ive started to focus my hearing on my engine on my 95 wrx ,the past few days and there is one particular noise thats starting to concern me though, i think its made this noise for a while but started to notice it more (maybe cause i can hear it and its bugging me ) anyway when im stood in the car with clutch pedal down in first gear ,as i lift off the clutch slowly i can hear a few sort of knocks cant pin point it though and its worrying me yet it happens everytime i pull off time and time again . Just wondered if anyone else has come across this problem,and , or is it normal. any info greatly appreciated .