherwise the Rivnut thread can be stripped. Once spanner is tight (don't go mad), slacken the nut, then remove the bolt from the Rivnut.
The use of Rivnuts made it possible to remove the regulator unit for test purposes, which would not have been possible if rivets had been used.
To get the glass to sit in the plastic holder on the regulator unit, remove the motor from the regulator (3x Torx T30) then move the plastic glass holder on the regulator up to the top of the movement, MAKE SURE YOU DON'T LET THE PLASTIC GLASS HOLDER GO OFF THE END OF THE REGULATOR TRACK, AS THERE IS NO END STOP!!!!
Remove the rubber grommet, which then allows you to see the regulator track and the alignment hole on the plastic glass carrier (can only seen when the glass is lowered).
With the glass slightly lowered (about 50mm opening) offer the regulator into place, while locating the glass in the plastic carrier. Now move the regulator into place and locate the metal dowels (on the rear of the regulator) into the locating holes in the door frame. Now fit the M6x25mm screws to hold the regulator in place.
Once all screws are refitted, lower the glass using a pair of needle nose pliers to drive the regulator gear, until the hole in the glass is visible through the access hole (access hole in panel is approximately 40mm diameter). You can now push the larger plastic dowel into the glass, through the plastic glass retaining bracket (it should "Click" into place in the glass). Now gently push the small dowel into the larger dowel, which causes the larger dowel to expand slightly. Re-fit the rubber grommet.
Check that the window can go up and down by turning the regulator gear with the needle nose pliers (carefully, but don't put anything in the splines of the gear, as this is what the motor drives). When you are happy with the operation, re-fit the motor with 3 screws. Re-connect the multi way plug to the rear of the motor.
When you try the window, it will not do "one-shot" function until the window has been lowered fully (and is held there to mark the end of travel position) and the same for the upper movement. Once you have performed the upper and lower end of travel operations, the "one shot" function will work.
Hope this helps.
Russ