Polo 9n3 GTi clutch issues...

[Keshan_G]

Hi guys,

I need some help,

I installed a motor in my car, after the test drive I found that the clutch would slip when in boost.
So we dropped the box, skimmed the flywheel and changed the clutch (smf set up).

The problem was still the same, the clutch would slip when coming into boost, the clutch pedal got rock hard and when I applied pressure to it, the master cylinder popped.

I have changed the master cylinder, changed the slave cylinder and changed the release fork but the problem still remains..

Any idea what could be causing this?

Thank you