D-Jet question, Throttle shaft concern and manifold id Options

[CatDaddy60]

Calling the DJet Ninjas. I picked up this intake manifold a couple of months ago and had some questions first how do you tell the difference between a 1.7 and a 1.8 liter manifold. The second question is on the throttle shaft there is a bit of play, enough that I'm sure this would cause an air/vacuum leak. Should I be concerned about it or is this a non issue. Thanks for your time.

[Krieger]

I'm not sure that I agree with Rich on on the leaky shaft for the throttle body. Unless the shaft is so worn that it cannot open and close smoothly and the throttle plate is rubbing in the bore. Or you can't adjust the car to idle properly. The throttle plate has a hole in it (controlled leak). There is an adjustable idle screw on the side of the throttle body (adjustable leak to set idle speed). All of this is only important when the car is at idle and the throttle plate is closed. As soon as you open the throttle when your driving air will be flowing over the throttle plate.