Hey all, hoping someone on here can shed some light into this issue im having. Ive posted before about this same issue and thought I had it figured out but I was wrong, this noise is driving me crazy, im scared to drive my car at all. I stethescoped everywhere and everything sounds almost identical. The only real significant change in tone from cold to hot is the injectors. the upper cam cover bolt by CYL#5 is probably the loudest one of them all, but it stays pretty consistent through the temperature range. and the noise seems louder on the passenger side. Sorry forgot to mention this noise is only present after car is completely warmed up and to operating temp. This is an 03 cobra with 3,500 miles on it. head cooling mod installed immediately after I purchased the car with 3,200 miles on it. sorry i've been trying to upload the video for half an hour now, cant figure it out... How do I do this, every time I try the Upload a file it doesn't seem to work. I'm sure this is operator error so any help with this too would be awesome!!