Hello All,
My first time here, something the www cannot provide an answer for so hoping somebody can provide.
The image shows a pair of aftermarket inlet manifolds for a 3.0 V6 diesel from 2009, a common lump found within the Audi range throughout the '00s.
Each manifold is provided with a set of three screws which are surprisingly coarse and have unusually sharp-to-the-touch threads.
The stepper motors each attach to the bolt holes marked by red arrows, these holes are parallel bores i.e. they have no threads.
My hunch is that the screws are a form of self-tapping version, although they do not provide any flutes for waste material hence my decision to ask my questions here.
Is it usual for the holes to be unthreaded?
Are the screws indeed self-tapping?
On that basis, I assume I simply line up and drive the screw in to secure the motor.
Any insightful knowledge on this matter gratefully received.
Thank you.