Quote Originally Posted by thobs View Post
pardon my ignorance, would it be more safe & tidy if you will take out the manifold first before drilling a hole, cause some of the bits & pieces of it might or will definitely go inside of the manifold (if its intake manifold we're talking here).

kindly ignore if am not making any sense.

You have a point however in your case the CRV manifold is abs so there is no metal dust. If we drill through plastic manifold there is no dust but a string thus there is no problem of dust going into the manifold.

HOwever in the case of metal manifold we do not drill in one go we drill in stages and use vacuum to suck the dust out of the manifold. Actually every installer have their own style.