hi guys need some help, right so here's the deal got a mk1 focus 1.8 tdci sport and past while thers been awfull squeeking coming from the aux belt so changed the tensioner- got better then changed the extension pulley for the alternator got a bit better aswell but its still there although not as bad so almost 100% sure the last squeek is coming from the air con pump pulley as i can hear it coming from there and there is also a slight bit of movement in it also when i spray some lubricant into the centre of one of the wee holes it goes away for a few seconds! so my question is will i need to replace the whole compressor pump (cant find just the pulley)and if so will it need to be done by a garage as it will be under pressure?