BimmerJeeper

Lots of threads talk about finding vacuum leaks, but often provide little detail or photos.
Can we make a master checklist to help beginners find vacuum leaks?
In order of most common vacuum leak, ideally with a photo.

Also, if a new XJ owner just feels like replacing every vacuum hose in the whole engine, is there an easy way to identify/accomplish this? Kit? List of hoses?

Here is my initial attempt at a comprehensive list.
Can we put it in the right order?
I will add photos if people can guide me to where to look:

• 2 CCV valves/grommets on the valve cover?
• Large bellows tube going into the throttle body (crack or seated improperly)
• Throttle body gasket (where it bolts to the intake manifold),
• All the hoses that come off the intake. (?)
• Can we identify all vacuum lines here?
• Lower injector o-rings (at the manifold),
• Loose intake/exhaust manifold bolts? That rear manifold bolt has a habit of loosening.
• Intake and exhaust manifold gasket.
• Check valve at the brake booster. It is a 1 way valve. To test just remove and blow into it. Should only be able to blow through 1 way.

Misc notes:
* During the period when you hear the whistle... pull out the engine oil dipstick slightly... this will induce a (another) vacuum leak... if the whistle vanishes... you will know that it corresponds to intake manifold vacuum changes... and so increases the possibility that it is a vacuum leak.

Vacuum leak near throttle body?
http://www.jeepforum.com/forum/f11/8...2/#post1104353