I h ave an 2013 1.6tdi octavia. The original clutch was starting to be an issua at 250 000km. There was huge judder when releasing clutch and getting the car to move.  I bought replacement parts from ebay  (ebay clutch kit) . It was supposed to be the correct sachs clutch kit with part number 3000 970 069. I verified it from various locations. 

 

After removing the original clutch and comparing the clutch cover to the new one there was a small difference. Attached images show the difference. I think that pin is part of the self adjusting mechanism. 

I think the original one was self adjusting and the new one istn. It is supposed to be according to sachs site so i think the ebay part is wrong.

 

Well i still installed the clutch. The judder is gone. The release bearing was totally worn out.

Gears work and i thought i made the replacement correctly. 

 

Then the biggest problem.

 

The clutch pedal is really hard to press. Everything works fine but it is just really hard to press compared to the original clutch. 

What is the possible causes ? other than wrong parts ?  im 99% sure that i got the installation right. 

 

Original clutch cover part number was  3082 001 693

and the one i got with the kit is  3082 001 938

Can't add anything hugely useful here, bare the obvious question about bleeding the master and slave cylinders on the clutch when you changed it?

I assume the clutch cylinder located at the clutch end was tested and good ro replaced too?

Didnt bleed yet but going to try it.. I just thought no need to bleed because i didnt touch the hydraulics. And i just thought if the system had air it would be soft and not working.. Atleast brakes work like that with air.. The pedal just goes to the floor if there is air. So the opposite that is going on in here 😕

The clutch is thicker than the one you replaced, which may have a bearing.

It may be that the clutch fingers on the old one were totally cream crackered and very soft and, therefore, the new one feels very stiff.