Hello, bought 2006 honda accord last owner put in a 2.4 jdm and it has a engine nose. I have changed out the belt tensioner, water pump and adjsuted the valves. With the serpentine belt off the nose seems to not be their. With a sterthoscope in the old ears sound like its coming from the exhust aera from the head? Any one have this before? can the injectors be that loud as the sound follows the engine rpm. TIA