I have recently had my 2.4tdci remaped by bas and it is brilliant. I then installed a performance intercooler and silicon pipes. Not shortly after I now get a squealing sound on acceleration but only last for a few seconds in gears 1 2 3. If im steady away in 5th or 6th an then gradually accelerate then it may squeal for a few seconds. I haven't plugged my interface in yet? What sort of sound would the fan viscous coupling make if I damaged it whilst installing my intercooler. What else should I look for?