Hello all, new to the site!

Ive owned my rx8 for just over a year now. Love the car! Brilliant. Just recently ive been getting this loud noise at high rpm which sounds really really bad. Almost sounds like its going to explode. No large noticeable power loss :-/ Sounds like it may be the manifold? It starts to occur around 7000 rpm then gets worse. Drives fine and sounds fine until i hit 7000.

Just taken it to a mazda dealer this morning and he says he has never heard the noise on an 8. He said my engine mounts are a bit worn but they shouldnt be making it make the noise. Dont know what to do? He said he could mess around for ages and never find whats wrong with it.

Things ive replaced on car since ive owned it.

Coils, leads, plugs, catalytic converter plus o2 sensors, Air filter, Oil filter, Oil.

PLEASE PLEASE, ANY HELP WOULD BE GREAT. Tearing my hair out.

Josh

 

Describe the noise. Whats it sound like?

Marbles in a can? if so, search for that phrase.

 

Its almost sounds like something is vibrating really loudly. Ive heard about the marbles in a can sound in a blender. Definatley nothing like that. When i was driving today i experienced a slight loss of power at the top end? :-/ Im stumped.