Hi Folk those who have followed my other two posts will be glad to know the loud loud rattle is gone, caused by the aircon bearing having broken up (and this has been fixed), but unfortunately I can now hear the engine properly and suspect the engine has other problems noise wise that were cloaked by the Ac bearing noise.
I was on the net listening to other's recorded sounds to get an idea of what I was looking at, this : Mazda 6 MPS noise on startup (vvt ???) - YouTube is very similar although mine is a tad more muffled, the sound is really evident inside the cabin at 700-1600RPM just like the linked video, and there is a faint inconstant clicking/tapping coming from the left of the engine where the chain run is.
I know about the injector's ticking sound and this is separate.
My issue it that although I am still well within the three month statutory warranty from the dealer, He has just paid for the ac bearing job at $400 and I'm not sure what he will say when I call him about this.
Also I am a little concerned about getting the diagnosis and resulting work from another local mechanic.
I don't want anyone destoying my engine trying to repair this, and will they be up on engine MPS sounds enough to call it?