my engine also had some excessive noise from the day i installed it in the car.... now when i tore it down i found that all the cylinders had ring wear and there wawe serious ridges on the top of all cylinders. i had to remove all the pistons using light tapping of a big hummer from underneath. but n1 cylinder was the hardest to take out... it needed few serious punches to be taken out. now i have rebored and installed new rings and pistons all round. hope noise levels will be decreased a bit
Advanced way of looking at noise! Can't do that with a Stethoscope.
I've used a freeware program "visual analyser" by sillanium software, which turns the computer into an ocilloscope, to do similar things, but depends on your soundcard. But with a decent microphone it can be very handy trying to work out when things are happening in the engine cycle. Also it is a fun toy, but I've found it takes a while to get the hang of it.
I'm enjoying Mark's habit of not taking things as gospel, also it is fun, now where did I put the popcorn?