Hi guys, just bought my '92 S13 coupe and everything's fine except I keep hearing this funny scratching sound when the engine's in idle. The guy I bought it from says that its the "fan-clutch" or somethin and its normal. He said even if you bought the car brand new it would have that sound. Hmm I wasnt so sure but do you guys have the same experience? This is a completely stock KA24DE motor. I did do a search but didnt find anything, thanks for your time.