Why cant we submit Engine recordings for Harmonic Analysis--I am very Frustrated and I've been searching he Posts for all the posts on funny engine noise and it dawned on me that all though many of us are good writers, "rattle-rattle"/"thump/thump" "woof woof" just doesnt cut it..why cant we all agree to use a certain Microphone palced at a certain point or ditance from the car using the same software on our PCs and submit our engine recordings on AVI files and getr some software to break them down into different categories of problems...

The reason:
I ask this 20 year Foreign car mechanic a lot of questions and recently I asked him to listen to my 300D W123 which lost oil and ran itself down to 0 bars.
He said the engine is dead and tired and to get rid of it. But you know what--he's been wrong before, and sometimes I wonder if he wants me to buy a new engine from him..(boy i am getting aparanoid in my middle age)

I just dont believe him. I hear a Rattling/Missing sound that drives me crazy and which makes the car sound like one of those 60's Gasser Hotrods that arent running right I used to here in the high school parking lot...

He says its bearings, crank bearings/ connecting rod bearings...

I just dont believe him. The car does a 100 mph and doesnt lose a drop of oil and has plenty of power, but the Rattling/missing sound just drives me crazy...

I know its not a bd injector because I replaced them all.

I am noot Loathe to pull the engine and rebuild it, I just dont want to do it for the wrong reason...