Afew days ago my '99 mk1 punto started judding alot, more so at low revs and it was pretty constant. I also noticed the heater would no longer blow out hot air either. I done some reading online, tried bleeding the radiator a couple of times but it doesnt seem to have helped, maybe i did it wrong? The overheating light comes on on the dash, which it has never done in the year ive owned it, and also i havnt noticed the fan kicking in, so could it be a thermostat problem? but this wouldnt explain the juddering, right? anyway any help would be much appreciated! thanks