I'm not sure a garden hose is a real accurate way of flow testing a radiator. But if the belt was your problem and that fixed the overheating, then that's a good thing!

I am not following the Throttle Stop adjustment... isn't the throttle stop on the front of the throttle body ? and the EGR is on the back of the common chamber ? <img src="/forums/images/graemlins/confused.gif" alt="" />

I'm going to post this info over on the AUX AIR VALVE thread that I started a while ago, but it kinda belongs here also:

Saturday I pulled the electrical connector from the bottom of the valve so it would stay open. I pulled the hose from the throttle body. I sprayed some carb cleaner right down the tube. This greatly improved my cold start situation! I'm assuming that the small hole in the plate in the valve was partially obstructed. Putting a thumb over the hose to check for vacuum is NOT a good test. All that will tell you is that you have _some_ flow through the valve. You could pull a vacuum on a 55 gallon drum through a pinhole if you had enough time! In my case, it doesn't seem that there was enough air being bypassed around the throttle body to increase the idle adequately . I'm going to do it again and see if it improves some more, because it still ain't "perfect", but at least now I can get out and close the garage door without having to restart it when I get back.

C/YA!
JB