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Engine Noise/ whirring tick

11K views 11 replies 11 participants last post by  fmerlino100174  
#1 ·
Just picked up my TB and am noticing what I would consider a whirring/ticking sound underneath the typical sewing machine valvetrain noise. Has anyone else experienced this? Almost sounds like an exhaust leak but very very faint. Noticeable at idle and increases with RPM’s. Fan? Turbo?